quick fixes

Update messages_it_IT.properties (#2401 )
📝 Update README: Translation Progress Table (#2399 )
2024-12-05 19:04:21 +00:00 · 2024-12-05 17:39:49 +00:00 · 2024-12-05 17:00:41 +00:00 · 2024-12-05 17:00:23 +00:00 · 2024-12-05 16:02:35 +00:00 · 2024-12-05 15:58:27 +00:00
71 changed files with 29369 additions and 471 deletions
--- a/README.md
+++ b/README.md
@@ -191,43 +191,43 @@ Stirling-PDF currently supports 37 languages!

 | Language                                     | Progress                               |
 | -------------------------------------------- | -------------------------------------- |
-| Arabic (العربية) (ar_AR)                        | ![98%](https://geps.dev/progress/98)   |
-| Azerbaijani (Azərbaycan Dili) (az_AZ)        | ![97%](https://geps.dev/progress/97)   |
-| Basque (Euskara) (eu_ES)                     | ![54%](https://geps.dev/progress/54)   |
-| Bulgarian (Български) (bg_BG)                | ![94%](https://geps.dev/progress/94)   |
-| Catalan (Català) (ca_CA)                     | ![88%](https://geps.dev/progress/88)   |
-| Croatian (Hrvatski) (hr_HR)                  | ![96%](https://geps.dev/progress/96)   |
-| Czech (Česky) (cs_CZ)                        | ![95%](https://geps.dev/progress/95)   |
-| Danish (Dansk) (da_DK)                       | ![94%](https://geps.dev/progress/94)   |
-| Dutch (Nederlands) (nl_NL)                   | ![94%](https://geps.dev/progress/94)   |
+| Arabic (العربية) (ar_AR)                        | ![95%](https://geps.dev/progress/95)   |
+| Azerbaijani (Azərbaycan Dili) (az_AZ)        | ![93%](https://geps.dev/progress/93)   |
+| Basque (Euskara) (eu_ES)                     | ![52%](https://geps.dev/progress/52)   |
+| Bulgarian (Български) (bg_BG)                | ![90%](https://geps.dev/progress/90)   |
+| Catalan (Català) (ca_CA)                     | ![84%](https://geps.dev/progress/84)   |
+| Croatian (Hrvatski) (hr_HR)                  | ![92%](https://geps.dev/progress/92)   |
+| Czech (Česky) (cs_CZ)                        | ![91%](https://geps.dev/progress/91)   |
+| Danish (Dansk) (da_DK)                       | ![90%](https://geps.dev/progress/90)   |
+| Dutch (Nederlands) (nl_NL)                   | ![90%](https://geps.dev/progress/90)   |
 | English (English) (en_GB)                    | ![100%](https://geps.dev/progress/100) |
 | English (US) (en_US)                         | ![100%](https://geps.dev/progress/100) |
-| French (Français) (fr_FR)                    | ![97%](https://geps.dev/progress/97)   |
-| German (Deutsch) (de_DE)                     | ![97%](https://geps.dev/progress/97)   |
-| Greek (Ελληνικά) (el_GR)                     | ![95%](https://geps.dev/progress/95)   |
-| Hindi (हिंदी) (hi_IN)                          | ![93%](https://geps.dev/progress/93)   |
-| Hungarian (Magyar) (hu_HU)                   | ![95%](https://geps.dev/progress/95)   |
-| Indonesian (Bahasa Indonesia) (id_ID)        | ![95%](https://geps.dev/progress/95)   |
-| Irish (Gaeilge) (ga_IE)                      | ![86%](https://geps.dev/progress/86)   |
-| Italian (Italiano) (it_IT)                   | ![99%](https://geps.dev/progress/99)   |
-| Japanese (日本語) (ja_JP)                    | ![83%](https://geps.dev/progress/83)   |
-| Korean (한국어) (ko_KR)                      | ![93%](https://geps.dev/progress/93)   |
-| Norwegian (Norsk) (no_NB)                    | ![85%](https://geps.dev/progress/85)   |
-| Polish (Polski) (pl_PL)                      | ![94%](https://geps.dev/progress/94)   |
-| Portuguese (Português) (pt_PT)               | ![95%](https://geps.dev/progress/95)   |
-| Portuguese Brazilian (Português) (pt_BR)     | ![96%](https://geps.dev/progress/96)   |
-| Romanian (Română) (ro_RO)                    | ![88%](https://geps.dev/progress/88)   |
-| Russian (Русский) (ru_RU)                    | ![95%](https://geps.dev/progress/95)   |
-| Serbian Latin alphabet (Srpski) (sr_LATN_RS) | ![68%](https://geps.dev/progress/68)   |
-| Simplified Chinese (简体中文) (zh_CN)         | ![89%](https://geps.dev/progress/89)   |
-| Slovakian (Slovensky) (sk_SK)                | ![80%](https://geps.dev/progress/80)   |
-| Spanish (Español) (es_ES)                    | ![96%](https://geps.dev/progress/96)   |
-| Swedish (Svenska) (sv_SE)                    | ![94%](https://geps.dev/progress/94)   |
-| Thai (ไทย) (th_TH)                           | ![94%](https://geps.dev/progress/94)   |
-| Traditional Chinese (繁體中文) (zh_TW)        | ![96%](https://geps.dev/progress/96)   |
-| Turkish (Türkçe) (tr_TR)                     | ![90%](https://geps.dev/progress/90)   |
-| Ukrainian (Українська) (uk_UA)               | ![78%](https://geps.dev/progress/78)   |
-| Vietnamese (Tiếng Việt) (vi_VN)              | ![86%](https://geps.dev/progress/86)   |
+| French (Français) (fr_FR)                    | ![93%](https://geps.dev/progress/93)   |
+| German (Deutsch) (de_DE)                     | ![93%](https://geps.dev/progress/93)   |
+| Greek (Ελληνικά) (el_GR)                     | ![91%](https://geps.dev/progress/91)   |
+| Hindi (हिंदी) (hi_IN)                          | ![89%](https://geps.dev/progress/89)   |
+| Hungarian (Magyar) (hu_HU)                   | ![92%](https://geps.dev/progress/92)   |
+| Indonesian (Bahasa Indonesia) (id_ID)        | ![91%](https://geps.dev/progress/91)   |
+| Irish (Gaeilge) (ga_IE)                      | ![82%](https://geps.dev/progress/82)   |
+| Italian (Italiano) (it_IT)                   | ![95%](https://geps.dev/progress/95)   |
+| Japanese (日本語) (ja_JP)                    | ![80%](https://geps.dev/progress/80)   |
+| Korean (한국어) (ko_KR)                      | ![89%](https://geps.dev/progress/89)   |
+| Norwegian (Norsk) (no_NB)                    | ![82%](https://geps.dev/progress/82)   |
+| Polish (Polski) (pl_PL)                      | ![91%](https://geps.dev/progress/91)   |
+| Portuguese (Português) (pt_PT)               | ![91%](https://geps.dev/progress/91)   |
+| Portuguese Brazilian (Português) (pt_BR)     | ![92%](https://geps.dev/progress/92)   |
+| Romanian (Română) (ro_RO)                    | ![84%](https://geps.dev/progress/84)   |
+| Russian (Русский) (ru_RU)                    | ![91%](https://geps.dev/progress/91)   |
+| Serbian Latin alphabet (Srpski) (sr_LATN_RS) | ![66%](https://geps.dev/progress/66)   |
+| Simplified Chinese (简体中文) (zh_CN)         | ![85%](https://geps.dev/progress/85)   |
+| Slovakian (Slovensky) (sk_SK)                | ![77%](https://geps.dev/progress/77)   |
+| Spanish (Español) (es_ES)                    | ![92%](https://geps.dev/progress/92)   |
+| Swedish (Svenska) (sv_SE)                    | ![91%](https://geps.dev/progress/91)   |
+| Thai (ไทย) (th_TH)                           | ![90%](https://geps.dev/progress/90)   |
+| Traditional Chinese (繁體中文) (zh_TW)        | ![92%](https://geps.dev/progress/92)   |
+| Turkish (Türkçe) (tr_TR)                     | ![86%](https://geps.dev/progress/86)   |
+| Ukrainian (Українська) (uk_UA)               | ![75%](https://geps.dev/progress/75)   |
+| Vietnamese (Tiếng Việt) (vi_VN)              | ![83%](https://geps.dev/progress/83)   |

 ## Contributing (Creating Issues, Translations, Fixing Bugs, etc.)

--- a/build.gradle
+++ b/build.gradle
@@ -26,7 +26,7 @@ ext {
 }

 group = "stirling.software"
-version = "0.35.0"
+version = "0.35.1"


 java {
--- a/src/main/java/stirling/software/SPDF/EE/LicenseKeyChecker.java
+++ b/src/main/java/stirling/software/SPDF/EE/LicenseKeyChecker.java
@@ -28,7 +28,7 @@ public class LicenseKeyChecker {
        this.checkLicense();
    }

-    @Scheduled(fixedRate = 604800000) // 7 days in milliseconds
+    @Scheduled(initialDelay = 604800000,fixedRate = 604800000) // 7 days in milliseconds
    public void checkLicensePeriodically() {
        checkLicense();
    }
--- a/src/main/java/stirling/software/SPDF/config/security/SecurityConfiguration.java
+++ b/src/main/java/stirling/software/SPDF/config/security/SecurityConfiguration.java
@@ -1,6 +1,5 @@
 package stirling.software.SPDF.config.security;

-import java.io.IOException;
 import java.security.cert.X509Certificate;
 import java.util.*;

@@ -13,7 +12,6 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.DependsOn;
 import org.springframework.context.annotation.Lazy;
 import org.springframework.core.io.Resource;
-import org.springframework.security.authentication.AuthenticationProvider;
 import org.springframework.security.authentication.ProviderManager;
 import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
 import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
@@ -32,35 +30,21 @@ import org.springframework.security.oauth2.client.registration.InMemoryClientReg
 import org.springframework.security.oauth2.core.user.OAuth2UserAuthority;
 import org.springframework.security.saml2.core.Saml2X509Credential;
 import org.springframework.security.saml2.core.Saml2X509Credential.Saml2X509CredentialType;
-import org.springframework.security.saml2.provider.service.authentication.AbstractSaml2AuthenticationRequest;
 import org.springframework.security.saml2.provider.service.authentication.OpenSaml4AuthenticationProvider;
 import org.springframework.security.saml2.provider.service.registration.InMemoryRelyingPartyRegistrationRepository;
 import org.springframework.security.saml2.provider.service.registration.RelyingPartyRegistration;
 import org.springframework.security.saml2.provider.service.registration.RelyingPartyRegistrationRepository;
 import org.springframework.security.saml2.provider.service.registration.Saml2MessageBinding;
-import org.springframework.security.saml2.provider.service.web.HttpSessionSaml2AuthenticationRequestRepository;
-import org.springframework.security.saml2.provider.service.web.Saml2AuthenticationRequestRepository;
 import org.springframework.security.saml2.provider.service.web.authentication.OpenSaml4AuthenticationRequestResolver;
 import org.springframework.security.web.SecurityFilterChain;
 import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
 import org.springframework.security.web.authentication.rememberme.PersistentTokenRepository;
-import org.springframework.security.web.authentication.session.RegisterSessionAuthenticationStrategy;
-import org.springframework.security.web.context.SecurityContextHolderFilter;
 import org.springframework.security.web.csrf.CookieCsrfTokenRepository;
 import org.springframework.security.web.csrf.CsrfTokenRequestAttributeHandler;
 import org.springframework.security.web.savedrequest.NullRequestCache;
-import org.springframework.security.web.session.ForceEagerSessionCreationFilter;
-import org.springframework.security.web.session.HttpSessionEventPublisher;
-import org.springframework.security.web.session.SessionManagementFilter;
 import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
-import org.springframework.session.web.http.CookieSerializer;
-import org.springframework.session.web.http.DefaultCookieSerializer;
-import org.springframework.web.filter.OncePerRequestFilter;

-import jakarta.servlet.FilterChain;
-import jakarta.servlet.ServletException;
 import jakarta.servlet.http.HttpServletRequest;
-import jakarta.servlet.http.HttpServletResponse;
 import lombok.extern.slf4j.Slf4j;
 import stirling.software.SPDF.config.security.oauth2.CustomOAuth2AuthenticationFailureHandler;
 import stirling.software.SPDF.config.security.oauth2.CustomOAuth2AuthenticationSuccessHandler;
@@ -163,7 +147,7 @@ public class SecurityConfiguration {
            http.sessionManagement(
                    sessionManagement ->
                            sessionManagement
-                            .sessionCreationPolicy(SessionCreationPolicy.IF_REQUIRED)
+                                    .sessionCreationPolicy(SessionCreationPolicy.IF_REQUIRED)
                                    .maximumSessions(10)
                                    .maxSessionsPreventsLogin(false)
                                    .sessionRegistry(sessionRegistry)
@@ -287,7 +271,6 @@ public class SecurityConfiguration {
                                                        relyingPartyRegistrations())
                                                .authenticationManager(
                                                        new ProviderManager(authenticationProvider))
-                                     
                                                .successHandler(
                                                        new CustomSaml2AuthenticationSuccessHandler(
                                                                loginAttemptService,
@@ -452,7 +435,7 @@ public class SecurityConfiguration {
                        .clientName("OIDC")
                        .build());
    }
-    
+
    @Bean
    @ConditionalOnProperty(
            name = "security.saml2.enabled",
@@ -506,7 +489,7 @@ public class SecurityConfiguration {

                    AuthnRequest authnRequest = customizer.getAuthnRequest();
                    log.debug("AuthnRequest ID: {}", authnRequest.getID());
-                    
+
                    if (authnRequest.getID() == null) {
                        authnRequest.setID("ARQ" + UUID.randomUUID().toString());
                    }
--- a/src/main/java/stirling/software/SPDF/controller/api/misc/MetadataController.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/misc/MetadataController.java
@@ -14,6 +14,8 @@ import org.apache.pdfbox.pdmodel.PDDocumentInformation;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.WebDataBinder;
+import org.springframework.web.bind.annotation.InitBinder;
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -26,6 +28,7 @@ import io.swagger.v3.oas.annotations.tags.Tag;

 import stirling.software.SPDF.model.api.misc.MetadataRequest;
 import stirling.software.SPDF.utils.WebResponseUtils;
+import stirling.software.SPDF.utils.propertyeditor.StringToMapPropertyEditor;

@RestController
@RequestMapping("/api/v1/misc")
@@ -44,6 +47,11 @@ public class MetadataController {
        return entry;
    }

+    @InitBinder
+    public void initBinder(WebDataBinder binder) {
+        binder.registerCustomEditor(Map.class, "allRequestParams", new StringToMapPropertyEditor());
+    }
+
    @PostMapping(consumes = "multipart/form-data", value = "/update-metadata")
    @Operation(
            summary = "Update metadata of a PDF file",
--- a/src/main/java/stirling/software/SPDF/controller/api/misc/StampController.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/misc/StampController.java
@@ -229,10 +229,22 @@ public class StampController {
                    calculatePositionY(
                            pageSize, position, calculateTextCapHeight(font, fontSize), margin);
        }
+        // Split the stampText into multiple lines
+        String[] lines = stampText.split("\\\\n");
+
+        // Calculate dynamic line height based on font ascent and descent
+        float ascent = font.getFontDescriptor().getAscent();
+        float descent = font.getFontDescriptor().getDescent();
+        float lineHeight = ((ascent - descent) / 1000) * fontSize;

        contentStream.beginText();
-        contentStream.setTextMatrix(Matrix.getRotateInstance(Math.toRadians(rotation), x, y));
-        contentStream.showText(stampText);
+        for (int i = 0; i < lines.length; i++) {
+            String line = lines[i];
+            // Set the text matrix for each line with rotation
+            contentStream.setTextMatrix(
+                    Matrix.getRotateInstance(Math.toRadians(rotation), x, y - (i * lineHeight)));
+            contentStream.showText(line);
+        }
        contentStream.endText();
    }

--- a/src/main/java/stirling/software/SPDF/controller/api/security/GetInfoOnPDF.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/security/GetInfoOnPDF.java
@@ -322,27 +322,14 @@ public class GetInfoOnPDF {
                PDEncryption pdfEncryption = pdfBoxDoc.getEncryption();
                encryption.put("EncryptionAlgorithm", pdfEncryption.getFilter());
                encryption.put("KeyLength", pdfEncryption.getLength());
-                AccessPermission ap = pdfBoxDoc.getCurrentAccessPermission();
-                if (ap != null) {
-                    ObjectNode permissionsNode = objectMapper.createObjectNode();
-
-                    permissionsNode.put("CanAssembleDocument", ap.canAssembleDocument());
-                    permissionsNode.put("CanExtractContent", ap.canExtractContent());
-                    permissionsNode.put(
-                            "CanExtractForAccessibility", ap.canExtractForAccessibility());
-                    permissionsNode.put("CanFillInForm", ap.canFillInForm());
-                    permissionsNode.put("CanModify", ap.canModify());
-                    permissionsNode.put("CanModifyAnnotations", ap.canModifyAnnotations());
-                    permissionsNode.put("CanPrint", ap.canPrint());
-
-                    encryption.set(
-                            "Permissions", permissionsNode); // set the node under "Permissions"
-                }
                // Add other encryption-related properties as needed
            } else {
                encryption.put("IsEncrypted", false);
            }

+            ObjectNode permissionsNode = objectMapper.createObjectNode();
+            setNodePermissions(pdfBoxDoc, permissionsNode);
+
            ObjectNode pageInfoParent = objectMapper.createObjectNode();
            for (int pageNum = 0; pageNum < pdfBoxDoc.getNumberOfPages(); pageNum++) {
                ObjectNode pageInfo = objectMapper.createObjectNode();
@@ -584,6 +571,7 @@ public class GetInfoOnPDF {
            jsonOutput.set("DocumentInfo", docInfoNode);
            jsonOutput.set("Compliancy", compliancy);
            jsonOutput.set("Encryption", encryption);
+            jsonOutput.set("Permissions", permissionsNode); // set the node under "Permissions"
            jsonOutput.set("Other", other);
            jsonOutput.set("PerPageInfo", pageInfoParent);

@@ -602,6 +590,22 @@ public class GetInfoOnPDF {
        return null;
    }

+    private void setNodePermissions(PDDocument pdfBoxDoc, ObjectNode permissionsNode) {
+        AccessPermission ap = pdfBoxDoc.getCurrentAccessPermission();
+
+        permissionsNode.put("Document Assembly", getPermissionState(ap.canAssembleDocument()));
+        permissionsNode.put("Extracting Content", getPermissionState(ap.canExtractContent()));
+        permissionsNode.put("Extracting for accessibility", getPermissionState(ap.canExtractForAccessibility()));
+        permissionsNode.put("Form Filling", getPermissionState(ap.canFillInForm()));
+        permissionsNode.put("Modifying", getPermissionState(ap.canModify()));
+        permissionsNode.put("Modifying annotations", getPermissionState(ap.canModifyAnnotations()));
+        permissionsNode.put("Printing", getPermissionState(ap.canPrint()));
+    }
+
+    private String getPermissionState(boolean state) {
+        return state ? "Allowed" : "Not Allowed";
+    }
+
    private static void addOutlinesToArray(PDOutlineItem outline, ArrayNode arrayNode) {
        if (outline == null) return;

--- a/src/main/java/stirling/software/SPDF/controller/api/security/ValidateSignatureController.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/security/ValidateSignatureController.java
@@ -0,0 +1,168 @@
+package stirling.software.SPDF.controller.api.security;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
+import java.security.interfaces.RSAPublicKey;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.interactive.digitalsignature.PDSignature;
+import org.bouncycastle.cert.X509CertificateHolder;
+import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
+import org.bouncycastle.cms.CMSProcessable;
+import org.bouncycastle.cms.CMSProcessableByteArray;
+import org.bouncycastle.cms.CMSSignedData;
+import org.bouncycastle.cms.SignerInformation;
+import org.bouncycastle.cms.SignerInformationStore;
+import org.bouncycastle.cms.jcajce.JcaSimpleSignerInfoVerifierBuilder;
+import org.bouncycastle.util.Store;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+
+import stirling.software.SPDF.model.api.security.SignatureValidationRequest;
+import stirling.software.SPDF.model.api.security.SignatureValidationResult;
+import stirling.software.SPDF.service.CertificateValidationService;
+import stirling.software.SPDF.service.CustomPDDocumentFactory;
+
+@RestController
+@RequestMapping("/api/v1/security")
+@Tag(name = "Security", description = "Security APIs")
+public class ValidateSignatureController {
+
+    private final CustomPDDocumentFactory pdfDocumentFactory;
+    private final CertificateValidationService certValidationService;
+
+    @Autowired
+    public ValidateSignatureController(
+            CustomPDDocumentFactory pdfDocumentFactory,
+            CertificateValidationService certValidationService) {
+        this.pdfDocumentFactory = pdfDocumentFactory;
+        this.certValidationService = certValidationService;
+    }
+
+    @Operation(
+            summary = "Validate PDF Digital Signature",
+            description =
+                    "Validates the digital signatures in a PDF file against default or custom certificates. Input:PDF Output:JSON Type:SISO")
+    @PostMapping(value = "/validate-signature")
+    public ResponseEntity<List<SignatureValidationResult>> validateSignature(
+            @ModelAttribute SignatureValidationRequest request) throws IOException {
+        List<SignatureValidationResult> results = new ArrayList<>();
+        MultipartFile file = request.getFileInput();
+
+        // Load custom certificate if provided
+        X509Certificate customCert = null;
+        if (request.getCertFile() != null && !request.getCertFile().isEmpty()) {
+            try (ByteArrayInputStream certStream =
+                    new ByteArrayInputStream(request.getCertFile().getBytes())) {
+                CertificateFactory cf = CertificateFactory.getInstance("X.509");
+                customCert = (X509Certificate) cf.generateCertificate(certStream);
+            } catch (CertificateException e) {
+                throw new RuntimeException("Invalid certificate file: " + e.getMessage());
+            }
+        }
+
+        try (PDDocument document = pdfDocumentFactory.load(file.getInputStream())) {
+            List<PDSignature> signatures = document.getSignatureDictionaries();
+
+            for (PDSignature sig : signatures) {
+                SignatureValidationResult result = new SignatureValidationResult();
+
+                try {
+                    byte[] signedContent = sig.getSignedContent(file.getInputStream());
+                    byte[] signatureBytes = sig.getContents(file.getInputStream());
+
+                    CMSProcessable content = new CMSProcessableByteArray(signedContent);
+                    CMSSignedData signedData = new CMSSignedData(content, signatureBytes);
+
+                    Store<X509CertificateHolder> certStore = signedData.getCertificates();
+                    SignerInformationStore signerStore = signedData.getSignerInfos();
+
+                    for (SignerInformation signer : signerStore.getSigners()) {
+                        X509CertificateHolder certHolder = (X509CertificateHolder) certStore.getMatches(signer.getSID()).iterator().next();
+                        X509Certificate cert = new JcaX509CertificateConverter().getCertificate(certHolder);
+
+                        boolean isValid = signer.verify(new JcaSimpleSignerInfoVerifierBuilder().build(cert));
+                        result.setValid(isValid);
+
+                        // Additional validations
+                        result.setChainValid(customCert != null 
+                            ? certValidationService.validateCertificateChainWithCustomCert(cert, customCert)
+                            : certValidationService.validateCertificateChain(cert));
+
+                        result.setTrustValid(customCert != null 
+                            ? certValidationService.validateTrustWithCustomCert(cert, customCert)
+                            : certValidationService.validateTrustStore(cert));
+
+                        result.setNotRevoked(!certValidationService.isRevoked(cert));
+                        result.setNotExpired(!cert.getNotAfter().before(new Date()));
+
+                        // Set basic signature info
+                        result.setSignerName(sig.getName());
+                        result.setSignatureDate(sig.getSignDate().getTime().toString());
+                        result.setReason(sig.getReason());
+                        result.setLocation(sig.getLocation());
+
+                        // Set new certificate details
+                        result.setIssuerDN(cert.getIssuerX500Principal().getName());
+                        result.setSubjectDN(cert.getSubjectX500Principal().getName());
+                        result.setSerialNumber(cert.getSerialNumber().toString(16)); // Hex format
+                        result.setValidFrom(cert.getNotBefore().toString());
+                        result.setValidUntil(cert.getNotAfter().toString());
+                        result.setSignatureAlgorithm(cert.getSigAlgName());
+                        
+                        // Get key size (if possible)
+                        try {
+                            result.setKeySize(((RSAPublicKey) cert.getPublicKey()).getModulus().bitLength());
+                        } catch (Exception e) {
+                            // If not RSA or error, set to 0
+                            result.setKeySize(0);
+                        }
+
+                        result.setVersion(String.valueOf(cert.getVersion()));
+                        
+                        // Set key usage
+                        List<String> keyUsages = new ArrayList<>();
+                        boolean[] keyUsageFlags = cert.getKeyUsage();
+                        if (keyUsageFlags != null) {
+                            String[] keyUsageLabels = {
+                                "Digital Signature", "Non-Repudiation", "Key Encipherment",
+                                "Data Encipherment", "Key Agreement", "Certificate Signing",
+                                "CRL Signing", "Encipher Only", "Decipher Only"
+                            };
+                            for (int i = 0; i < keyUsageFlags.length; i++) {
+                                if (keyUsageFlags[i]) {
+                                    keyUsages.add(keyUsageLabels[i]);
+                                }
+                            }
+                        }
+                        result.setKeyUsages(keyUsages);
+                        
+                        // Check if self-signed
+                        result.setSelfSigned(cert.getSubjectX500Principal().equals(cert.getIssuerX500Principal()));
+                    }
+                } catch (Exception e) {
+                    result.setValid(false);
+                    result.setErrorMessage("Signature validation failed: " + e.getMessage());
+                }
+
+                results.add(result);
+            }
+        }
+
+        return ResponseEntity.ok(results);
+    }
+}
--- a/src/main/java/stirling/software/SPDF/controller/web/SecurityWebController.java
+++ b/src/main/java/stirling/software/SPDF/controller/web/SecurityWebController.java
@@ -53,6 +53,13 @@ public class SecurityWebController {
        return "security/cert-sign";
    }

+    @GetMapping("/validate-signature")
+    @Hidden
+    public String certSignVerifyForm(Model model) {
+        model.addAttribute("currentPage", "validate-signature");
+        return "security/validate-signature";
+    }
+
    @GetMapping("/remove-cert-sign")
    @Hidden
    public String certUnSignForm(Model model) {
--- a/src/main/java/stirling/software/SPDF/model/api/security/SignatureValidationRequest.java
+++ b/src/main/java/stirling/software/SPDF/model/api/security/SignatureValidationRequest.java
@@ -0,0 +1,17 @@
+package stirling.software.SPDF.model.api.security;
+
+import org.springframework.web.multipart.MultipartFile;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import stirling.software.SPDF.model.api.PDFFile;
+
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class SignatureValidationRequest extends PDFFile {
+
+    @Schema(description = "(Optional) file to compare PDF cert signatures against x.509 format")
+    private MultipartFile certFile;
+}
--- a/src/main/java/stirling/software/SPDF/model/api/security/SignatureValidationResult.java
+++ b/src/main/java/stirling/software/SPDF/model/api/security/SignatureValidationResult.java
@@ -0,0 +1,31 @@
+package stirling.software.SPDF.model.api.security;
+
+import java.util.List;
+
+import lombok.Data;
+
+@Data
+public class SignatureValidationResult {
+    private boolean valid;
+    private String signerName;
+    private String signatureDate;
+    private String reason;
+    private String location;
+    private String errorMessage;
+    private boolean chainValid;
+    private boolean trustValid;
+    private boolean notExpired;
+    private boolean notRevoked;
+    
+    private String issuerDN;          // Certificate issuer's Distinguished Name
+    private String subjectDN;         // Certificate subject's Distinguished Name
+    private String serialNumber;      // Certificate serial number
+    private String validFrom;         // Certificate validity start date
+    private String validUntil;        // Certificate validity end date
+    private String signatureAlgorithm;// Algorithm used for signing
+    private int keySize;              // Key size in bits
+    private String version;           // Certificate version
+    private List<String> keyUsages;   // List of key usage purposes
+    private boolean isSelfSigned;     // Whether the certificate is self-signed
+    
+}
--- a/src/main/java/stirling/software/SPDF/service/CertificateValidationService.java
+++ b/src/main/java/stirling/software/SPDF/service/CertificateValidationService.java
@@ -0,0 +1,157 @@
+package stirling.software.SPDF.service;
+
+import io.github.pixee.security.BoundedLineReader;
+import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.security.KeyStore;
+import java.security.KeyStoreException;
+import java.security.cert.CertPath;
+import java.security.cert.CertPathValidator;
+import java.security.cert.CertificateExpiredException;
+import java.security.cert.CertificateFactory;
+import java.security.cert.CertificateNotYetValidException;
+import java.security.cert.PKIXParameters;
+import java.security.cert.TrustAnchor;
+import java.security.cert.X509Certificate;
+import java.util.Arrays;
+import java.util.Enumeration;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import org.springframework.stereotype.Service;
+
+import jakarta.annotation.PostConstruct;
+
+@Service
+public class CertificateValidationService {
+    private KeyStore trustStore;
+
+    @PostConstruct
+    private void initializeTrustStore() throws Exception {
+        trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
+        trustStore.load(null, null);
+        loadMozillaCertificates();
+    }
+
+    private void loadMozillaCertificates() throws Exception {
+        try (InputStream is = getClass().getResourceAsStream("/certdata.txt")) {
+            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
+            String line;
+            StringBuilder certData = new StringBuilder();
+            boolean inCert = false;
+            int certCount = 0;
+
+            while ((line = BoundedLineReader.readLine(reader, 5_000_000)) != null) {
+                if (line.startsWith("CKA_VALUE MULTILINE_OCTAL")) {
+                    inCert = true;
+                    certData = new StringBuilder();
+                    continue;
+                }
+                if (inCert) {
+                    if ("END".equals(line)) {
+                        inCert = false;
+                        byte[] certBytes = parseOctalData(certData.toString());
+                        if (certBytes != null) {
+                            CertificateFactory cf = CertificateFactory.getInstance("X.509");
+                            X509Certificate cert =
+                                    (X509Certificate)
+                                            cf.generateCertificate(
+                                                    new ByteArrayInputStream(certBytes));
+                            trustStore.setCertificateEntry("mozilla-cert-" + certCount++, cert);
+                        }
+                    } else {
+                        certData.append(line).append("\n");
+                    }
+                }
+            }
+        }
+    }
+
+    private byte[] parseOctalData(String data) {
+        try {
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            String[] tokens = data.split("\\\\");
+            for (String token : tokens) {
+                token = token.trim();
+                if (!token.isEmpty()) {
+                    baos.write(Integer.parseInt(token, 8));
+                }
+            }
+            return baos.toByteArray();
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    public boolean validateCertificateChain(X509Certificate cert) {
+        try {
+            CertPathValidator validator = CertPathValidator.getInstance("PKIX");
+            CertificateFactory cf = CertificateFactory.getInstance("X.509");
+            List<X509Certificate> certList = Arrays.asList(cert);
+            CertPath certPath = cf.generateCertPath(certList);
+
+            Set<TrustAnchor> anchors = new HashSet<>();
+            Enumeration<String> aliases = trustStore.aliases();
+            while (aliases.hasMoreElements()) {
+                Object trustCert = trustStore.getCertificate(aliases.nextElement());
+                if (trustCert instanceof X509Certificate) {
+                    anchors.add(new TrustAnchor((X509Certificate) trustCert, null));
+                }
+            }
+
+            PKIXParameters params = new PKIXParameters(anchors);
+            params.setRevocationEnabled(false);
+            validator.validate(certPath, params);
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    public boolean validateTrustStore(X509Certificate cert) {
+        try {
+            Enumeration<String> aliases = trustStore.aliases();
+            while (aliases.hasMoreElements()) {
+                Object trustCert = trustStore.getCertificate(aliases.nextElement());
+                if (trustCert instanceof X509Certificate && cert.equals(trustCert)) {
+                    return true;
+                }
+            }
+            return false;
+        } catch (KeyStoreException e) {
+            return false;
+        }
+    }
+
+    public boolean isRevoked(X509Certificate cert) {
+        try {
+            cert.checkValidity();
+            return false;
+        } catch (CertificateExpiredException | CertificateNotYetValidException e) {
+            return true;
+        }
+    }
+
+    public boolean validateCertificateChainWithCustomCert(
+            X509Certificate cert, X509Certificate customCert) {
+        try {
+            cert.verify(customCert.getPublicKey());
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    public boolean validateTrustWithCustomCert(X509Certificate cert, X509Certificate customCert) {
+        try {
+            // Compare the issuer of the signature certificate with the custom certificate
+            return cert.getIssuerX500Principal().equals(customCert.getSubjectX500Principal());
+        } catch (Exception e) {
+            return false;
+        }
+    }
+}
--- a/src/main/java/stirling/software/SPDF/service/MetricsAggregatorService.java
+++ b/src/main/java/stirling/software/SPDF/service/MetricsAggregatorService.java
@@ -24,7 +24,7 @@ public class MetricsAggregatorService {
        this.postHogService = postHogService;
    }

-    @Scheduled(fixedRate = 1800000) // Run every 30 minutes
+    @Scheduled(fixedRate = 7200000) // Run every 2 hours
    public void aggregateAndSendMetrics() {
        Map<String, Object> metrics = new HashMap<>();
        Search.in(meterRegistry)
--- a/src/main/java/stirling/software/SPDF/utils/propertyeditor/StringToMapPropertyEditor.java
+++ b/src/main/java/stirling/software/SPDF/utils/propertyeditor/StringToMapPropertyEditor.java
@@ -0,0 +1,26 @@
+package stirling.software.SPDF.utils.propertyeditor;
+
+import java.beans.PropertyEditorSupport;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class StringToMapPropertyEditor extends PropertyEditorSupport {
+
+    private final ObjectMapper objectMapper = new ObjectMapper();
+
+    @Override
+    public void setAsText(String text) throws IllegalArgumentException {
+        try {
+            TypeReference<HashMap<String, String>> typeRef =
+                    new TypeReference<HashMap<String, String>>() {};
+            Map<String, String> map = objectMapper.readValue(text, typeRef);
+            setValue(map);
+        } catch (Exception e) {
+            throw new IllegalArgumentException(
+                    "Failed to convert java.lang.String to java.util.Map");
+        }
+    }
+}
--- a/src/main/resources/certdata.txt
+++ b/src/main/resources/certdata.txt
--- a/src/main/resources/messages_ar_AR.properties
+++ b/src/main/resources/messages_ar_AR.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=تجزئة المستندات PDF حسب الفص
 home.splitPdfByChapters.desc=قسم مستند PDF إلى ملفات متعددة بناءً على هيكل فصوله.
 splitPdfByChapters.tags=تجزئة، فصول، علامات تبويب، تنظيم

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=إستبدال-عكس اللون
 replace-color.header=استبدال-عكس لون PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=تمثيل البيانات الأصلية: إذا تم
 splitByChapters.desc.4=سماح بالتكرار: إذا تم اختياره، يسمح بوجود معاينات متعددة في الصفحة نفسها لخلق ملفات PDF منفصلة.
 splitByChapters.submit=تقطيع ملف PDF

+#File Chooser
+fileChooser.click=انقر هنا
+fileChooser.or=أو
+fileChooser.dragAndDrop=قم بسحب الملفات وإفلاتها
+fileChooser.hoveredDragAndDrop=قم بسحب المفات وإفلاتها هنا

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_az_AZ.properties
+++ b/src/main/resources/messages_az_AZ.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=PDF-i Fəsillərə Əsasən Böl
 home.splitPdfByChapters.desc=Fəsil strukturuna əsasən PDF-i bir neçə fayla böl.
 splitPdfByChapters.tags=böl,fəsillər,əlfəcinlər,nizamla

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Qabaqcıl Rəng Seçimləri
 replace-color.header=PDF-də Rəngləri Dəyiş-Tərsinə Çevir
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Metadatanı daxil edin: Əgər yoxlanılıbsa, orijinal P
 splitByChapters.desc.4=Allow Duplicates: Dublikatlara icazə verin: Əgər işarələnərsə, eyni səhifədə birdən çox bookmarka ayrı-ayrı PDF sənədləri yaratmağa icazə verin.
 splitByChapters.submit=PDF-i Ayır

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Buraxılışlar
@@ -1270,3 +1279,39 @@ releases.title=Buraxılış Qeydləri
 releases.header=Buraxılış Qeydləri
 releases.current.version=Hazırki Buraxılış
 releases.note=Buraxılış Qeydləri yalnız ingiliscə mövcuddur
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_bg_BG.properties
+++ b/src/main/resources/messages_bg_BG.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Разделете PDF по глави
 home.splitPdfByChapters.desc=Разделете PDF на множество файлове въз основа на неговата структура на глави.
 splitPdfByChapters.tags=разделяне, глави, отметки, организиране

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Замени-инвертиране-на-цвят
 replace-color.header=Замяна-инвертиране на цвят PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Включване на метаданни: Ако е о
 splitByChapters.desc.4=Разрешаване на дубликати: Ако е отметнато, позволява множество отметки на една и съща страница за създаване на отделни PDF файлове.
 splitByChapters.submit=Разделяне на PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_ca_CA.properties
+++ b/src/main/resources/messages_ca_CA.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Divideix PDF per Capítols
 home.splitPdfByChapters.desc=Divideix un PDF en múltiples fitxers segons la seva estructura de capítols.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Reemplaça-Inverteix-Color
 replace-color.header=Reemplaça-Inverteix Color en PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Incloure Metadades: Si està marcat, les metadades del PD
 splitByChapters.desc.4=Permetre Duplicats: Si està marcat, permet diversos marcadors a la mateixa pàgina per crear PDFs separats.
 splitByChapters.submit=Divideix PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_cs_CZ.properties
+++ b/src/main/resources/messages_cs_CZ.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Rozdělit PDF podle kapitol
 home.splitPdfByChapters.desc=Rozdělit PDF do více souborů na základě jeho struktury kapitol.
 splitPdfByChapters.tags=rozdělení, kapitoly, zápisky, organizace

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Nahradit inverzní barvu PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Zahrnout metadatů: Pokud je zaškrtnuto, původní metad
 splitByChapters.desc.4=Povolit duplicitní záznamy: Pokud je zaškrtnuto, návštěvníci mohou vytvořit samostatné PDF soubory z více záhlaví na stejné straně.
 splitByChapters.submit=Podělit se PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_da_DK.properties
+++ b/src/main/resources/messages_da_DK.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Partitioner PDF efter kapitler
 home.splitPdfByChapters.desc=Partitioner en PDF i flere filer baseret på dens kapitelstruktur.
 splitPdfByChapters.tags=partitionering,kapitler,merker,organisering

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Erstat-omgivende Farve PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Inkluder metadata: Hvis markeret, vil den originale PDF's
 splitByChapters.desc.4=Tillad duplikater: Hvis markeret, tillader det flere bogmærker på samme side til at oprette separate PDF'er.
 splitByChapters.submit=Splitter PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_de_DE.properties
+++ b/src/main/resources/messages_de_DE.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=PDF-Datei nach Kapiteln aufteilen
 home.splitPdfByChapters.desc=Aufteilung einer PDF-Datei in mehrere Dateien auf Basis der Kapitelstruktur.
 splitPdfByChapters.tags=aufteilen,kapitel,lesezeichen,organisieren

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Farbe Ersetzen-Invertieren
 replace-color.header=Farb-PDF Ersetzen-Invertieren
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Metadaten einschließen: Wenn diese Option aktiviert ist,
 splitByChapters.desc.4=Duplikate erlauben: Wenn diese Option aktiviert ist, können mehrere Lesezeichen auf derselben Seite separate PDF Dateien erstellen.
 splitByChapters.submit=PDF teilen

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_el_GR.properties
+++ b/src/main/resources/messages_el_GR.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Διχοτομία PDF ανά Περιγραφές
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=διχοτομία,περιγραφές,κεφάλαια,συνορία

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Αντικατάσταση-Αντίστροφη Παθωμένη Πίντσουρ
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Επιλέξτε PDF για την προσθήκη το
 watermark.selectText.2=Κείμενο Υδατογραφήματος:
 watermark.selectText.3=Μέγεθος Κειμένου:
 watermark.selectText.4=Περιστροφή (0-360):
-watermark.selectText.5=widthSpacer (Κενό μεταξύ κάθε υδατογραφήματος οριζόντια):
-watermark.selectText.6=heightSpacer (Κενό μεταξύ κάθε υδατογραφήματος κάθετα):
+watermark.selectText.5=Width Spacer (Κενό μεταξύ κάθε υδατογραφήματος οριζόντια):
+watermark.selectText.6=Height Spacer (Κενό μεταξύ κάθε υδατογραφήματος κάθετα):
 watermark.selectText.7=Αδιαφάνεια (Opacity) (0% - 100%):
 watermark.selectText.8=Τύπος Υδατογραφήματος:
 watermark.selectText.9=Εικόνα Υδατογραφήματος:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Πρόσθεση Metadata: Αν επεξεργαστεί
 splitByChapters.desc.4=Διάλυση Παρόντων Τίτλων Επιπέδου: Αν επεξεργαστείται, επιτρέπει τη δημιουργία αποκοπών PDF με βάση πλήρως καθορισμένους σήμαντες έδρας.
 splitByChapters.submit=Διαλύστε το PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_en_GB.properties
+++ b/src/main/resources/messages_en_GB.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Advanced Colour options
 replace-color.header=Replace-Invert Color PDF
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Select PDF to add watermark to:
 watermark.selectText.2=Watermark Text:
 watermark.selectText.3=Font Size:
 watermark.selectText.4=Rotation (0-360):
-watermark.selectText.5=widthSpacer (Space between each watermark horizontally):
-watermark.selectText.6=heightSpacer (Space between each watermark vertically):
+watermark.selectText.5=Width Spacer (Space between each watermark horizontally):
+watermark.selectText.6=Height Spacer (Space between each watermark vertically):
 watermark.selectText.7=Opacity (0% - 100%):
 watermark.selectText.8=Watermark Type:
 watermark.selectText.9=Watermark Image:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_en_US.properties
+++ b/src/main/resources/messages_en_US.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Select PDF to add watermark to:
 watermark.selectText.2=Watermark Text:
 watermark.selectText.3=Font Size:
 watermark.selectText.4=Rotation (0-360):
-watermark.selectText.5=widthSpacer (Space between each watermark horizontally):
-watermark.selectText.6=heightSpacer (Space between each watermark vertically):
+watermark.selectText.5=Width Spacer (Space between each watermark horizontally):
+watermark.selectText.6=Height Spacer (Space between each watermark vertically):
 watermark.selectText.7=Opacity (0% - 100%):
 watermark.selectText.8=Watermark Type:
 watermark.selectText.9=Watermark Image:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_es_ES.properties
+++ b/src/main/resources/messages_es_ES.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Dividir PDF por capítulos
 home.splitPdfByChapters.desc=Divida un PDF en varios archivos según su estructura de capítulos.
 splitPdfByChapters.tags=dividir,capítulos,marcadores,organizar

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Reemplazar-Invertir-Color
 replace-color.header=Reemplazar-Invertir Color en PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Incluir Metadatos: Si está seleccionado, los metadatos d
 splitByChapters.desc.4=Permitir Duplicados: Si está seleccionado, permite que múltiples marcadores en la misma página creen archivos PDF separados.
 splitByChapters.submit=Dividir PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_eu_ES.properties
+++ b/src/main/resources/messages_eu_ES.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_fr_FR.properties
+++ b/src/main/resources/messages_fr_FR.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Séparer un PDF par chapitres
 home.splitPdfByChapters.desc=Séparez un PDF en fichiers multiples en fonction de sa structure par chapitres.
 splitPdfByChapters.tags=séparer,chapitres,split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Remplacer-Inverser-Couleur
 replace-color.header=Remplacer-Inverser Couleur PDF
@@ -1056,8 +1060,8 @@ watermark.selectText.1=PDF auquel ajouter un filigrane
 watermark.selectText.2=Texte du filigrane
 watermark.selectText.3=Taille de police
 watermark.selectText.4=Rotation (de 0 à 360 degrés)
-watermark.selectText.5=widthSpacer (espace entre chaque filigrane horizontalement)
-watermark.selectText.6=heightSpacer (espace entre chaque filigrane verticalement)
+watermark.selectText.5=Width Spacer (espace entre chaque filigrane horizontalement)
+watermark.selectText.6=Height Spacer (espace entre chaque filigrane verticalement)
 watermark.selectText.7=Opacité (de 0% à 100%)
 watermark.selectText.8=Type de filigrane
 watermark.selectText.9=Image du filigrane
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Inclure les Métadonnées : Si coché, les métadonnées
 splitByChapters.desc.4=Autoriser les Doublons : Si coché, permet à plusieurs signets sur la même page de créer des PDF séparés.
 splitByChapters.submit=Diviser le PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_ga_IE.properties
+++ b/src/main/resources/messages_ga_IE.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1056,7 +1060,7 @@ watermark.selectText.1=Roghnaigh PDF chun comhartha uisce a chur leis:
 watermark.selectText.2=Téacs Comhartha Uisce:
 watermark.selectText.3=Méid cló:
 watermark.selectText.4=Rothlú (0-360):
-watermark.selectText.5=widthSpacer (Spás idir gach comhartha uisce go cothrománach):
+watermark.selectText.5=Width Spacer (Spás idir gach comhartha uisce go cothrománach):
 watermark.selectText.6=spásaire airde (Spás idir gach comhartha uisce go hingearach):
 watermark.selectText.7=Teimhneacht (0% - 100%):
 watermark.selectText.8=Cineál Comhartha Uisce:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_hi_IN.properties
+++ b/src/main/resources/messages_hi_IN.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=अध्यायों पर अलग-कर
 home.splitPdfByChapters.desc=पुस्तक के अध्याय की संरचना पर आधारित एक PDF को बहिन-भागों में विभाजित करें
 splitPdfByChapters.tags=विभाजन,अध्याय,पसंदीदा,रजैत

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=चित्र रंग परिवर्तन/उलटकर परिवर्तन PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=मॉडेटरेट का शामिल करे
 splitByChapters.desc.4=यादृच्छिक पुनरावृत्ति अनुमोदित: यदि सत्यापित किया जाता है, एक ही पेज पर दोहरे मूल्यांकन पब्लिक पीड़एफ बनाने की संभावना देता है।
 splitByChapters.submit=PDF विभाजित

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_hr_HR.properties
+++ b/src/main/resources/messages_hr_HR.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Podijeli PDF prema glavama
 home.splitPdfByChapters.desc=Podijeli PDF na više datoteka prema njegovom strukturnom obliku glava.
 splitPdfByChapters.tags=podjela, glave, markere, organizacija

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Zameni-inverziranje boja u PDF-u
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Uključi metapodatke: Ako je pokušano, metapodaci iz ori
 splitByChapters.desc.4=Dopuštaj duplikate: Ako je ova opcija zaštićena, dozvoljava se da se na istoj strani mogu stvoriti posebne PDF datoteke s više oznaka.
 splitByChapters.submit=Podijeli PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_hu_HU.properties
+++ b/src/main/resources/messages_hu_HU.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=PDF felosztása fejezetek szerint
 home.splitPdfByChapters.desc=Fejezetei alapján egy PDF fájl több dokumentumba osztás.
 splitPdfByChapters.tags=Osztás, fejezetek, jelezes, organizálás

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Visszaalakítás-összevétel a színekkel PDF-ben
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Válassza ki a PDF-t, amelyhez vízjelet kíván hozzáad
 watermark.selectText.2=Vízjel szövege:
 watermark.selectText.3=Betűméret:
 watermark.selectText.4=Forgatás (0-360):
-watermark.selectText.5=widthSpacer (Hely a vízjelek között vízszintesen):
-watermark.selectText.6=heightSpacer (Hely a vízjelek között függőlegesen):
+watermark.selectText.5=Width Spacer (Hely a vízjelek között vízszintesen):
+watermark.selectText.6=Height Spacer (Hely a vízjelek között függőlegesen):
 watermark.selectText.7=Átlátszóság (0% - 100%):
 watermark.selectText.8=Vízjel típusa:
 watermark.selectText.9=Vízjel képe:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Metaadatok belefoglalása: Ha bevanítva van, az eredeti
 splitByChapters.desc.4=Duplikációk engedélyezése: Ha bevanítva van, lehetővé teszi a megadott oldalon lévő több kijelzőszint alapján új PDF-ek létrehozása.
 splitByChapters.submit=PDF osztás

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_id_ID.properties
+++ b/src/main/resources/messages_id_ID.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Pisahkan PDF berdasarkan Bab
 home.splitPdfByChapters.desc=Memisahkan PDF menjadi beberapa file berdasarkan struktur babnya.
 splitPdfByChapters.tags=pemisahan,bab,bookmark,atur

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Ganti-Inversi-Warna
 replace-color.header=Ganti-Inversi Warna PDF
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Pilih PDF untuk menambahkan watermark:
 watermark.selectText.2=Text Watermark:
 watermark.selectText.3=Ukuran Huruf:
 watermark.selectText.4=Rotasi (0-360):
-watermark.selectText.5=widthSpacer (Spasi diantara setiap watermark horisontal):
-watermark.selectText.6=heightSpacer (Spasi diantara setiap watermark vertikal):
+watermark.selectText.5=Width Spacer (Spasi diantara setiap watermark horisontal):
+watermark.selectText.6=Height Spacer (Spasi diantara setiap watermark vertikal):
 watermark.selectText.7=Kejernihan (0% - 100%):
 watermark.selectText.8=Tipe Watermark:
 watermark.selectText.9=Gambar Watermark:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Termasuk Metadata: Jika dicentang, metadata asli PDF akan
 splitByChapters.desc.4=Izinkan Duplikat: Jika dicentang, mengizinkan beberapa markah pada halaman yang sama untuk membuat PDF terpisah.
 splitByChapters.submit=Pecah PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_it_IT.properties
+++ b/src/main/resources/messages_it_IT.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Dividi PDF per capitoli
 home.splitPdfByChapters.desc=Dividi un PDF in più file in base alla struttura dei capitoli.
 splitPdfByChapters.tags=dividi, capitoli, segnalibri, organizza

+home.validateSignature.title=Convalida la firma PDF
+home.validateSignature.desc=Verificare le firme digitali e i certificati nei documenti PDF
+validateSignature.tags=firma,verifica,convalida,pdf,certificato,firma digitale,convalida firma,convalida certificato
+
 #replace-invert-color
 replace-color.title=Sostituisci-Inverti-Colore
 replace-color.header=Sostituisci-Inverti colore PDF
@@ -958,8 +962,8 @@ multiTool.moveLeft=Sposta a sinistra
 multiTool.moveRight=Sposta a destra
 multiTool.delete=Elimina
 multiTool.dragDropMessage=Pagina(e) selezionata(e)
-multiTool.undo=Undo
-multiTool.redo=Redo
+multiTool.undo=Annulla
+multiTool.redo=Rifai

 #multiTool-advert
 multiTool-advert.message=Questa funzione è disponibile anche nella nostra <a href="{0}">pagina multi-strumento</a>. Scoprila per un'interfaccia utente pagina per pagina migliorata e funzionalità aggiuntive!
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Includi metadati: se selezionato, i metadati del PDF orig
 splitByChapters.desc.4=Consenti duplicati: se selezionata, consente più segnalibri sulla stessa pagina per creare PDF separati.
 splitByChapters.submit=Dividi PDF

+#File Chooser
+fileChooser.click=Clicca
+fileChooser.or=o
+fileChooser.dragAndDrop=Trascina & Rilascia
+fileChooser.hoveredDragAndDrop=Trascina & rilascia i file qui

 #release notes
 releases.footer=Rilasci
@@ -1270,3 +1279,39 @@ releases.title=Note di rilascio
 releases.header=Note di rilascio
 releases.current.version=Rilascio corrente
 releases.note=Le note di rilascio sono disponibili solo in inglese
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validare le firme PDF
+validateSignature.header=Convalidare le firme digitali
+validateSignature.selectPDF=Seleziona il file PDF firmato
+validateSignature.submit=Convalida firme
+validateSignature.results=Risultati di convalida
+validateSignature.status=Stato
+validateSignature.signer=Firmatario
+validateSignature.date=Data
+validateSignature.reason=Ragione
+validateSignature.location=Posizione
+validateSignature.noSignatures=Nessuna firma digitale trovata in questo documento
+validateSignature.status.valid=Valida
+validateSignature.status.invalid=Invalida
+validateSignature.chain.invalid=Convalida della catena di certificati non riuscita: impossibile verificare l'identità del firmatario
+validateSignature.trust.invalid=Certificato non presente nell'archivio attendibile: la fonte non può essere verificata
+validateSignature.cert.expired=Il certificato è scaduto
+validateSignature.cert.revoked=Il certificato è stato revocato
+validateSignature.signature.info=Informazioni sulla firma
+validateSignature.signature=Firma
+validateSignature.signature.mathValid=La firma è matematicamente valida MA:
+validateSignature.selectCustomCert=File di certificato personalizzato X.509 (opzionale)
+validateSignature.cert.info=Dettagli del certificato
+validateSignature.cert.issuer=Emittente
+validateSignature.cert.subject=Soggetto
+validateSignature.cert.serialNumber=Numero di serie
+validateSignature.cert.validFrom=Valido da
+validateSignature.cert.validUntil=Valido fino a
+validateSignature.cert.algorithm=Algoritmo
+validateSignature.cert.keySize=Dimensione chiave
+validateSignature.cert.version=Versione
+validateSignature.cert.keyUsage=Utilizzo della chiave
+validateSignature.cert.selfSigned=Autofirmato
+validateSignature.cert.bits=bit
--- a/src/main/resources/messages_ja_JP.properties
+++ b/src/main/resources/messages_ja_JP.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_ko_KR.properties
+++ b/src/main/resources/messages_ko_KR.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=챕터별로 PDF 분할
 home.splitPdfByChapters.desc=PDF를 여러 파일로 나눕니다. 각 장의 구조에 따라.
 splitPdfByChapters.tags=분할, 챕터, 북마크, 조직화

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=색상 교체/반전 PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=메타데이터 포함: 체크하면 각 분할된 PDF에
 splitByChapters.desc.4=중복 허용: 중복 북마크가 있는 같은 페이지에 여러 번 분할 PDF를 생성합니다.
 splitByChapters.submit=PDF 분할

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_nl_NL.properties
+++ b/src/main/resources/messages_nl_NL.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=PDF op hoofdstukken splitsen
 home.splitPdfByChapters.desc=Splits een PDF op basis van zijn hoofdstukstructuur in meerdere bestanden.
 splitPdfByChapters.tags=splitsen, hoofdstukken, bookmarks, organiseren

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Kleur-instellingen voor PDF's
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Metadata inclusief: Als gecijfeld, de originele PDF's met
 splitByChapters.desc.4=Dubbele items toestaan: Als gecijfeld, zorgen multiple boekmarkeersymboolen op dezelfde pagina voor het maken van aparte PDF-bestanden.
 splitByChapters.submit=PDF splitsen

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_no_NB.properties
+++ b/src/main/resources/messages_no_NB.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_pl_PL.properties
+++ b/src/main/resources/messages_pl_PL.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Podziel PDF według rozdziałów
 home.splitPdfByChapters.desc=Podział pliku PDF na wiele plików na podstawie struktury rozdziałów.
 splitPdfByChapters.tags=podział, rozdziały, zakładki, porządkowanie, organizacja

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Zamień-Odwróć-Kolor
 replace-color.header=Zamień-Odwróć kolor PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Dołącz Metadane: Jeśli opcja ta jest zaznaczona, metad
 splitByChapters.desc.4=Zezwól na Duplikaty: Jeśli ta opcja jest zaznaczona, pozwala na tworzenie oddzielnych plików PDF przez wiele zakładek na tej samej stronie.
 splitByChapters.submit=Podziel PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_pt_BR.properties
+++ b/src/main/resources/messages_pt_BR.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Divide PDF por Capítulos
 home.splitPdfByChapters.desc=Divide um PDF em vários arquivos baseado na sua estrutura de capítulos.
 splitPdfByChapters.tags=dividir,capítulos,favoritos,organizar

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Substituir-Inverter-Cor
 replace-color.header=Substitui-Inverter Cor PDF
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Selecione PDF para adicionar a marca d'água:
 watermark.selectText.2=Texto da marca d'água:
 watermark.selectText.3=Tamanho da fonte:
 watermark.selectText.4=Rotação (0-360):
-watermark.selectText.5=widthSpacer (Espaço entre cada marca d'água horizontalmente):
-watermark.selectText.6=heightSpacer (Espaço entre cada marca d'água verticalmente):
+watermark.selectText.5=Width Spacer (Espaço entre cada marca d'água horizontalmente):
+watermark.selectText.6=Height Spacer (Espaço entre cada marca d'água verticalmente):
 watermark.selectText.7=Opacidade (0% - 100%):
 watermark.selectText.8=Tipo de marca d'água:
 watermark.selectText.9=Imagem da marca d'água:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Incluir Metadados: Se marcado, os metadados do PDF origin
 splitByChapters.desc.4=Permitir Cópias: Se marcado, habilita vários marcadores na mesma página para criar PDFs separados.
 splitByChapters.submit=Dividir PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_pt_PT.properties
+++ b/src/main/resources/messages_pt_PT.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Dividir PDF por Capítulos
 home.splitPdfByChapters.desc=Divida um PDF em vários arquivos com base na estrutura dos capítulos.
 splitPdfByChapters.tags=dividir,capítulos,marcadores,organizar

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Substituir-Inverter Cor do PDF
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Seleccione o PDF para Adicionar a Marca d'Água
 watermark.selectText.2=Texto da Marca d'Água
 watermark.selectText.3=Tamanho da Fonte
 watermark.selectText.4=Rotação (0-360)
-watermark.selectText.5=Espaçamento Horizontal (widthSpacer)
-watermark.selectText.6=Espaçamento Vertical (heightSpacer)
+watermark.selectText.5=Espaçamento Horizontal (Width Spacer)
+watermark.selectText.6=Espaçamento Vertical (Height Spacer)
 watermark.selectText.7=Opacidade (0% - 100%)
 watermark.selectText.8=Tipo de Marca d'Água
 watermark.selectText.9=Imagem da Marca d'Água
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Inclua Metadados: Se marcado, os metadados originais do P
 splitByChapters.desc.4=Permitir Duplicatas: Se marcado, permite a criação de vários bookmarks na mesma página para criar separadamente vários PDFs.
 splitByChapters.submit=Dividir o PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_ro_RO.properties
+++ b/src/main/resources/messages_ro_RO.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_ru_RU.properties
+++ b/src/main/resources/messages_ru_RU.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Разделить PDF по разделам
 home.splitPdfByChapters.desc=Разделите PDF на несколько файлов на основе структуры его разделов
 splitPdfByChapters.tags=разделение, разделы, закладки, организация

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Заменить-Обратное изменение цвета PDF
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Выберите PDF, чтобы добавить вод
 watermark.selectText.2=Текст водяного знака:
 watermark.selectText.3=Размер шрифта:
 watermark.selectText.4=Поворот (0-360):
-watermark.selectText.5=widthSpacer (пробел между каждым водяным знаком по горизонтали):
-watermark.selectText.6=heightSpacer (пробел между каждым водяным знаком по вертикали):
+watermark.selectText.5=Width Spacer (пробел между каждым водяным знаком по горизонтали):
+watermark.selectText.6=Height Spacer (пробел между каждым водяным знаком по вертикали):
 watermark.selectText.7=Непрозрачность (0% - 100%):
 watermark.selectText.8=Тип водяного знака:
 watermark.selectText.9=Изображение водяного знака:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Включить метаданные: если эта о
 splitByChapters.desc.4=Позволять дубликаты: если эта опция отмечена, на одной странице могут быть созданы несколько PDF из-за нескольких одинаковых закладок.
 splitByChapters.submit=Разделить PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_sk_SK.properties
+++ b/src/main/resources/messages_sk_SK.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_sr_LATN_RS.properties
+++ b/src/main/resources/messages_sr_LATN_RS.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_sv_SE.properties
+++ b/src/main/resources/messages_sv_SE.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Dela upp PDF efter kapitel
 home.splitPdfByChapters.desc=Dela upp en PDF till flera filer baserat på dess kapitelstruktur.
 splitPdfByChapters.tags=dela,kapitel,bokmärken,organisera

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Ersätt-Invertera färg på PDF
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Välj PDF för att lägga till vattenstämpel till:
 watermark.selectText.2=Vattenmärkestext:
 watermark.selectText.3=Teckenstorlek:
 watermark.selectText.4=Vändning (0-360):
-watermark.selectText.5=widthSpacer (mellanrum mellan varje vattenstämpel horisontellt):
-watermark.selectText.6=heightSpacer (mellanrum mellan varje vattenstämpel vertikalt):
+watermark.selectText.5=Width Spacer (mellanrum mellan varje vattenstämpel horisontellt):
+watermark.selectText.6=Height Spacer (mellanrum mellan varje vattenstämpel vertikalt):
 watermark.selectText.7=Opacitet (0% - 100%):
 watermark.selectText.8=Vattenstämpeltyp:
 watermark.selectText.9=Vattenstämpelbild:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Tillåt duplicieringar: Om kryssrutan är markerad tillåts flera bokmärken på samma sida skapa individuella PDF:er.
 splitByChapters.submit=Dela upp PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_th_TH.properties
+++ b/src/main/resources/messages_th_TH.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=รวมข้อมูลเสริม: หากถ
 splitByChapters.desc.4=อนุญาตให้มีการซ้ำ: หากถูกเลือก จะทำให้สามารถสร้างไฟล์ PDF แยกออกมาจากหน้าเดียวกันได้หลายรายการ
 splitByChapters.submit=แบ่งไฟล์ PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_tr_TR.properties
+++ b/src/main/resources/messages_tr_TR.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_uk_UA.properties
+++ b/src/main/resources/messages_uk_UA.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1056,8 +1060,8 @@ watermark.selectText.1=Виберіть PDF, щоб додати водяний
 watermark.selectText.2=Текст водяного знаку:
 watermark.selectText.3=Розмір шрифту:
 watermark.selectText.4=Обертання (0-360):
-watermark.selectText.5=widthSpacer (проміжок між кожним водяним знаком по горизонталі):
-watermark.selectText.6=heightSpacer (проміжок між кожним водяним знаком по вертикалі):
+watermark.selectText.5=Width Spacer (проміжок між кожним водяним знаком по горизонталі):
+watermark.selectText.6=Height Spacer (проміжок між кожним водяним знаком по вертикалі):
 watermark.selectText.7=Непрозорість (0% - 100%):
 watermark.selectText.8=Тип водяного знаку:
 watermark.selectText.9=Зображення водяного знаку:
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_vi_VN.properties
+++ b/src/main/resources/messages_vi_VN.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_zh_CN.properties
+++ b/src/main/resources/messages_zh_CN.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=Split PDF by Chapters
 home.splitPdfByChapters.desc=Split a PDF into multiple files based on its chapter structure.
 splitPdfByChapters.tags=split,chapters,bookmarks,organize

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=Replace-Invert-Color
 replace-color.header=Replace-Invert Color PDF
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/messages_zh_TW.properties
+++ b/src/main/resources/messages_zh_TW.properties
@@ -512,6 +512,10 @@ home.splitPdfByChapters.title=依章節分割 PDF
 home.splitPdfByChapters.desc=根據 PDF 的章節結構將其分割成多個檔案。
 splitPdfByChapters.tags=分割,章節,書籤,整理

+home.validateSignature.title=Validate PDF Signature
+home.validateSignature.desc=Verify digital signatures and certificates in PDF documents
+validateSignature.tags=signature,verify,validate,pdf,certificate,digital signature,Validate Signature,Validate certificate
+
 #replace-invert-color
 replace-color.title=取代-反轉顏色
 replace-color.header=取代-反轉 PDF 顏色
@@ -1056,8 +1060,8 @@ watermark.selectText.1=選擇要新增浮水印的 PDF：
 watermark.selectText.2=浮水印文字：
 watermark.selectText.3=字型大小：
 watermark.selectText.4=旋轉（0-360）：
-watermark.selectText.5=widthSpacer（每個浮水印之間的水平間距）：
-watermark.selectText.6=heightSpacer（每個浮水印之間的垂直間距）：
+watermark.selectText.5=Width Spacer（每個浮水印之間的水平間距）：
+watermark.selectText.6=Height Spacer（每個浮水印之間的垂直間距）：
 watermark.selectText.7=不透明度（0% - 100%）：
 watermark.selectText.8=浮水印類型：
 watermark.selectText.9=浮水印影像：
@@ -1263,6 +1267,11 @@ splitByChapters.desc.3=包含中繼資料：如果勾選，原始 PDF 的中繼
 splitByChapters.desc.4=允許重複：如果勾選，允許同一頁面上的多個書籤建立獨立的 PDF。
 splitByChapters.submit=分割 PDF

+#File Chooser
+fileChooser.click=Click
+fileChooser.or=or
+fileChooser.dragAndDrop=Drag & Drop
+fileChooser.hoveredDragAndDrop=Drag & Drop file(s) here

 #release notes
 releases.footer=Releases
@@ -1270,3 +1279,39 @@ releases.title=Release Notes
 releases.header=Release Notes
 releases.current.version=Current Release
 releases.note=Release notes are only available in English
+
+#Validate Signature
+#Validate Signature
+validateSignature.title=Validate PDF Signatures
+validateSignature.header=Validate Digital Signatures
+validateSignature.selectPDF=Select signed PDF file
+validateSignature.submit=Validate Signatures
+validateSignature.results=Validation Results
+validateSignature.status=Status
+validateSignature.signer=Signer
+validateSignature.date=Date
+validateSignature.reason=Reason
+validateSignature.location=Location
+validateSignature.noSignatures=No digital signatures found in this document
+validateSignature.status.valid=Valid
+validateSignature.status.invalid=Invalid
+validateSignature.chain.invalid=Certificate chain validation failed - cannot verify signer's identity
+validateSignature.trust.invalid=Certificate not in trust store - source cannot be verified
+validateSignature.cert.expired=Certificate has expired
+validateSignature.cert.revoked=Certificate has been revoked
+validateSignature.signature.info=Signature Information
+validateSignature.signature=Signature
+validateSignature.signature.mathValid=Signature is mathematically valid BUT:
+validateSignature.selectCustomCert=Custom Certificate File X.509 (Optional)
+validateSignature.cert.info=Certificate Details
+validateSignature.cert.issuer=Issuer
+validateSignature.cert.subject=Subject
+validateSignature.cert.serialNumber=Serial Number
+validateSignature.cert.validFrom=Valid From
+validateSignature.cert.validUntil=Valid Until
+validateSignature.cert.algorithm=Algorithm
+validateSignature.cert.keySize=Key Size
+validateSignature.cert.version=Version
+validateSignature.cert.keyUsage=Key Usage
+validateSignature.cert.selfSigned=Self-Signed
+validateSignature.cert.bits=bits
--- a/src/main/resources/static/3rdPartyLicenses.json
+++ b/src/main/resources/static/3rdPartyLicenses.json
@@ -1386,6 +1386,13 @@
            "moduleLicense": "Apache License, Version 2.0",
            "moduleLicenseUrl": "https://www.apache.org/licenses/LICENSE-2.0"
        },
+        {
+            "moduleName": "org.springframework.session:spring-session-core",
+            "moduleUrl": "https://spring.io/projects/spring-session",
+            "moduleVersion": "3.4.0",
+            "moduleLicense": "Apache License, Version 2.0",
+            "moduleLicenseUrl": "https://www.apache.org/licenses/LICENSE-2.0"
+        },
        {
            "moduleName": "org.springframework:spring-aop",
            "moduleUrl": "https://github.com/spring-projects/spring-framework",
--- a/src/main/resources/static/css/fileSelect.css
+++ b/src/main/resources/static/css/fileSelect.css
@@ -1,10 +1,221 @@
+.custom-file-chooser {
+  display: flex;
+  flex-direction: column;
+  position: relative;
+
+  min-height: 55px;
+  border-radius: 1rem;
+  --selected-files-display: none;
+}
+
+.input-container {
+  position: relative;
+  border-radius: 1rem;
+  border: 1px dashed rgb(105, 116, 134);
+
+  column-gap: 7px;
+  row-gap: 7px;
+  height: 150px;
+  width: 100%;
+
+  --overlay-display: none;
+  transition: background-color 0.5s linear;
+}
+
+.input-container:hover {
+  outline: none;
+  border: none;
+  background-color: var(--md-sys-color-surface-container-low);
+
+ -webkit-transition:  box-shadow 1s ease, background-color 2s linear;
+ -moz-transition:  box-shadow 1s ease, background-color 2s linear;
+ -o-transition:  box-shadow 1s ease, background-color 2s linear;
+ -ms-transition: box-shadow 1s ease, background-color 2s linear;
+ transition: box-shadow 1s ease, background-color 2s linear;
+
+ box-shadow: 0 0 10px rgb(105, 116, 134);
+ cursor: pointer;
+}
+
+.input-container * {
+  user-select: none;
+  pointer-events: none;
+}
+
+
+.input-container::before {
+  display: var(--overlay-display);
+  position: absolute;
+
+  content: '';
+
+  top: 0;
+  left: 0;
+
+  height: 100%;
+  width: 100%;
+
+  background-color: var(--md-sys-color-surface);
+  z-index: 1;
+
+  white-space: pre;
+  border-radius: 1rem;
+}
+
+.input-container::after {
+  display: var(--overlay-display);
+  position: absolute;
+
+  content: attr(data-text);
+  font-size: 0.9rem;
+  font-weight: 550;
+  color: var(--md-sys-color-on-surface);
+
+  background-color: transparent;
+
+  min-width: 150px;
+
+  top: 50%;
+  left: 50%;
+
+  transform: translateX(-50%) translateY(-50%);
+  text-align: center;
+
+  z-index: 2;
+}
+
+.input-container input[type="file"] {
+  display: none;
+}
+
+.input-container div:nth-of-type(2) {
+  color: var(--md-sys-color-on-surface);
+}
+
+.input-container div:nth-of-type(1), .input-container div:nth-of-type(3) {
+  color: var(--md-sys-color-on-surface);
+  font-size: 16px;
+  font-weight: bold;
+}
+
+.file-input-btn {
+  display: inline-block;
+
+  border: 1px solid #ccc;
+  padding: 6px 12px;
+  cursor: pointer;
+
+  color: #212529;
+  font-size: 1rem;
+  border-radius: 3rem;
+
+  background-color: #DDE0E3;
+}
+
+.small-file-container {
+  padding-top: 1px;
+  position: relative;
+  row-gap: 1px;
+  height: 60px;
+  width: 60px;
+}
+
+.file-icon {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 30px;
+  width: 30px;
+}
+
+.file-icon * {
+  height: inherit;
+  width: inherit;
+}
+
+.file-info {
+  min-width: 0;
+}
+
+.file-info > div:nth-child(1) {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  color: var(--md-sys-color-on-surface);
+
+  max-width: 60px;
+  font-size: 0.75rem;
+}
+
+.file-info > div:nth-child(2) {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  color: grey;
+
+  max-width: 60px;
+  font-size: 10px;
+}
+
+.remove-selected-file {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+
+  position: absolute;
+  height: 15px;
+  width: 15px;
+
+  right: 10px;
+  top: -5px;
+}
+
+.remove-selected-file * {
+  overflow: hidden;
+  height: inherit;
+  width: inherit;
+  z-index: 3;
+  pointer-events: none;
+  user-select: none;
+}
+
+.remove-selected-file:after {
+  content: '';
+  position: absolute;
+
+  left: 1;
+
+  width: 10px;
+  height: 10px;
+  border-radius: 50%;
+
+  background-color: white;
+  z-index: 2;
+
+  user-select: none;
+  pointer-events: none;
+}
+
+.remove-selected-file:hover {
+  cursor: pointer;
+}
+
 .custom-file-label {
  padding-right: 90px;
 }

 .selected-files {
-  margin-top: 10px;
-  max-height: 150px;
-  overflow-y: auto;
+  display: var(--selected-files-display);
+  padding-left: 5px;
+  padding-right: 3px;
+  padding-top: 15px;
+  padding-bottom: 15px;
+
+  flex: 1;
  white-space: pre-wrap;
+
+  row-gap: 12px;
+  column-gap: 5px;
+
+  border-radius: 1rem;
+  border: 1px solid rgb(105, 116, 134, 0.5);
 }
--- a/src/main/resources/static/js/downloader.js
+++ b/src/main/resources/static/js/downloader.js
@@ -1,26 +1,36 @@
-(function() {
+(function () {
+  if (window.isDownloadScriptInitialized) return; // Prevent re-execution
+  window.isDownloadScriptInitialized = true;

-  const { pdfPasswordPrompt, multipleInputsForSingleRequest, disableMultipleFiles, remoteCall, sessionExpired, refreshPage, error } = window.stirlingPDF;
+  const {
+    pdfPasswordPrompt,
+    multipleInputsForSingleRequest,
+    disableMultipleFiles,
+    remoteCall,
+    sessionExpired,
+    refreshPage,
+    error,
+  } = window.stirlingPDF;

  function showErrorBanner(message, stackTrace) {
-    const errorContainer = document.getElementById("errorContainer");
-    errorContainer.style.display = "block"; // Display the banner
-    errorContainer.querySelector(".alert-heading").textContent = error;
-    errorContainer.querySelector("p").textContent = message;
-    document.querySelector("#traceContent").textContent = stackTrace;
+    const errorContainer = document.getElementById('errorContainer');
+    errorContainer.style.display = 'block'; // Display the banner
+    errorContainer.querySelector('.alert-heading').textContent = error;
+    errorContainer.querySelector('p').textContent = message;
+    document.querySelector('#traceContent').textContent = stackTrace;
  }

  function showSessionExpiredPrompt() {
-    const errorContainer = document.getElementById("errorContainer");
-    errorContainer.style.display = "block";
-    errorContainer.querySelector(".alert-heading").textContent = sessionExpired;
-    errorContainer.querySelector("p").textContent = sessionExpired;
-    document.querySelector("#traceContent").textContent = "";
+    const errorContainer = document.getElementById('errorContainer');
+    errorContainer.style.display = 'block';
+    errorContainer.querySelector('.alert-heading').textContent = sessionExpired;
+    errorContainer.querySelector('p').textContent = sessionExpired;
+    document.querySelector('#traceContent').textContent = '';

    // Optional: Add a refresh button
-    const refreshButton = document.createElement("button");
+    const refreshButton = document.createElement('button');
    refreshButton.textContent = refreshPage;
-    refreshButton.className = "btn btn-primary mt-3";
+    refreshButton.className = 'btn btn-primary mt-3';
    refreshButton.onclick = () => location.reload();
    errorContainer.appendChild(refreshButton);
  }
@@ -28,19 +38,19 @@
  let firstErrorOccurred = false;

  $(document).ready(function () {
-    $("form").submit(async function (event) {
+    $('form').submit(async function (event) {
      event.preventDefault();
      firstErrorOccurred = false;
      const url = this.action;
-      const files = $("#fileInput-input")[0].files;
+      const files = $('#fileInput-input')[0].files;
      const formData = new FormData(this);
-      const submitButton = document.getElementById("submitBtn");
-      const showGameBtn = document.getElementById("show-game-btn");
+      const submitButton = document.getElementById('submitBtn');
+      const showGameBtn = document.getElementById('show-game-btn');
      const originalButtonText = submitButton.textContent;
-      var boredWaiting = localStorage.getItem("boredWaiting") || "disabled";
+      var boredWaiting = localStorage.getItem('boredWaiting') || 'disabled';

      if (showGameBtn) {
-        showGameBtn.style.display = "none";
+        showGameBtn.style.display = 'none';
      }

      // Remove empty file entries
@@ -49,58 +59,60 @@
          formData.delete(key);
        }
      }
-      const override = $("#override").val() || "";
+      const override = $('#override').val() || '';
      console.log(override);

      // Set a timeout to show the game button if operation takes more than 5 seconds
      const timeoutId = setTimeout(() => {
-        if (boredWaiting === "enabled" && showGameBtn) {
-          showGameBtn.style.display = "block";
+        if (boredWaiting === 'enabled' && showGameBtn) {
+          showGameBtn.style.display = 'block';
          showGameBtn.parentNode.insertBefore(document.createElement('br'), showGameBtn.nextSibling);
        }
      }, 5000);

      try {
-        submitButton.textContent = "Processing...";
+        submitButton.textContent = 'Processing...';
        submitButton.disabled = true;

        if (remoteCall === true) {
-          if (override === "multi" || (!multipleInputsForSingleRequest && files.length > 1 && override !== "single")) {
+          if (override === 'multi' || (!multipleInputsForSingleRequest && files.length > 1 && override !== 'single')) {
            await submitMultiPdfForm(url, files);
          } else {
            await handleSingleDownload(url, formData);
          }
        }

-
-        clearFileInput();
+        //clearFileInput();
        clearTimeout(timeoutId);
        if (showGameBtn) {
-          showGameBtn.style.display = "none";
-          showGameBtn.style.marginTop = "";
+          showGameBtn.style.display = 'none';
+          showGameBtn.style.marginTop = '';
        }
        submitButton.textContent = originalButtonText;
        submitButton.disabled = false;

        // After process finishes, check for boredWaiting and gameDialog open status
        const gameDialog = document.getElementById('game-container-wrapper');
-        if (boredWaiting === "enabled" && gameDialog && gameDialog.open) {
+        if (boredWaiting === 'enabled' && gameDialog && gameDialog.open) {
          // Display a green banner at the bottom of the screen saying "Download complete"
-          let downloadCompleteText = "Download Complete";
-          if(window.downloadCompleteText){
+          let downloadCompleteText = 'Download Complete';
+          if (window.downloadCompleteText) {
            downloadCompleteText = window.downloadCompleteText;
          }
-          $("body").append('<div id="download-complete-banner" style="position:fixed;bottom:0;left:0;width:100%;background-color:green;color:white;text-align:center;padding:10px;font-size:16px;z-index:1000;">'+ downloadCompleteText + '</div>');
-          setTimeout(function() {
-            $("#download-complete-banner").fadeOut("slow", function() {
+          $('body').append(
+            '<div id="download-complete-banner" style="position:fixed;bottom:0;left:0;width:100%;background-color:green;color:white;text-align:center;padding:10px;font-size:16px;z-index:1000;">' +
+              downloadCompleteText +
+              '</div>'
+          );
+          setTimeout(function () {
+            $('#download-complete-banner').fadeOut('slow', function () {
              $(this).remove(); // Remove the banner after fading out
            });
          }, 5000); // Banner will fade out after 5 seconds
        }
-
      } catch (error) {
        clearTimeout(timeoutId);
-        showGameBtn.style.display = "none";
+        showGameBtn.style.display = 'none';
        submitButton.textContent = originalButtonText;
        submitButton.disabled = false;
        handleDownloadError(error);
@@ -112,8 +124,8 @@
  async function getPDFPageCount(file) {
    try {
      const arrayBuffer = await file.arrayBuffer();
-      pdfjsLib.GlobalWorkerOptions.workerSrc = '/pdfjs-legacy/pdf.worker.mjs'
-      const pdf = await pdfjsLib.getDocument({ data: arrayBuffer }).promise;
+      pdfjsLib.GlobalWorkerOptions.workerSrc = '/pdfjs-legacy/pdf.worker.mjs';
+      const pdf = await pdfjsLib.getDocument({data: arrayBuffer}).promise;
      return pdf.numPages;
    } catch (error) {
      console.error('Error getting PDF page count:', error);
@@ -128,8 +140,8 @@
    let errorMessage = null;

    try {
-      const response = await fetch(url, { method: "POST", body: formData });
-      const contentType = response.headers.get("content-type");
+      const response = await fetch(url, {method: 'POST', body: formData});
+      const contentType = response.headers.get('content-type');

      if (!response.ok) {
        errorMessage = response.status;
@@ -137,58 +149,57 @@
          showSessionExpiredPrompt();
          return;
        }
-        if (contentType && contentType.includes("application/json")) {
-          console.error("Throwing error banner, response was not okay");
+        if (contentType && contentType.includes('application/json')) {
+          console.error('Throwing error banner, response was not okay');
          return handleJsonResponse(response);
        }
        throw new Error(`HTTP error! status: ${response.status}`);
      }

-      const contentDisposition = response.headers.get("Content-Disposition");
+      const contentDisposition = response.headers.get('Content-Disposition');
      let filename = getFilenameFromContentDisposition(contentDisposition);

      const blob = await response.blob();
      success = true;

-      if (contentType.includes("application/pdf") || contentType.includes("image/")) {
-        clearFileInput();
+      if (contentType.includes('application/pdf') || contentType.includes('image/')) {
+        //clearFileInput();
        return handleResponse(blob, filename, !isMulti, isZip);
      } else {
-        clearFileInput();
+        //clearFileInput();
        return handleResponse(blob, filename, false, isZip);
      }
-
    } catch (error) {
      success = false;
      errorMessage = error.message;
-      console.error("Error in handleSingleDownload:", error);
+      console.error('Error in handleSingleDownload:', error);
      throw error;
    } finally {
      const processingTime = performance.now() - startTime;

      // Capture analytics
      const pageCount = file && file.type === 'application/pdf' ? await getPDFPageCount(file) : null;
-      if(analyticsEnabled) {
+      if (analyticsEnabled) {
        posthog.capture('file_processing', {
          success: success,
          file_type: file ? file.type || 'unknown' : 'unknown',
          file_size: file ? file.size : 0,
          processing_time: processingTime,
          error_message: errorMessage,
-          pdf_pages: pageCount
+          pdf_pages: pageCount,
        });
      }
    }
  }

-   function getFilenameFromContentDisposition(contentDisposition) {
+  function getFilenameFromContentDisposition(contentDisposition) {
    let filename;

-    if (contentDisposition && contentDisposition.indexOf("attachment") !== -1) {
-      filename = decodeURIComponent(contentDisposition.split("filename=")[1].replace(/"/g, "")).trim();
+    if (contentDisposition && contentDisposition.indexOf('attachment') !== -1) {
+      filename = decodeURIComponent(contentDisposition.split('filename=')[1].replace(/"/g, '')).trim();
    } else {
      // If the Content-Disposition header is not present or does not contain the filename, use a default filename
-      filename = "download";
+      filename = 'download';
    }

    return filename;
@@ -198,37 +209,37 @@
    const json = await response.json();
    const errorMessage = JSON.stringify(json, null, 2);
    if (
-      errorMessage.toLowerCase().includes("the password is incorrect") ||
-      errorMessage.toLowerCase().includes("Password is not provided") ||
-      errorMessage.toLowerCase().includes("PDF contains an encryption dictionary")
+      errorMessage.toLowerCase().includes('the password is incorrect') ||
+      errorMessage.toLowerCase().includes('Password is not provided') ||
+      errorMessage.toLowerCase().includes('PDF contains an encryption dictionary')
    ) {
      if (!firstErrorOccurred) {
        firstErrorOccurred = true;
        alert(pdfPasswordPrompt);
      }
    } else {
-      showErrorBanner(json.error + ":" + json.message, json.trace);
+      showErrorBanner(json.error + ':' + json.message, json.trace);
    }
  }

  async function handleResponse(blob, filename, considerViewOptions = false, isZip = false) {
    if (!blob) return;
-    const downloadOption = localStorage.getItem("downloadOption");
+    const downloadOption = localStorage.getItem('downloadOption');
    if (considerViewOptions) {
-      if (downloadOption === "sameWindow") {
+      if (downloadOption === 'sameWindow') {
        const url = URL.createObjectURL(blob);
        window.location.href = url;
        return;
-      } else if (downloadOption === "newWindow") {
+      } else if (downloadOption === 'newWindow') {
        const url = URL.createObjectURL(blob);
-        window.open(url, "_blank");
+        window.open(url, '_blank');
        return;
      }
    }
    if (!isZip) {
      downloadFile(blob, filename);
    }
-    return { filename, blob };
+    return {filename, blob};
  }

  function handleDownloadError(error) {
@@ -240,32 +251,32 @@

  function downloadFile(blob, filename) {
    if (!(blob instanceof Blob)) {
-      console.error("Invalid blob passed to downloadFile function");
+      console.error('Invalid blob passed to downloadFile function');
      return;
    }
    const url = URL.createObjectURL(blob);
-    const a = document.createElement("a");
+    const a = document.createElement('a');
    a.href = url;
    a.download = filename;
    a.click();
    urls.push(url); // Store the URL so it doesn't get garbage collected too soon

-    return { filename, blob };
+    return {filename, blob};
  }

  async function submitMultiPdfForm(url, files) {
-    const zipThreshold = parseInt(localStorage.getItem("zipThreshold"), 10) || 4;
+    const zipThreshold = parseInt(localStorage.getItem('zipThreshold'), 10) || 4;
    const zipFiles = files.length > zipThreshold;
    let jszip = null;
    // Add Space below Progress Bar before Showing
    $('.progressBarContainer').after($('<br>'));
-    $(".progressBarContainer").show();
+    $('.progressBarContainer').show();
    // Initialize the progress bar

-    let progressBar = $(".progressBar");
-    progressBar.css("width", "0%");
-    progressBar.attr("aria-valuenow", 0);
-    progressBar.attr("aria-valuemax", files.length);
+    let progressBar = $('.progressBar');
+    progressBar.css('width', '0%');
+    progressBar.attr('aria-valuenow', 0);
+    progressBar.attr('aria-valuemax', files.length);

    if (zipFiles) {
      jszip = new JSZip();
@@ -279,10 +290,10 @@
    if (postForm) {
      formData = new FormData($(postForm)[0]); // Convert the form to a jQuery object and get the raw DOM element
    } else {
-      console.log("No form with POST method found.");
+      console.log('No form with POST method found.');
    }
    //Remove file to reuse parameters for other runs
-    formData.delete("fileInput");
+    formData.delete('fileInput');
    // Remove empty file entries
    for (let [key, value] of formData.entries()) {
      if (value instanceof File && !value.name) {
@@ -298,12 +309,12 @@
    for (const chunk of chunks) {
      const promises = chunk.map(async (file) => {
        let fileFormData = new FormData();
-        fileFormData.append("fileInput", file);
+        fileFormData.append('fileInput', file);
        console.log(fileFormData);
        // Add other form data
        for (let pair of formData.entries()) {
          fileFormData.append(pair[0], pair[1]);
-          console.log(pair[0] + ", " + pair[1]);
+          console.log(pair[0] + ', ' + pair[1]);
        }

        try {
@@ -325,47 +336,47 @@

    if (zipFiles) {
      try {
-        const content = await jszip.generateAsync({ type: "blob" });
-        downloadFile(content, "files.zip");
+        const content = await jszip.generateAsync({type: 'blob'});
+        downloadFile(content, 'files.zip');
      } catch (error) {
-        console.error("Error generating ZIP file: " + error);
+        console.error('Error generating ZIP file: ' + error);
      }
    }
-    progressBar.css("width", "100%");
-    progressBar.attr("aria-valuenow", Array.from(files).length);
+    progressBar.css('width', '100%');
+    progressBar.attr('aria-valuenow', Array.from(files).length);
  }

  function updateProgressBar(progressBar, files) {
-    let progress = (progressBar.attr("aria-valuenow") / files.length) * 100 + 100 / files.length;
-    progressBar.css("width", progress + "%");
-    progressBar.attr("aria-valuenow", parseInt(progressBar.attr("aria-valuenow")) + 1);
+    let progress = (progressBar.attr('aria-valuenow') / files.length) * 100 + 100 / files.length;
+    progressBar.css('width', progress + '%');
+    progressBar.attr('aria-valuenow', parseInt(progressBar.attr('aria-valuenow')) + 1);
  }
-  window.addEventListener("unload", () => {
+  window.addEventListener('unload', () => {
    for (const url of urls) {
      URL.revokeObjectURL(url);
    }
  });

  // Clear file input after job
-  function clearFileInput(){
+  function clearFileInput() {
    let pathname = document.location.pathname;
-    if(pathname != "/merge-pdfs"){
-      let formElement = document.querySelector("#fileInput-input");
+    if (pathname != '/merge-pdfs') {
+      let formElement = document.querySelector('#fileInput-input');
      formElement.value = '';
-      let editSectionElement = document.querySelector("#editSection");
-      if(editSectionElement){
-        editSectionElement.style.display = "none";
+      let editSectionElement = document.querySelector('#editSection');
+      if (editSectionElement) {
+        editSectionElement.style.display = 'none';
      }
-      let cropPdfCanvas = document.querySelector("#cropPdfCanvas");
-      let overlayCanvas = document.querySelector("#overlayCanvas");
-      if(cropPdfCanvas && overlayCanvas){
+      let cropPdfCanvas = document.querySelector('#cropPdfCanvas');
+      let overlayCanvas = document.querySelector('#overlayCanvas');
+      if (cropPdfCanvas && overlayCanvas) {
        cropPdfCanvas.width = 0;
        cropPdfCanvas.height = 0;

        overlayCanvas.width = 0;
        overlayCanvas.height = 0;
      }
-    } else{
+    } else {
      console.log("Disabled for 'Merge'");
    }
  }
--- a/src/main/resources/static/js/file-icon-factory.js
+++ b/src/main/resources/static/js/file-icon-factory.js
@@ -0,0 +1,52 @@
+class FileIconFactory {
+  static createFileIcon(fileExtension) {
+    let ext = fileExtension.toLowerCase();
+    switch (ext) {
+      case "pdf":
+        return this.createPDFIcon();
+      case "csv":
+        return this.createCSVIcon();
+      case "jpe":
+      case "jpg":
+      case "jpeg":
+      case "gif":
+      case "png":
+      case "bmp":
+      case "ico":
+      case "svg":
+      case "svgz":
+      case "tif":
+      case "tiff":
+      case "ai":
+      case "drw":
+      case "pct":
+      case "psp":
+      case "xcf":
+      case "psd":
+      case "raw":
+      case "webp":
+      case "heic":
+        return this.createImageIcon();
+      default:
+        return this.createUnknownFileIcon();
+    }
+  }
+
+  static createPDFIcon() {
+    return `
+    <svg xmlns="http://www.w3.org/2000/svg" fill="currentColor" class="bi bi-filetype-pdf" viewBox="0 0 16 16">
+        <path fill-rule="evenodd" d="M14 4.5V14a2 2 0 0 1-2 2h-1v-1h1a1 1 0 0 0 1-1V4.5h-2A1.5 1.5 0 0 1 9.5 3V1H4a1 1 0 0 0-1 1v9H2V2a2 2 0 0 1 2-2h5.5zM1.6 11.85H0v3.999h.791v-1.342h.803q.43 0 .732-.173.305-.175.463-.474a1.4 1.4 0 0 0 .161-.677q0-.375-.158-.677a1.2 1.2 0 0 0-.46-.477q-.3-.18-.732-.179m.545 1.333a.8.8 0 0 1-.085.38.57.57 0 0 1-.238.241.8.8 0 0 1-.375.082H.788V12.48h.66q.327 0 .512.181.185.183.185.522m1.217-1.333v3.999h1.46q.602 0 .998-.237a1.45 1.45 0 0 0 .595-.689q.196-.45.196-1.084 0-.63-.196-1.075a1.43 1.43 0 0 0-.589-.68q-.396-.234-1.005-.234zm.791.645h.563q.371 0 .609.152a.9.9 0 0 1 .354.454q.118.302.118.753a2.3 2.3 0 0 1-.068.592 1.1 1.1 0 0 1-.196.422.8.8 0 0 1-.334.252 1.3 1.3 0 0 1-.483.082h-.563zm3.743 1.763v1.591h-.79V11.85h2.548v.653H7.896v1.117h1.606v.638z"/>
+    </svg>
+      `;
+  }
+
+  static createImageIcon() {
+    return `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 -960 960 960" fill="currentColor"><path d="M216-144q-30 0-51-21.5T144-216v-528q0-29 21-50.5t51-21.5h528q30 0 51 21.5t21 50.5v528q0 29-21 50.5T744-144H216Zm48-144h432L552-480 444-336l-72-96-108 144Z"/></svg>`;
+  }
+
+  static createUnknownFileIcon() {
+    return `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 -960 960 960" fill="currentColor"><path d="M263.72-96Q234-96 213-117.15T192-168v-624q0-29.7 21.15-50.85Q234.3-864 264-864h312l192 192v504q0 29.7-21.16 50.85Q725.68-96 695.96-96H263.72ZM528-624h168L528-792v168Z"/></svg>`;
+  }
+}
+
+export default FileIconFactory;
--- a/src/main/resources/static/js/file-utils.js
+++ b/src/main/resources/static/js/file-utils.js
@@ -0,0 +1,31 @@
+class FileUtils {
+  static extractFileExtension(filename) {
+    if (!filename || filename.trim().length <= 0) return "";
+    let trimmedName = filename.trim();
+    return trimmedName.substring(trimmedName.lastIndexOf(".") + 1);
+  }
+
+  static transformFileSize(size) {
+    if (!size) return `0Bs`;
+    let oneKB = 1024;
+    let oneMB = oneKB * 1024;
+    let oneGB = oneMB * 1024;
+    let oneTB = oneGB * 1024;
+
+    if (size < oneKB) return `${this._toFixed(size)}Bs`;
+    else if (oneKB <= size && size < oneMB) return `${this._toFixed(size / oneKB)}KBs`;
+    else if (oneMB <= size && size < oneGB) return `${this._toFixed(size / oneMB)}MBs`;
+    else if (oneGB <= size && size < oneTB) return `${this._toFixed(size / oneGB)}GBs`;
+    else return `${this._toFixed(size / oneTB)}TBs`;
+  }
+
+  static _toFixed(val, digits = 1) {
+    // Return value without ending 0s after decimal point
+    // Example: if res == 145.0 then return 145, else if 145.x (where x != 0) return 145.x
+    let res = val.toFixed(digits);
+    let resRounded = (res|0);
+    return res == resRounded ? resRounded : res;
+  }
+}
+
+export default FileUtils;
--- a/src/main/resources/static/js/fileInput.js
+++ b/src/main/resources/static/js/fileInput.js
@@ -1,72 +1,92 @@
-document.addEventListener("DOMContentLoaded", function () {
-  document.querySelectorAll(".custom-file-chooser").forEach(setupFileInput);
-});
+import FileIconFactory from "./file-icon-factory.js";
+import FileUtils from "./file-utils.js";
+import UUID from './uuid.js';
+
+let isScriptExecuted = false;
+if (!isScriptExecuted) {
+  isScriptExecuted = true;
+  document.addEventListener("DOMContentLoaded", function () {
+    document.querySelectorAll(".custom-file-chooser").forEach(setupFileInput);
+  });
+}
+

 function setupFileInput(chooser) {
  const elementId = chooser.getAttribute("data-bs-element-id");
  const filesSelected = chooser.getAttribute("data-bs-files-selected");
  const pdfPrompt = chooser.getAttribute("data-bs-pdf-prompt");
+  const inputContainerId = chooser.getAttribute('data-bs-element-container-id');
+
+  let inputContainer = document.getElementById(inputContainerId);

  let allFiles = [];
  let overlay;
  let dragCounter = 0;

+  inputContainer.addEventListener('click', (e) => {
+    let inputBtn = document.getElementById(elementId);
+    inputBtn.click();
+  })
+
  const dragenterListener = function () {
    dragCounter++;
    if (!overlay) {
-      overlay = document.createElement("div");
-      overlay.style.position = "fixed";
-      overlay.style.top = 0;
-      overlay.style.left = 0;
-      overlay.style.width = "100%";
-      overlay.style.height = "100%";
-      overlay.style.background = "rgba(0, 0, 0, 0.5)";
-      overlay.style.color = "#fff";
-      overlay.style.zIndex = "1000";
-      overlay.style.display = "flex";
-      overlay.style.alignItems = "center";
-      overlay.style.justifyContent = "center";
-      overlay.style.pointerEvents = "none";
-      overlay.innerHTML = "<p>Drop files anywhere to upload</p>";
-      document.getElementById("content-wrap").appendChild(overlay);
+      // Show overlay by removing display: none from pseudo elements (::before and ::after)
+      inputContainer.style.setProperty('--overlay-display', "''");
+      overlay = true;
    }
  };

  const dragleaveListener = function () {
    dragCounter--;
    if (dragCounter === 0) {
-      if (overlay) {
-        overlay.remove();
-        overlay = null;
-      }
+      hideOverlay();
    }
  };

+  function hideOverlay() {
+    if (!overlay) return;
+    inputContainer.style.setProperty('--overlay-display', 'none');
+    overlay = false;
+  }
+
  const dropListener = function (e) {
    e.preventDefault();
+    // Drag and Drop shall only affect the target file chooser
+    if (e.target !== inputContainer) {
+      hideOverlay();
+      dragCounter = 0;
+      return;
+    }
+
    const dt = e.dataTransfer;
    const files = dt.files;

-    for (let i = 0; i < files.length; i++) {
-      allFiles.push(files[i]);
+    const fileInput = document.getElementById(elementId);
+    if (fileInput?.hasAttribute("multiple")) {
+      pushFileListTo(files, allFiles);
+    } else if (fileInput) {
+      allFiles = [files[0]];
    }

    const dataTransfer = new DataTransfer();
    allFiles.forEach((file) => dataTransfer.items.add(file));

-    const fileInput = document.getElementById(elementId);
    fileInput.files = dataTransfer.files;

-    if (overlay) {
-      overlay.remove();
-      overlay = null;
-    }
+    hideOverlay();

    dragCounter = 0;

    fileInput.dispatchEvent(new CustomEvent("change", { bubbles: true, detail: {source: 'drag-drop'} }));
  };

+  function pushFileListTo(fileList, container) {
+    for (let file of fileList) {
+      container.push(file);
+    }
+  }
+
  ["dragenter", "dragover", "dragleave", "drop"].forEach((eventName) => {
    document.body.addEventListener(eventName, preventDefaults, false);
  });
@@ -83,16 +103,20 @@ function setupFileInput(chooser) {
  $("#" + elementId).on("change", function (e) {
    let element = e.target;
    const isDragAndDrop = e.detail?.source == 'drag-drop';
-    
+
    if (element instanceof HTMLInputElement && element.hasAttribute("multiple")) {
      allFiles = isDragAndDrop ? allFiles : [... allFiles, ... element.files];
    } else {
      allFiles = Array.from(isDragAndDrop ? allFiles : [element.files[0]]);
    }

+    allFiles = allFiles.map(file => {
+      if (!file.uniqueId) file.uniqueId = UUID.uuidv4();
+      return file;
+    });
+
    if (!isDragAndDrop) {
-        let dataTransfer = new DataTransfer();
-        allFiles.forEach(file => dataTransfer.items.add(file));
+        let dataTransfer = toDataTransfer(allFiles);
        element.files = dataTransfer.files;
    }

@@ -100,28 +124,109 @@ function setupFileInput(chooser) {
    this.dispatchEvent(new CustomEvent("file-input-change", { bubbles: true }));
 });

+  function toDataTransfer(files) {
+    let dataTransfer = new DataTransfer();
+    files.forEach(file => dataTransfer.items.add(file));
+    return dataTransfer;
+  }
+
  function handleFileInputChange(inputElement) {
    const files = allFiles;
-    const fileNames = files.map((f) => f.name);
-    const selectedFilesContainer = $(inputElement).siblings(".selected-files");
+    showOrHideSelectedFilesContainer(files);
+
+    const filesInfo = files.map((f) => ({name: f.name, size: f.size, uniqueId: f.uniqueId}));
+
+    const selectedFilesContainer = $(inputContainer).siblings(".selected-files");
    selectedFilesContainer.empty();
-    fileNames.forEach((fileName) => {
-      selectedFilesContainer.append("<div>" + fileName + "</div>");
+    filesInfo.forEach((info) => {
+      let fileContainerClasses = 'small-file-container d-flex flex-column justify-content-center align-items-center';
+
+      let fileContainer = document.createElement('div');
+      $(fileContainer).addClass(fileContainerClasses);
+      $(fileContainer).attr('id', info.uniqueId);
+
+      let fileIconContainer = createFileIconContainer(info);
+
+      let fileInfoContainer = createFileInfoContainer(info);
+
+      let removeBtn = document.createElement('div');
+      removeBtn.classList.add('remove-selected-file');
+
+      let removeBtnIconHTML = `<svg xmlns="http://www.w3.org/2000/svg" height="20px" viewBox="0 -960 960 960" width="20px" fill="#C02223"><path d="m339-288 141-141 141 141 51-51-141-141 141-141-51-51-141 141-141-141-51 51 141 141-141 141 51 51ZM480-96q-79 0-149-30t-122.5-82.5Q156-261 126-331T96-480q0-80 30-149.5t82.5-122Q261-804 331-834t149-30q80 0 149.5 30t122 82.5Q804-699 834-629.5T864-480q0 79-30 149t-82.5 122.5Q699-156 629.5-126T480-96Z"/></svg>`;
+      $(removeBtn).append(removeBtnIconHTML);
+      $(removeBtn).attr('data-file-id', info.uniqueId).click(removeFileListener);
+
+      $(fileContainer).append(fileIconContainer);
+      $(fileContainer).append(fileInfoContainer);
+      $(fileContainer).append(removeBtn);
+
+      selectedFilesContainer.append(fileContainer);
    });
-    if (fileNames.length === 1) {
-      $(inputElement).siblings(".custom-file-label").addClass("selected").html(fileNames[0]);
-    } else if (fileNames.length > 1) {
-      $(inputElement)
-        .siblings(".custom-file-label")
-        .addClass("selected")
-        .html(fileNames.length + " " + filesSelected);
-    } else {
-      $(inputElement).siblings(".custom-file-label").addClass("selected").html(pdfPrompt);
-    }
+
+    showOrHideSelectedFilesContainer(filesInfo);
  }
+
+  function showOrHideSelectedFilesContainer(files) {
+    if (files && files.length > 0)
+      chooser.style.setProperty('--selected-files-display', 'flex');
+    else
+    chooser.style.setProperty('--selected-files-display', 'none');
+  }
+
+  function removeFileListener(e) {
+    const fileId = (e.target).getAttribute('data-file-id');
+
+    let inputElement = document.getElementById(elementId);
+    removeFileById(fileId, inputElement);
+
+    showOrHideSelectedFilesContainer(allFiles);
+
+    inputElement.dispatchEvent(new CustomEvent("file-input-change", { bubbles: true }));
+  }
+
+  function removeFileById(fileId, inputElement) {
+    let fileContainer = document.getElementById(fileId);
+    fileContainer.remove();
+
+    allFiles = allFiles.filter(v => v.uniqueId != fileId);
+    let dataTransfer = toDataTransfer(allFiles);
+
+    if (inputElement) inputElement.files = dataTransfer.files;
+  }
+
+  function createFileIconContainer(info) {
+    let fileIconContainer = document.createElement('div');
+    fileIconContainer.classList.add('file-icon');
+
+    // Add icon based on the extension
+    let fileExtension = FileUtils.extractFileExtension(info.name);
+    let fileIcon = FileIconFactory.createFileIcon(fileExtension);
+
+    $(fileIconContainer).append(fileIcon);
+    return fileIconContainer;
+  }
+
+  function createFileInfoContainer(info) {
+    let fileInfoContainer = document.createElement("div");
+    let fileInfoContainerClasses = 'file-info d-flex flex-column align-items-center justify-content-center';
+
+    $(fileInfoContainer).addClass(fileInfoContainerClasses);
+
+    $(fileInfoContainer).append(
+      `<div title="${info.name}">${info.name}</div>`
+    );
+    let fileSizeWithUnits = FileUtils.transformFileSize(info.size);
+    $(fileInfoContainer).append(
+      `<div title="${info.size}">${fileSizeWithUnits}</div>`
+    );
+    return fileInfoContainer;
+  }
+
  //Listen for event of file being removed and the filter it out of the allFiles array
  document.addEventListener("fileRemoved", function (e) {
-    const fileName = e.detail;
-    allFiles = allFiles.filter(file => file.name !== fileName);
+    const fileId = e.detail;
+    let inputElement = document.getElementById(elementId);
+    removeFileById(fileId, inputElement);
+    showOrHideSelectedFilesContainer(allFiles);
  });
 }
--- a/src/main/resources/static/js/merge.js
+++ b/src/main/resources/static/js/merge.js
@@ -29,6 +29,7 @@ async function displayFiles(files) {
    // Create filename div and set textContent to sanitize
    const fileNameDiv = document.createElement("div");
    fileNameDiv.className = "filename";
+    fileNameDiv.setAttribute("data-file-id", files[i].uniqueId);
    fileNameDiv.textContent = files[i].name;

    // Create page info div and set textContent to sanitize
@@ -110,11 +111,13 @@ function attachMoveButtons() {
      event.preventDefault();
      var parent = this.closest(".list-group-item");
      //Get name of removed file
-      var fileName = parent.querySelector(".filename").innerText;
+      let filenameNode = parent.querySelector(".filename");
+      var fileName = filenameNode.innerText;
+      const fileId = filenameNode.getAttribute("data-file-id");
      parent.remove();
      updateFiles();
      //Dispatch a custom event with the name of the removed file
-      var event = new CustomEvent("fileRemoved", { detail: fileName });
+      var event = new CustomEvent("fileRemoved", { detail: fileId });
      document.dispatchEvent(event);
    });
  }
--- a/src/main/resources/static/js/multitool/PdfContainer.js
+++ b/src/main/resources/static/js/multitool/PdfContainer.js
@@ -1,8 +1,10 @@
-import { MovePageUpCommand, MovePageDownCommand } from "./commands/move-page.js";
-import { RemoveSelectedCommand } from "./commands/remove.js";
-import { RotateAllCommand, RotateElementCommand } from "./commands/rotate.js";
-import { SplitAllCommand } from "./commands/split.js";
-import { UndoManager } from "./UndoManager.js";
+import {MovePageUpCommand, MovePageDownCommand} from './commands/move-page.js';
+import {RemoveSelectedCommand} from './commands/remove.js';
+import {RotateAllCommand, RotateElementCommand} from './commands/rotate.js';
+import {SplitAllCommand} from './commands/split.js';
+import {UndoManager} from './UndoManager.js';
+import {PageBreakCommand} from './commands/page-break.js';
+import {AddFilesCommand} from './commands/add-page.js';

 class PdfContainer {
  fileName;
@@ -34,7 +36,7 @@ class PdfContainer {
    this.updateSelectedPagesDisplay = this.updateSelectedPagesDisplay.bind(this);
    this.toggleSelectPageVisibility = this.toggleSelectPageVisibility.bind(this);
    this.updatePagesFromCSV = this.updatePagesFromCSV.bind(this);
-    this.addFilesBlankAll = this.addFilesBlankAll.bind(this)
+    this.addFilesBlankAll = this.addFilesBlankAll.bind(this);
    this.removeAllElements = this.removeAllElements.bind(this);
    this.resetPages = this.resetPages.bind(this);

@@ -63,7 +65,7 @@ class PdfContainer {
    window.updatePagesFromCSV = this.updatePagesFromCSV;
    window.updateSelectedPagesDisplay = this.updateSelectedPagesDisplay;
    window.updatePageNumbersAndCheckboxes = this.updatePageNumbersAndCheckboxes;
-    window.addFilesBlankAll = this.addFilesBlankAll
+    window.addFilesBlankAll = this.addFilesBlankAll;
    window.removeAllElements = this.removeAllElements;
    window.resetPages = this.resetPages;

@@ -76,7 +78,7 @@ class PdfContainer {

      undoBtn.disabled = !canUndo;
      redoBtn.disabled = !canRedo;
-    })
+    });

    window.undo = () => {
      if (undoManager.canUndo()) undoManager.undo();
@@ -84,7 +86,7 @@ class PdfContainer {
        undoBtn.disabled = !undoManager.canUndo();
        redoBtn.disabled = !undoManager.canRedo();
      }
-    }
+    };

    window.redo = () => {
      if (undoManager.canRedo()) undoManager.redo();
@@ -92,15 +94,15 @@ class PdfContainer {
        undoBtn.disabled = !undoManager.canUndo();
        redoBtn.disabled = !undoManager.canRedo();
      }
-    }
+    };

-    const filenameInput = document.getElementById("filename-input");
-    const downloadBtn = document.getElementById("export-button");
+    const filenameInput = document.getElementById('filename-input');
+    const downloadBtn = document.getElementById('export-button');

    filenameInput.onkeyup = this.updateFilename;
    filenameInput.onkeydown = this.preventIllegalChars;
    filenameInput.disabled = false;
-    filenameInput.innerText = "";
+    filenameInput.innerText = '';
    downloadBtn.disabled = true;
  }

@@ -128,86 +130,99 @@ class PdfContainer {
    return movePageCommand;
  }

-  addFiles(nextSiblingElement, blank = false) {
-    if (blank) {
+  async addFiles(element) {
+    let addFilesCommand = new AddFilesCommand(
+      element,
+      window.selectedPages,
+      this.addFilesAction.bind(this),
+      this.pagesContainer
+    );

-      this.addFilesBlank(nextSiblingElement);
+    await addFilesCommand.execute();

-    } else {
-      var input = document.createElement("input");
-      input.type = "file";
+    this.undoManager.pushUndoClearRedo(addFilesCommand);
+  }
+
+  async addFilesAction(nextSiblingElement) {
+    let pages = [];
+    return new Promise((resolve) => {
+      var input = document.createElement('input');
+      input.type = 'file';
      input.multiple = true;
-      input.setAttribute("accept", "application/pdf,image/*");
+      input.setAttribute('accept', 'application/pdf,image/*');
+
      input.onchange = async (e) => {
        const files = e.target.files;
-
-        this.addFilesFromFiles(files, nextSiblingElement);
-        this.updateFilename(files ? files[0].name : "");
-        const selectAll = document.getElementById("select-pages-container");
-        selectAll.classList.toggle("hidden", false);
+        if (files.length > 0) {
+          pages = await this.addFilesFromFiles(files, nextSiblingElement, pages);
+          this.updateFilename(files[0].name);
+          const selectAll = document.getElementById('select-pages-container');
+          selectAll.classList.toggle('hidden', false);
+        }
+        resolve(pages);
      };

      input.click();
-    }
-  }
-
-  async addFilesFromFiles(files, nextSiblingElement) {
-    this.fileName = files[0].name;
-    for (var i = 0; i < files.length; i++) {
-      const startTime = Date.now();
-      let processingTime, errorMessage = null, pageCount = 0;
-      try {
-      const file = files[i];
-      if (file.type === "application/pdf") {
-        const { renderer, pdfDocument } = await this.loadFile(file);
-        pageCount = renderer.pageCount || 0;
-        await this.addPdfFile(renderer, pdfDocument, nextSiblingElement);
-      } else if (file.type.startsWith("image/")) {
-        await this.addImageFile(file, nextSiblingElement);
-      }
-      processingTime = Date.now() - startTime;
-      this.captureFileProcessingEvent(true, file, processingTime, null, pageCount);
-    } catch (error) {
-      processingTime = Date.now() - startTime;
-      errorMessage = error.message || "Unknown error";
-      this.captureFileProcessingEvent(false, files[i], processingTime, errorMessage, pageCount);
-    }
-    }
-
-    document.querySelectorAll(".enable-on-file").forEach((element) => {
-      element.disabled = false;
    });
  }

- captureFileProcessingEvent(success, file, processingTime, errorMessage, pageCount) {
-  try{
-  if(analyticsEnabled){
-  posthog.capture('file_processing', {
-    success,
-    file_type: file?.type || 'unknown',
-    file_size: file?.size || 0,
-    processing_time: processingTime,
-    error_message: errorMessage,
-    pdf_pages: pageCount,
-  });
-}
-}catch{
-}
-}
+  async addFilesFromFiles(files, nextSiblingElement, pages) {
+    this.fileName = files[0].name;
+    for (var i = 0; i < files.length; i++) {
+      const startTime = Date.now();
+      let processingTime,
+        errorMessage = null,
+        pageCount = 0;
+      try {
+        const file = files[i];
+        if (file.type === 'application/pdf') {
+          const {renderer, pdfDocument} = await this.loadFile(file);
+          pageCount = renderer.pageCount || 0;
+          pages = await this.addPdfFile(renderer, pdfDocument, nextSiblingElement, pages);
+        } else if (file.type.startsWith('image/')) {
+          pages = await this.addImageFile(file, nextSiblingElement, pages);
+        }
+        processingTime = Date.now() - startTime;
+        this.captureFileProcessingEvent(true, file, processingTime, null, pageCount);
+      } catch (error) {
+        processingTime = Date.now() - startTime;
+        errorMessage = error.message || 'Unknown error';
+        this.captureFileProcessingEvent(false, files[i], processingTime, errorMessage, pageCount);
+      }
+    }

+    document.querySelectorAll('.enable-on-file').forEach((element) => {
+      element.disabled = false;
+    });
+    return pages;
+  }

-  async addFilesBlank(nextSiblingElement) {
+  captureFileProcessingEvent(success, file, processingTime, errorMessage, pageCount) {
+    try {
+      if (analyticsEnabled) {
+        posthog.capture('file_processing', {
+          success,
+          file_type: file?.type || 'unknown',
+          file_size: file?.size || 0,
+          processing_time: processingTime,
+          error_message: errorMessage,
+          pdf_pages: pageCount,
+        });
+      }
+    } catch {}
+  }
+
+  async addFilesBlank(nextSiblingElement, pages) {
    let doc = await PDFLib.PDFDocument.create();
    let docBytes = await doc.save();

-    const url = URL.createObjectURL(new Blob([docBytes], { type: 'application/pdf' }));
+    const url = URL.createObjectURL(new Blob([docBytes], {type: 'application/pdf'}));

    const renderer = await this.toRenderer(url);
-
-    await this.addPdfFile(renderer, doc, nextSiblingElement);
+    pages = await this.addPdfFile(renderer, doc, nextSiblingElement, pages);
+    return pages;
  }

-
  rotateElement(element, deg) {
    let rotateCommand = new RotateElementCommand(element, deg);
    rotateCommand.execute();
@@ -215,37 +230,43 @@ class PdfContainer {
    return rotateCommand;
  }

-  async addPdfFile(renderer, pdfDocument, nextSiblingElement) {
+  async addPdfFile(renderer, pdfDocument, nextSiblingElement, pages) {
    for (var i = 0; i < renderer.pageCount; i++) {
-      const div = document.createElement("div");
+      const div = document.createElement('div');

-      div.classList.add("page-container");
-      div.id = "page-container-" + (i + 1);
-      var img = document.createElement("img");
-      img.classList.add("page-image");
+      div.classList.add('page-container');
+      div.id = 'page-container-' + (i + 1);
+      var img = document.createElement('img');
+      img.classList.add('page-image');
      const imageSrc = await renderer.renderPage(i);
      img.src = imageSrc;
      img.pageIdx = i;
      img.rend = renderer;
      img.doc = pdfDocument;
      div.appendChild(img);
+
      this.pdfAdapters.forEach((adapter) => {
        adapter.adapt?.(div);
      });
+
      if (nextSiblingElement) {
        this.pagesContainer.insertBefore(div, nextSiblingElement);
      } else {
        this.pagesContainer.appendChild(div);
      }
+
+      pages.push(div);
    }
+
+    return pages;
  }

-  async addImageFile(file, nextSiblingElement) {
-    const div = document.createElement("div");
-    div.classList.add("page-container");
+  async addImageFile(file, nextSiblingElement, pages) {
+    const div = document.createElement('div');
+    div.classList.add('page-container');

-    var img = document.createElement("img");
-    img.classList.add("page-image");
+    var img = document.createElement('img');
+    img.classList.add('page-image');
    img.src = URL.createObjectURL(file);
    div.appendChild(img);

@@ -257,17 +278,19 @@ class PdfContainer {
    } else {
      this.pagesContainer.appendChild(div);
    }
+    pages.push(div);
+    return pages;
  }

  async loadFile(file) {
    var objectUrl = URL.createObjectURL(file);
    var pdfDocument = await this.toPdfLib(objectUrl);
    var renderer = await this.toRenderer(objectUrl);
-    return { renderer, pdfDocument };
+    return {renderer, pdfDocument};
  }

  async toRenderer(objectUrl) {
-    pdfjsLib.GlobalWorkerOptions.workerSrc = "./pdfjs-legacy/pdf.worker.mjs";
+    pdfjsLib.GlobalWorkerOptions.workerSrc = './pdfjs-legacy/pdf.worker.mjs';
    const pdf = await pdfjsLib.getDocument(objectUrl).promise;
    return {
      document: pdf,
@@ -275,7 +298,7 @@ class PdfContainer {
      renderPage: async function (pageIdx) {
        const page = await this.document.getPage(pageIdx + 1);

-        const canvas = document.createElement("canvas");
+        const canvas = document.createElement('canvas');

        // set the canvas size to the size of the page
        if (page.rotate == 90 || page.rotate == 270) {
@@ -288,8 +311,8 @@ class PdfContainer {

        // render the page onto the canvas
        var renderContext = {
-          canvasContext: canvas.getContext("2d"),
-          viewport: page.getViewport({ scale: 1 }),
+          canvasContext: canvas.getContext('2d'),
+          viewport: page.getViewport({scale: 1}),
        };

        await page.render(renderContext).promise;
@@ -316,7 +339,7 @@ class PdfContainer {
      //if in page select mode is active rotate only selected pages
      if (window.selectPage && !window.selectedPages.includes(pageIndex)) continue;

-      const img = child.querySelector("img");
+      const img = child.querySelector('img');
      if (!img) continue;

      elementsToRotate.push(img);
@@ -328,12 +351,12 @@ class PdfContainer {
    this.undoManager.pushUndoClearRedo(rotateAllCommand);
  }

-  removeAllElements(){
-    let pageContainerNodeList = document.querySelectorAll(".page-container");
+  removeAllElements() {
+    let pageContainerNodeList = document.querySelectorAll('.page-container');
    for (var i = 0; i < pageContainerNodeList.length; i++) {
      pageContainerNodeList[i].remove();
    }
-    document.querySelectorAll(".enable-on-file").forEach((element) => {
+    document.querySelectorAll('.enable-on-file').forEach((element) => {
      element.disabled = true;
    });
  }
@@ -345,25 +368,24 @@ class PdfContainer {
      window.selectedPages,
      this.updatePageNumbersAndCheckboxes
    );
-
+    removeSelectedCommand.execute();
    this.undoManager.pushUndoClearRedo(removeSelectedCommand);
  }

  toggleSelectAll() {
-    const checkboxes = document.querySelectorAll(".pdf-actions_checkbox");
+    const checkboxes = document.querySelectorAll('.pdf-actions_checkbox');
    window.selectAll = !window.selectAll;
-    const selectIcon = document.getElementById("select-All-Container");
-    const deselectIcon = document.getElementById("deselect-All-Container");
+    const selectIcon = document.getElementById('select-All-Container');
+    const deselectIcon = document.getElementById('deselect-All-Container');

-    if (selectIcon.style.display === "none") {
-      selectIcon.style.display = "inline";
-      deselectIcon.style.display = "none";
+    if (selectIcon.style.display === 'none') {
+      selectIcon.style.display = 'inline';
+      deselectIcon.style.display = 'none';
    } else {
-      selectIcon.style.display = "none";
-      deselectIcon.style.display = "inline";
+      selectIcon.style.display = 'none';
+      deselectIcon.style.display = 'inline';
    }
    checkboxes.forEach((checkbox) => {
-
      checkbox.checked = window.selectAll;

      const pageNumber = Array.from(checkbox.parentNode.parentNode.children).indexOf(checkbox.parentNode) + 1;
@@ -386,18 +408,20 @@ class PdfContainer {
  parseCSVInput(csvInput, maxPageIndex) {
    const pages = new Set();

-    csvInput.split(",").forEach((item) => {
-      const range = item.split("-").map((p) => parseInt(p.trim()));
+    csvInput.split(',').forEach((item) => {
+      const range = item.split('-').map((p) => parseInt(p.trim()));
      if (range.length === 2) {
        const [start, end] = range;
        for (let i = start; i <= end && i <= maxPageIndex; i++) {
-          if (i > 0) { // Ensure the page number is greater than 0
+          if (i > 0) {
+            // Ensure the page number is greater than 0
            pages.add(i);
          }
        }
      } else if (range.length === 1 && Number.isInteger(range[0])) {
        const page = range[0];
-        if (page > 0 && page <= maxPageIndex) { // Ensure page is within valid range
+        if (page > 0 && page <= maxPageIndex) {
+          // Ensure page is within valid range
          pages.add(page);
        }
      }
@@ -407,24 +431,24 @@ class PdfContainer {
  }

  updatePagesFromCSV() {
-    const csvInput = document.getElementById("csv-input").value;
+    const csvInput = document.getElementById('csv-input').value;

-    const allPages = this.pagesContainer.querySelectorAll(".page-container");
+    const allPages = this.pagesContainer.querySelectorAll('.page-container');
    const maxPageIndex = allPages.length;

    window.selectedPages = this.parseCSVInput(csvInput, maxPageIndex);

    this.updateSelectedPagesDisplay();

-    const allCheckboxes = document.querySelectorAll(".pdf-actions_checkbox");
+    const allCheckboxes = document.querySelectorAll('.pdf-actions_checkbox');
    allCheckboxes.forEach((checkbox) => {
-      const page = parseInt(checkbox.getAttribute("data-page-number"));
+      const page = parseInt(checkbox.getAttribute('data-page-number'));
      checkbox.checked = window.selectedPages.includes(page);
    });
  }

  formatSelectedPages(pages) {
-    if (pages.length === 0) return "";
+    if (pages.length === 0) return '';

    pages.sort((a, b) => a - b); // Sort the page numbers in ascending order
    const ranges = [];
@@ -445,27 +469,27 @@ class PdfContainer {
    // Add the last range
    ranges.push(start === end ? `${start}` : `${start}-${end}`);

-    return ranges.join(", ");
+    return ranges.join(', ');
  }

  updateSelectedPagesDisplay() {
-    const selectedPagesList = document.getElementById("selected-pages-list");
-    const selectedPagesInput = document.getElementById("csv-input");
-    selectedPagesList.innerHTML = ""; // Clear the list
+    const selectedPagesList = document.getElementById('selected-pages-list');
+    const selectedPagesInput = document.getElementById('csv-input');
+    selectedPagesList.innerHTML = ''; // Clear the list
    window.selectedPages.sort((a, b) => a - b);
    window.selectedPages.forEach((page) => {
-      const pageItem = document.createElement("div");
-      pageItem.className = "page-item";
+      const pageItem = document.createElement('div');
+      pageItem.className = 'page-item';

-      const pageNumber = document.createElement("span");
+      const pageNumber = document.createElement('span');
      const pagelabel = /*[[#{multiTool.page}]]*/ 'Page';
-      pageNumber.className = "selected-page-number";
+      pageNumber.className = 'selected-page-number';
      pageNumber.innerText = `${pagelabel} ${page}`;
      pageItem.appendChild(pageNumber);

-      const removeBtn = document.createElement("span");
-      removeBtn.className = "remove-btn";
-      removeBtn.innerHTML = "✕";
+      const removeBtn = document.createElement('span');
+      removeBtn.className = 'remove-btn';
+      removeBtn.innerHTML = '✕';

      // Remove page from selected pages list and update display and checkbox
      removeBtn.onclick = () => {
@@ -489,7 +513,7 @@ class PdfContainer {
  parsePageRanges(ranges) {
    const pages = new Set();

-    ranges.split(',').forEach(range => {
+    ranges.split(',').forEach((range) => {
      const [start, end] = range.split('-').map(Number);
      if (end) {
        for (let i = start; i <= end; i++) {
@@ -503,23 +527,25 @@ class PdfContainer {
    return Array.from(pages).sort((a, b) => a - b);
  }

-  addFilesBlankAll() {
-    const allPages = this.pagesContainer.querySelectorAll(".page-container");
-    allPages.forEach((page, index) => {
-      if (index !== 0) {
-        this.addFiles(page, true)
-      }
-    });
-  }
+  async addFilesBlankAll() {
+    const allPages = this.pagesContainer.querySelectorAll('.page-container');

-  splitAll() {
-    const allPages = this.pagesContainer.querySelectorAll(".page-container");
-    let splitAllCommand = new SplitAllCommand(
+    let pageBreakCommand = new PageBreakCommand(
      allPages,
      window.selectPage,
      window.selectedPages,
-      "split-before"
+      this.addFilesBlank.bind(this),
+      this.pagesContainer
    );
+
+    await pageBreakCommand.execute();
+
+    this.undoManager.pushUndoClearRedo(pageBreakCommand);
+  }
+
+  splitAll() {
+    const allPages = this.pagesContainer.querySelectorAll('.page-container');
+    let splitAllCommand = new SplitAllCommand(allPages, window.selectPage, window.selectedPages, 'split-before');
    splitAllCommand.execute();

    this.undoManager.pushUndoClearRedo(splitAllCommand);
@@ -529,7 +555,7 @@ class PdfContainer {
    const baseDocument = await PDFLib.PDFDocument.load(baseDocBytes);
    const pageNum = baseDocument.getPages().length;

-    splitters.sort((a, b) => a - b);; // We'll sort the separator indexes just in case querySelectorAll does something funny.
+    splitters.sort((a, b) => a - b); // We'll sort the separator indexes just in case querySelectorAll does something funny.
    splitters.push(pageNum); // We'll also add a faux separator at the end in order to get the pages after the last separator.

    const splitDocuments = [];
@@ -540,18 +566,18 @@ class PdfContainer {

      let firstPage = splitterIndex === 0 ? 0 : splitters[splitterIndex - 1];

-      const pageIndices = Array.from({ length: splitterPosition - firstPage }, (value, key) => firstPage + key);
+      const pageIndices = Array.from({length: splitterPosition - firstPage}, (value, key) => firstPage + key);

      const copiedPages = await subDocument.copyPages(baseDocument, pageIndices);

-      copiedPages.forEach(copiedPage => {
+      copiedPages.forEach((copiedPage) => {
        subDocument.addPage(copiedPage);
      });

      const subDocumentBytes = await subDocument.save();

      splitDocuments.push(subDocumentBytes);
-    };
+    }

    return splitDocuments;
  }
@@ -560,8 +586,10 @@ class PdfContainer {
    const zip = new JSZip();

    for (let i = 0; i < pdfBytesArray.length; i++) {
-      const documentBlob = new Blob([pdfBytesArray[i]], { type: "application/pdf" });
-      zip.file(baseNameString + "-" + (i + 1) + ".pdf", documentBlob);
+      const documentBlob = new Blob([pdfBytesArray[i]], {
+        type: 'application/pdf',
+      });
+      zip.file(baseNameString + '-' + (i + 1) + '.pdf', documentBlob);
    }

    return zip;
@@ -569,10 +597,10 @@ class PdfContainer {

  async exportPdf(selected) {
    const pdfDoc = await PDFLib.PDFDocument.create();
-    const pageContainers = this.pagesContainer.querySelectorAll(".page-container"); // Select all .page-container elements
+    const pageContainers = this.pagesContainer.querySelectorAll('.page-container'); // Select all .page-container elements
    for (var i = 0; i < pageContainers.length; i++) {
      if (!selected || window.selectedPages.includes(i + 1)) {
-        const img = pageContainers[i].querySelector("img"); // Find the img element within each .page-container
+        const img = pageContainers[i].querySelector('img'); // Find the img element within each .page-container
        if (!img) continue;
        let page;
        if (img.doc) {
@@ -612,7 +640,7 @@ class PdfContainer {
        }
        const rotation = img.style.rotate;
        if (rotation) {
-          const rotationAngle = parseInt(rotation.replace(/[^\d-]/g, ""));
+          const rotationAngle = parseInt(rotation.replace(/[^\d-]/g, ''));
          page.setRotation(PDFLib.degrees(page.getRotation().angle + rotationAngle));
        }
      }
@@ -621,11 +649,11 @@ class PdfContainer {
    pdfDoc.setProducer(stirlingPDFLabel);

    const pdfBytes = await pdfDoc.save();
-    const pdfBlob = new Blob([pdfBytes], { type: "application/pdf" });
+    const pdfBlob = new Blob([pdfBytes], {type: 'application/pdf'});

-    const filenameInput = document.getElementById("filename-input");
+    const filenameInput = document.getElementById('filename-input');

-    let inputArr = filenameInput.value.split(".");
+    let inputArr = filenameInput.value.split('.');

    if (inputArr !== null && inputArr !== undefined && inputArr.length > 0) {
      inputArr = inputArr.filter((n) => n); // remove all empty strings, nulls or undefined
@@ -634,17 +662,18 @@ class PdfContainer {
        inputArr.pop(); // remove right part after last dot
      }

-      filenameInput.value = inputArr.join("");
+      filenameInput.value = inputArr.join('');
      this.fileName = filenameInput.value;
    }

-    const separators = this.pagesContainer.querySelectorAll(".split-before");
-    if (separators.length !== 0) { // Split the pdf if there are separators.
-      const baseName = this.fileName ? this.fileName : "managed";
+    const separators = this.pagesContainer.querySelectorAll('.split-before');
+    if (separators.length !== 0) {
+      // Split the pdf if there are separators.
+      const baseName = this.fileName ? this.fileName : 'managed';

      const pagesArray = Array.from(this.pagesContainer.children);
      const splitters = [];
-      separators.forEach(page => {
+      separators.forEach((page) => {
        const pageIndex = pagesArray.indexOf(page);
        if (pageIndex !== 0) {
          splitters.push(pageIndex);
@@ -655,80 +684,80 @@ class PdfContainer {
      const archivedDocuments = await this.nameAndArchiveFiles(splitDocuments, baseName);

      const self = this;
-      archivedDocuments.generateAsync({ type: "base64" }).then(function (base64) {
-        const url = "data:application/zip;base64," + base64;
-        self.downloadLink = document.createElement("a");
+      archivedDocuments.generateAsync({type: 'base64'}).then(function (base64) {
+        const url = 'data:application/zip;base64,' + base64;
+        self.downloadLink = document.createElement('a');
        self.downloadLink.href = url;
-        self.downloadLink.setAttribute("download", baseName + ".zip");
-        self.downloadLink.setAttribute("target", "_blank");
+        self.downloadLink.setAttribute('download', baseName + '.zip');
+        self.downloadLink.setAttribute('target', '_blank');
        self.downloadLink.click();
      });
-
-    } else { // Continue normally if there are no separators
+    } else {
+      // Continue normally if there are no separators

      const url = URL.createObjectURL(pdfBlob);
-      const downloadOption = localStorage.getItem("downloadOption");
+      const downloadOption = localStorage.getItem('downloadOption');

-      if (!filenameInput.value.includes(".pdf")) {
-        filenameInput.value = filenameInput.value + ".pdf";
+      if (!filenameInput.value.includes('.pdf')) {
+        filenameInput.value = filenameInput.value + '.pdf';
        this.fileName = filenameInput.value;
      }

-      if (downloadOption === "sameWindow") {
+      if (downloadOption === 'sameWindow') {
        // Open the file in the same window
        window.location.href = url;
-      } else if (downloadOption === "newWindow") {
+      } else if (downloadOption === 'newWindow') {
        // Open the file in a new window
-        window.open(url, "_blank");
+        window.open(url, '_blank');
      } else {
        // Download the file
-        this.downloadLink = document.createElement("a");
-        this.downloadLink.id = "download-link";
+        this.downloadLink = document.createElement('a');
+        this.downloadLink.id = 'download-link';
        this.downloadLink.href = url;
        // downloadLink.download = this.fileName ? this.fileName : 'managed.pdf';
        // downloadLink.download = this.fileName;
-        this.downloadLink.setAttribute("download", this.fileName ? this.fileName : "managed.pdf");
-        this.downloadLink.setAttribute("target", "_blank");
+        this.downloadLink.setAttribute('download', this.fileName ? this.fileName : 'managed.pdf');
+        this.downloadLink.setAttribute('target', '_blank');
        this.downloadLink.onclick = this.setDownloadAttribute;
        this.downloadLink.click();
      }
    }
  }

-   resetPages() {
-    const pageContainers = this.pagesContainer.querySelectorAll(".page-container");
+  resetPages() {
+    const pageContainers = this.pagesContainer.querySelectorAll('.page-container');

    pageContainers.forEach((container, index) => {
-      container.id = "page-container-" + (index + 1);
+      container.id = 'page-container-' + (index + 1);
    });

-    const checkboxes = document.querySelectorAll(".pdf-actions_checkbox");
+    const checkboxes = document.querySelectorAll('.pdf-actions_checkbox');
    window.selectAll = false;
-    const selectIcon = document.getElementById("select-All-Container");
-    const deselectIcon = document.getElementById("deselect-All-Container");
+    const selectIcon = document.getElementById('select-All-Container');
+    const deselectIcon = document.getElementById('deselect-All-Container');

-      selectIcon.style.display = "inline";
-      deselectIcon.style.display = "none";
+    selectIcon.style.display = 'inline';
+    deselectIcon.style.display = 'none';

    checkboxes.forEach((checkbox) => {
      const pageNumber = Array.from(checkbox.parentNode.parentNode.children).indexOf(checkbox.parentNode) + 1;

-        const index = window.selectedPages.indexOf(pageNumber);
-        if (index !== -1) {
-          window.selectedPages.splice(index, 1);
-        }
+      const index = window.selectedPages.indexOf(pageNumber);
+      if (index !== -1) {
+        window.selectedPages.splice(index, 1);
+      }
    });
    window.toggleSelectPageVisibility();
  }

  setDownloadAttribute() {
-    this.downloadLink.setAttribute("download", this.fileName ? this.fileName : "managed.pdf");
+    this.downloadLink.setAttribute('download', this.fileName ? this.fileName : 'managed.pdf');
  }

-  updateFilename(fileName = "") {
-    const filenameInput = document.getElementById("filename-input");
-    const pagesContainer = document.getElementById("pages-container");
-    const downloadBtn = document.getElementById("export-button");
+  updateFilename(fileName = '') {
+    const filenameInput = document.getElementById('filename-input');
+    const pagesContainer = document.getElementById('pages-container');
+    const downloadBtn = document.getElementById('export-button');

    downloadBtn.disabled = pagesContainer.childElementCount === 0;

@@ -752,38 +781,36 @@ class PdfContainer {
    // }
  }

-
  toggleSelectPageVisibility() {
    window.selectPage = !window.selectPage;
-    const checkboxes = document.querySelectorAll(".pdf-actions_checkbox");
-    checkboxes.forEach(checkbox => {
-      checkbox.classList.toggle("hidden", !window.selectPage);
+    const checkboxes = document.querySelectorAll('.pdf-actions_checkbox');
+    checkboxes.forEach((checkbox) => {
+      checkbox.classList.toggle('hidden', !window.selectPage);
    });
-    const deleteButton = document.getElementById("delete-button");
-    deleteButton.classList.toggle("hidden", !window.selectPage);
-    const selectedPages = document.getElementById("selected-pages-display");
-    selectedPages.classList.toggle("hidden", !window.selectPage);
-    const selectAll = document.getElementById("select-All-Container");
-    selectAll.classList.toggle("hidden", !window.selectPage);
-    const exportSelected = document.getElementById("export-selected-button");
-    exportSelected.classList.toggle("hidden", !window.selectPage);
-    const selectPagesButton = document.getElementById("select-pages-button");
-    selectPagesButton.style.opacity = window.selectPage ? "1" : "0.5";
+    const deleteButton = document.getElementById('delete-button');
+    deleteButton.classList.toggle('hidden', !window.selectPage);
+    const selectedPages = document.getElementById('selected-pages-display');
+    selectedPages.classList.toggle('hidden', !window.selectPage);
+    const selectAll = document.getElementById('select-All-Container');
+    selectAll.classList.toggle('hidden', !window.selectPage);
+    const exportSelected = document.getElementById('export-selected-button');
+    exportSelected.classList.toggle('hidden', !window.selectPage);
+    const selectPagesButton = document.getElementById('select-pages-button');
+    selectPagesButton.style.opacity = window.selectPage ? '1' : '0.5';

    if (window.selectPage) {
      this.updatePageNumbersAndCheckboxes();
    }
  }

-
  updatePageNumbersAndCheckboxes() {
-    const pageDivs = document.querySelectorAll(".pdf-actions_container");
+    const pageDivs = document.querySelectorAll('.pdf-actions_container');

    pageDivs.forEach((div, index) => {
      const pageNumber = index + 1;
-      const checkbox = div.querySelector(".pdf-actions_checkbox");
+      const checkbox = div.querySelector('.pdf-actions_checkbox');
      checkbox.id = `selectPageCheckbox-${pageNumber}`;
-      checkbox.setAttribute("data-page-number", pageNumber);
+      checkbox.setAttribute('data-page-number', pageNumber);
      checkbox.checked = window.selectedPages.includes(pageNumber);
    });
  }
@@ -801,8 +828,10 @@ function detectImageType(uint8Array) {
  }

  // Check for TIFF signature (little-endian and big-endian)
-  if ((uint8Array[0] === 73 && uint8Array[1] === 73 && uint8Array[2] === 42 && uint8Array[3] === 0) ||
-    (uint8Array[0] === 77 && uint8Array[1] === 77 && uint8Array[2] === 0 && uint8Array[3] === 42)) {
+  if (
+    (uint8Array[0] === 73 && uint8Array[1] === 73 && uint8Array[2] === 42 && uint8Array[3] === 0) ||
+    (uint8Array[0] === 77 && uint8Array[1] === 77 && uint8Array[2] === 0 && uint8Array[3] === 42)
+  ) {
    return 'TIFF';
  }

@@ -814,6 +843,4 @@ function detectImageType(uint8Array) {
  return 'UNKNOWN';
 }

-
-
 export default PdfContainer;
--- a/src/main/resources/static/js/multitool/commands/add-page.js
+++ b/src/main/resources/static/js/multitool/commands/add-page.js
@@ -0,0 +1,53 @@
+import {Command} from './command.js';
+
+export class AddFilesCommand extends Command {
+  constructor(element, selectedPages, addFilesAction, pagesContainer) {
+    super();
+    this.element = element;
+    this.selectedPages = selectedPages;
+    this.addFilesAction = addFilesAction;
+    this.pagesContainer = pagesContainer;
+    this.addedElements = [];
+  }
+
+  async execute() {
+    const undoBtn = document.getElementById('undo-btn');
+    undoBtn.disabled = true;
+    if (this.element) {
+      const newElement = await this.addFilesAction(this.element);
+      if (newElement) {
+        this.addedElements = newElement;
+      }
+    } else {
+      const newElement = await this.addFilesAction(false);
+      if (newElement) {
+        this.addedElements = newElement;
+      }
+    }
+    undoBtn.disabled = false;
+  }
+
+  undo() {
+    this.addedElements.forEach((element) => {
+      const nextSibling = element.nextSibling;
+      this.pagesContainer.removeChild(element);
+
+      if (this.pagesContainer.childElementCount === 0) {
+        const filenameInput = document.getElementById('filename-input');
+        const filenameParagraph = document.getElementById('filename');
+        const downloadBtn = document.getElementById('export-button');
+
+        filenameInput.disabled = true;
+        filenameInput.value = '';
+        filenameParagraph.innerText = '';
+        downloadBtn.disabled = true;
+      }
+
+      element._nextSibling = nextSibling;
+    });
+    this.addedElements = [];
+  }
+  redo() {
+    this.execute();
+  }
+}
--- a/src/main/resources/static/js/multitool/commands/delete-page.js
+++ b/src/main/resources/static/js/multitool/commands/delete-page.js
@@ -10,7 +10,9 @@ export class DeletePageCommand extends Command {
    this.filenameInputValue = document.getElementById("filename-input").value;

    const filenameParagraph = document.getElementById("filename");
-    this.filenameParagraphText = filenameParagraph ? filenameParagraph.innerText : "";
+    this.filenameParagraphText = filenameParagraph
+      ? filenameParagraph.innerText
+      : "";
  }

  execute() {
--- a/src/main/resources/static/js/multitool/commands/page-break.js
+++ b/src/main/resources/static/js/multitool/commands/page-break.js
@@ -0,0 +1,59 @@
+import {Command} from './command.js';
+
+export class PageBreakCommand extends Command {
+  constructor(elements, isSelectedInWindow, selectedPages, pageBreakCallback, pagesContainer) {
+    super();
+    this.elements = elements;
+    this.isSelectedInWindow = isSelectedInWindow;
+    this.selectedPages = selectedPages;
+    this.pageBreakCallback = pageBreakCallback;
+    this.pagesContainer = pagesContainer;
+    this.addedElements = [];
+    this.originalStates = Array.from(elements, (element) => ({
+      element,
+      hasContent: element.innerHTML.trim() !== '',
+    }));
+  }
+
+  async execute() {
+    const undoBtn = document.getElementById('undo-btn');
+    undoBtn.disabled = true;
+    for (const [index, element] of this.elements.entries()) {
+      if (!this.isSelectedInWindow || this.selectedPages.includes(index)) {
+        if (index !== 0) {
+          const newElement = await this.pageBreakCallback(element, this.addedElements);
+
+          if (newElement) {
+            this.addedElements = newElement;
+          }
+        }
+      }
+    }
+    undoBtn.disabled = false;
+  }
+
+  undo() {
+    this.addedElements.forEach((element) => {
+      const nextSibling = element.nextSibling;
+
+      this.pagesContainer.removeChild(element);
+
+      if (this.pagesContainer.childElementCount === 0) {
+        const filenameInput = document.getElementById('filename-input');
+        const filenameParagraph = document.getElementById('filename');
+        const downloadBtn = document.getElementById('export-button');
+
+        filenameInput.disabled = true;
+        filenameInput.value = '';
+        filenameParagraph.innerText = '';
+        downloadBtn.disabled = true;
+      }
+
+      element._nextSibling = nextSibling;
+    });
+  }
+
+  redo() {
+    this.execute();
+  }
+}
--- a/src/main/resources/static/js/uuid.js
+++ b/src/main/resources/static/js/uuid.js
@@ -0,0 +1,9 @@
+class UUID {
+  static uuidv4() {
+    return "10000000-1000-4000-8000-100000000000".replace(/[018]/g, c =>
+      (+c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> +c / 4).toString(16)
+    );
+  }
+}
+
+export default UUID;
--- a/src/main/resources/templates/crop.html
+++ b/src/main/resources/templates/crop.html
@@ -22,7 +22,7 @@
                <input id="y" type="hidden" name="y">
                <input id="width" type="hidden" name="width">
                <input id="height" type="hidden" name="height">
-                <button type="submit" class="btn btn-primary" th:text="#{crop.submit}"></button>
+                <button id="submitBtn" type="submit" class="btn btn-primary" th:text="#{crop.submit}"></button>
              </form>
              <div id="canvasesContainer" style="position: relative; margin: 20px 0; width: auto;">
                <canvas id="cropPdfCanvas" style="width: 100%"></canvas>
--- a/src/main/resources/templates/fragments/common.html
+++ b/src/main/resources/templates/fragments/common.html
@@ -204,11 +204,17 @@
                <script type="module" th:src="@{'/pdfjs-legacy/pdf.mjs'}"></script>
                <script th:src="@{'/js/downloader.js'}"></script>

-                <div class="custom-file-chooser" th:attr="data-bs-unique-id=${name}, data-bs-element-id=${name+'-input'}, data-bs-files-selected=#{filesSelected}, data-bs-pdf-prompt=#{pdfPrompt}">
-                  <div class="mb-3">
-                    <input type="file" class="form-control" th:name="${name}" th:id="${name}+'-input'" th:accept="${accept}" th:attr="multiple=${!disableMultipleFiles}" th:required="${notRequired} ? null : 'required'">
+                <div class="custom-file-chooser mb-3" th:attr="data-bs-unique-id=${name}, data-bs-element-id=${name+'-input'}, data-bs-element-container-id=${name+'-input-container'}, data-bs-files-selected=#{filesSelected}, data-bs-pdf-prompt=#{pdfPrompt}">
+                  <div class="mb-3 d-flex flex-row justify-content-center align-items-center flex-wrap input-container" th:name="${name}+'-input'" th:id="${name}+'-input-container'" th:data-text="#{fileChooser.hoveredDragAndDrop}">
+                      <label class="file-input-btn d-none">
+                        <input type="file" class="form-control" th:name="${name}" th:id="${name}+'-input'" th:accept="${accept}" th:attr="multiple=${!disableMultipleFiles}" th:required="${notRequired} ? null : 'required'">
+                        Browse
+                      </label>
+                      <div th:text="#{fileChooser.click}"></div>
+                      <div th:text="#{fileChooser.or}"></div>
+                      <div th:text="#{fileChooser.dragAndDrop}"></div>
                  </div>
-                  <div class="selected-files"></div>
+                    <div class="selected-files flex-wrap"></div>
                </div>

                <div class="progressBarContainer" style="display: none; position: relative;">
@@ -218,5 +224,5 @@
                    </div>
                  </div>
                </div>
-                <script th:src="@{'/js/fileInput.js'}"></script>
+                <script th:src="@{'/js/fileInput.js'}" type="module"></script>
 </th:block>
--- a/src/main/resources/templates/fragments/navbar.html
+++ b/src/main/resources/templates/fragments/navbar.html
@@ -154,6 +154,9 @@
                        <div
                          th:replace="~{fragments/navbarEntry :: navbarEntry ('cert-sign', 'workspace_premium', 'home.certSign.title', 'home.certSign.desc', 'certSign.tags', 'security')}">
                        </div>
+                        <div 
+			              th:replace="~{fragments/navbarEntry :: navbarEntry('validate-signature','verified','home.validateSignature.title','home.validateSignature.desc','validateSignature.tags','security')}">
+			            </div>
                        <div
                          th:replace="~{fragments/navbarEntry :: navbarEntry ('remove-cert-sign', 'remove_moderator', 'home.removeCertSign.title', 'home.removeCertSign.desc', 'removeCertSign.tags', 'security')}">
                        </div>
--- a/src/main/resources/templates/home.html
+++ b/src/main/resources/templates/home.html
@@ -215,6 +215,9 @@
              <div
                th:replace="~{fragments/card :: card(id='cert-sign', cardTitle=#{home.certSign.title}, cardText=#{home.certSign.desc}, cardLink='cert-sign', toolIcon='workspace_premium', tags=#{certSign.tags}, toolGroup='security')}">
              </div>
+			  <div 
+			    th:replace="~{fragments/card :: card(id='validate-signature', cardTitle=#{home.validateSignature.title}, cardText=#{home.validateSignature.desc}, cardLink='validate-signature', toolIcon='verified', tags=#{validateSignature.tags}, toolGroup='security')}">
+			  </div>
              <div
                th:replace="~{fragments/card :: card(id='remove-cert-sign', cardTitle=#{home.removeCertSign.title}, cardText=#{home.removeCertSign.desc}, cardLink='remove-cert-sign', toolIcon='remove_moderator', tags=#{removeCertSign.tags}, toolGroup='security')}">
              </div>
--- a/src/main/resources/templates/misc/change-metadata.html
+++ b/src/main/resources/templates/misc/change-metadata.html
@@ -164,13 +164,13 @@
                    keyInput.type = "text";
                    keyInput.placeholder = 'Key';
                    keyInput.className = "form-control";
-                    keyInput.name = "customKey" + count;
+                    keyInput.name = `allRequestParams[customKey${count}]`;

                    const valueInput = document.createElement("input");
                    valueInput.type = "text";
                    valueInput.placeholder = 'Value';
                    valueInput.className = "form-control";
-                    valueInput.name = "customValue" + count;
+                    valueInput.name = `allRequestParams[customValue${count}]`;
                    count = count + 1;

                    const formGroup = document.createElement("div");
--- a/src/main/resources/templates/releases.html
+++ b/src/main/resources/templates/releases.html
@@ -276,7 +276,8 @@ function formatText(text) {
    const container = document.createElement('div');
    
    // Split the text into lines
-    const lines = text.split('\n');
+    const textWithoutComments = text.replace(/<!--[\s\S]*?-->/g, '');
+    const lines = textWithoutComments.split('\n');
    let currentList = null;
    
    lines.forEach(line => {
--- a/src/main/resources/templates/security/validate-signature.html
+++ b/src/main/resources/templates/security/validate-signature.html
@@ -0,0 +1,265 @@
+<!DOCTYPE html>
+<html th:lang="${#locale.language}" th:dir="#{language.direction}" th:data-language="${#locale.toString()}" xmlns:th="https://www.thymeleaf.org">
+  <head>
+    <th:block th:insert="~{fragments/common :: head(title=#{validateSignature.title}, header=#{validateSignature.header})}"></th:block>
+  </head>
+  <body>
+    <div id="page-container">
+      <div id="content-wrap">
+        <th:block th:insert="~{fragments/navbar.html :: navbar}"></th:block>
+        <br><br>
+        <div class="container">
+          <div class="row justify-content-center">
+            <div class="col-md-6 bg-card">
+              <div class="tool-header">
+                <span class="material-symbols-rounded tool-header-icon security">verified</span>
+                <span class="tool-header-text" th:text="#{validateSignature.header}"></span>
+              </div>
+              <form id="pdfForm" th:action="@{'api/v1/security/validate-signature'}" method="post" enctype="multipart/form-data">
+                <div class="mb-3">
+                  <label th:text="#{validateSignature.selectPDF}"></label>
+                  <div th:replace="~{fragments/common :: fileSelector(name='fileInput', multipleInputsForSingleRequest=false, remoteCall='false', accept='application/pdf')}"></div>
+                </div>
+                <div class="mb-3">
+		          <label th:text="#{validateSignature.selectCustomCert}" ></label>
+		          <div th:replace="~{fragments/common :: fileSelector(name='certFile', multipleInputsForSingleRequest=false, notRequired=true, remoteCall='false', accept='.cer,.crt,.pem')}"></div>
+		        </div>
+                <div class="mb-3 text-left">
+                  <button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{validateSignature.submit}"></button>
+                </div>
+              </form>
+              
+              <!-- Results section -->
+              <div id="results" style="display: none;">
+                <h4 th:text="#{validateSignature.results}"></h4>
+                <div id="signatures-list"></div>
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+      <th:block th:insert="~{fragments/footer.html :: footer}"></th:block>
+    </div>
+
+<script th:inline="javascript">
+const translations = {
+    signature: /*[[#{validateSignature.signature}]]*/,
+    signatureInfo: /*[[#{validateSignature.signature.info}]]*/,
+    certInfo: /*[[#{validateSignature.cert.info}]]*/,
+    signer: /*[[#{validateSignature.signer}]]*/,
+    date: /*[[#{validateSignature.date}]]*/,
+    reason: /*[[#{validateSignature.reason}]]*/,
+    location: /*[[#{validateSignature.location}]]*/,
+    noSignatures: /*[[#{validateSignature.noSignatures}]]*/,
+    statusValid: /*[[#{validateSignature.status.valid}]]*/,
+    statusInvalid: /*[[#{validateSignature.status.invalid}]]*/,
+    mathValid: /*[[#{validateSignature.signature.mathValid}]]*/,
+    chainInvalid: /*[[#{validateSignature.chain.invalid}]]*/,
+    trustInvalid: /*[[#{validateSignature.trust.invalid}]]*/,
+    certExpired: /*[[#{validateSignature.cert.expired}]]*/,
+    certRevoked: /*[[#{validateSignature.cert.revoked}]]*/,
+    certIssuer: /*[[#{validateSignature.cert.issuer}]]*/,
+    certSubject: /*[[#{validateSignature.cert.subject}]]*/,
+    certSerialNumber: /*[[#{validateSignature.cert.serialNumber}]]*/,
+    certValidFrom: /*[[#{validateSignature.cert.validFrom}]]*/,
+    certValidUntil: /*[[#{validateSignature.cert.validUntil}]]*/,
+    certAlgorithm: /*[[#{validateSignature.cert.algorithm}]]*/,
+    certKeySize: /*[[#{validateSignature.cert.keySize}]]*/,
+    certBits: /*[[#{validateSignature.cert.bits}]]*/,
+    certVersion: /*[[#{validateSignature.cert.version}]]*/,
+    certKeyUsage: /*[[#{validateSignature.cert.keyUsage}]]*/,
+    certSelfSigned: /*[[#{validateSignature.cert.selfSigned}]]*/,
+    yes: /*[[#{yes}]]*/,
+    no: /*[[#{no}]]*/,
+    selectPDF: /*[[#{validateSignature.selectPDF}]]*/
+};
+
+function escapeHtml(unsafe) {
+    return unsafe
+        ?.toString()
+        .replace(/&/g, "&amp;")
+        .replace(/</g, "&lt;")
+        .replace(/>/g, "&gt;")
+        .replace(/"/g, "&quot;")
+        .replace(/'/g, "&#039;") || 'N/A';
+}
+
+document.querySelector('#pdfForm').addEventListener('submit', async (e) => {
+    e.preventDefault();
+    const fileInput = document.getElementById('fileInput-input');
+    const certInput = document.getElementById('certFile-input');
+    if (!fileInput.files.length) {
+        alert(escapeHtml(translations.selectPDF));
+        return;
+    }
+
+    const results = [];
+    for (const file of fileInput.files) {
+        const formData = new FormData();
+        formData.append('fileInput', file);
+        
+        if (certInput.files.length > 0) {
+            formData.append('certFile', certInput.files[0]);
+        }
+        try {
+            const response = await fetch(e.target.action, {
+                method: 'POST',
+                body: formData
+            });
+            
+            const fileResults = await response.json();
+            fileResults.forEach(result => {
+                result.fileName = file.name;
+            });
+            results.push(...fileResults);
+        } catch (error) {
+            results.push({
+                fileName: file.name,
+                valid: false,
+                errorMessage: `${escapeHtml(translations.statusInvalid)}: ${escapeHtml(error.message)}`
+            });
+        }
+    }
+    
+    displayResults(results);
+});
+
+function displayResults(results) {
+    const resultDiv = document.getElementById('results');
+    const listDiv = document.getElementById('signatures-list');
+    listDiv.innerHTML = '';
+    resultDiv.style.display = 'block';
+    
+    if (!results || results.length === 0) {
+        listDiv.innerHTML = `<div class="alert alert-warning">${escapeHtml(translations.noSignatures)}</div>`;
+        return;
+    }
+    
+    results.forEach((result, index) => {
+        const signatureDiv = document.createElement('div');
+        signatureDiv.className = 'card mb-3';
+        
+        let validationClass = 'alert-danger';
+        let validationIssues = [];
+        
+        if (!result.valid) {
+            validationIssues.push(`${escapeHtml(translations.statusInvalid)}: ${escapeHtml(result.errorMessage || '')}`);
+        } else {
+            const isFullyValid = result.valid && 
+                               result.chainValid && 
+                               result.trustValid && 
+                               result.notExpired && 
+                               result.notRevoked;
+
+            if (isFullyValid) {
+                validationClass = 'alert-success';
+                validationIssues.push(escapeHtml(translations.statusValid));
+            } else {
+                validationClass = 'alert-warning';
+                validationIssues.push(escapeHtml(translations.mathValid));
+                
+                if (!result.chainValid) {
+                    validationIssues.push(escapeHtml(translations.chainInvalid));
+                }
+                if (!result.trustValid) {
+                    validationIssues.push(escapeHtml(translations.trustInvalid));
+                }
+                if (!result.notExpired) {
+                    validationIssues.push(escapeHtml(translations.certExpired));
+                }
+                if (result.trustValid && result.chainValid && !result.notRevoked) {
+                    validationIssues.push(escapeHtml(translations.certRevoked));
+                }
+            }
+        }
+
+        let statusMessage = validationIssues[0];
+        if (validationIssues.length > 1) {
+            statusMessage += '<ul class="mb-0 mt-2">';
+            for (let i = 1; i < validationIssues.length; i++) {
+                statusMessage += `<li>${validationIssues[i]}</li>`;
+            }
+            statusMessage += '</ul>';
+        }
+
+        let content = `
+    <div class="card-body">
+        ${results.length > 1 ? `<h4 class="mb-3">${escapeHtml(translations.signature)} ${index + 1}</h4>` : ''}
+        <div class="alert ${validationClass}">
+            ${statusMessage}
+        </div>
+        <div class="card-text">
+            <h5>${escapeHtml(translations.signatureInfo)}</h5>
+            <table class="table table-borderless">
+                <tr>
+                    <td><strong>${escapeHtml(translations.signer)}:</strong></td>
+                    <td>${escapeHtml(result.signerName)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.date)}:</strong></td>
+                    <td>${escapeHtml(result.signatureDate)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.reason)}:</strong></td>
+                    <td>${escapeHtml(result.reason)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.location)}:</strong></td>
+                    <td>${escapeHtml(result.location)}</td>
+                </tr>
+            </table>
+            
+            <h5>${escapeHtml(translations.certInfo)}</h5>
+            <table class="table table-borderless">
+                <tr>
+                    <td><strong>${escapeHtml(translations.certIssuer)}:</strong></td>
+                    <td>${escapeHtml(result.issuerDN)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.certSubject)}:</strong></td>
+                    <td>${escapeHtml(result.subjectDN)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.certSerialNumber)}:</strong></td>
+                    <td>${escapeHtml(result.serialNumber)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.certValidFrom)}:</strong></td>
+                    <td>${escapeHtml(result.validFrom)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.certValidUntil)}:</strong></td>
+                    <td>${escapeHtml(result.validUntil)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.certAlgorithm)}:</strong></td>
+                    <td>${escapeHtml(result.signatureAlgorithm)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.certKeySize)}:</strong></td>
+                    <td>${result.keySize ? escapeHtml(result.keySize) + ' ' + escapeHtml(translations.certBits) : 'N/A'}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.certVersion)}:</strong></td>
+                    <td>${escapeHtml(result.version)}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.certKeyUsage)}:</strong></td>
+                    <td>${result.keyUsages ? result.keyUsages.map(usage => escapeHtml(usage)).join(', ') : 'N/A'}</td>
+                </tr>
+                <tr>
+                    <td><strong>${escapeHtml(translations.certSelfSigned)}:</strong></td>
+                    <td>${result.selfSigned ? escapeHtml(translations.yes) : escapeHtml(translations.no)}</td>
+                </tr>
+            </table>
+        </div>
+    </div>
+`;
+        
+        signatureDiv.innerHTML = content;
+        listDiv.appendChild(signatureDiv);
+    });
+}
+</script>
+  </body>
+</html>
Author	SHA1	Message	Date
Anthony Stirling	ea4e6fb3ef	quick fixes	2024-12-05 19:04:21 +00:00
albanobattistella	400965ffc8	Update messages_it_IT.properties (#2401 )	2024-12-05 17:39:49 +00:00
github-actions[bot]	1895a04394	📝 Update README: Translation Progress Table (#2399 ) 📝 Sync README > Made via sync_files.yml Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>	2024-12-05 17:00:41 +00:00
Omar Ahmed Hassan	f8f137a30a	Feature: Show permissions as a separate tab (#2396 ) Show permissions as a separate tab - Move permissions code into a separate for better readability and maintainability. - Separate `Permissions` node from `Encryption` so that it would be displayed in the frontend as a separate tab. - Use more user friendly permission labels such as replacing `canModify` with `Modifying` and values such as `Allowed` and `Not Allowed` instead of `true`, `false`. - Show permissions regardless of the encryption state.	2024-12-05 17:00:23 +00:00
github-actions[bot]	f6a2d4784b	Update translation files (#2398 ) Signed-off-by: GitHub Action <action@github.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>	2024-12-05 16:02:35 +00:00
reecebrowne	526dc9f911	Only download one file on sign cert (#2397 )	2024-12-05 15:58:27 +00:00
Anthony Stirling	cce9f74eb9	PDF Cert validation (#2394 ) * verifyCerts * cert info * Hardening suggestions for Stirling-PDF / certValidate (#2395) * Protect `readLine()` against DoS * Switch order of literals to prevent NullPointerException --------- Co-authored-by: pixeebot[bot] <104101892+pixeebot[bot]@users.noreply.github.com> * some basic html excaping and translation fixing --------- Co-authored-by: pixeebot[bot] <104101892+pixeebot[bot]@users.noreply.github.com> Co-authored-by: a <a>	2024-12-05 15:56:22 +00:00
Omar Ahmed Hassan	0e3865618d	Fix missing upload button (#2393 ) The code snippet `input[type=file]{ display: none;}` was unintentionally hiding the upload button, to fix this, it was changed to only target input within `.input-container`	2024-12-05 11:16:16 +00:00
reecebrowne	d888ed1ae0	Feature/undo page break (#2389 ) * Fix delete selected Fix add page break where selected Added undo logic for page breaks * Add pages undo capability * Fix page break when selected logic	2024-12-05 10:43:31 +00:00
Anthony Stirling	99d1b46d97	Update MetricsAggregatorService.java	2024-12-03 15:26:40 +00:00
Anthony Stirling	32e46eeb73	Update build.gradle	2024-12-03 10:54:07 +00:00
Omar Ahmed Hassan	b7da84d257	Fix deserialization failure in Change Metadata (#2382 ) * Fix deserialization failure from String to Map Fix deserialization failure from String to Map that caused the following exception: Resolved [org.springframework.web.bind.MethodArgumentNotValidException: Validation failed for argument [0] in public org.springframework.http.ResponseEntity<byte[]> stirling.software.SPDF.controller.api.misc.MetadataController.metadata(stirling.software.SPDF.model.api.misc.MetadataRequest) throws java.io.IOException: [Field error in object 'metadataRequest' on field 'allRequestParams': rejected value [{"customKey1" : "YourCustomKey", "customKeyValue1", "YourCustomValue"}]; codes [typeMismatch.metadataRequest.allRequestParams,typeMismatch.allRequestParams,typeMismatch.java.util.Map,typeMismatch]; * Fix form binding for dynamic Map entries in Change Metadata - Implemented support for dynamic key-value inputs in Change Metadata form using proper `name` attributes for Map (`allRequestParams`) binding. - Fix form binding for dynamic Map (`allRequestParams`) entries in Change Metadata as the `allRequestParams` (Map name) was being sent as an empty map.	2024-12-03 08:28:34 +00:00
github-actions[bot]	1c1ead5d62	📝 Update README: Translation Progress Table (#2381 ) 📝 Sync README > Made via sync_files.yml Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>	2024-12-02 19:25:16 +00:00
albanobattistella	6ff53aa5b3	Update messages_it_IT.properties (#2380 )	2024-12-02 18:59:05 +00:00
github-actions[bot]	8d60b08cd9	📝 Update README: Translation Progress Table (#2379 ) 📝 Sync README > Made via sync_files.yml Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>	2024-12-02 18:32:07 +00:00
github-actions[bot]	64cf5167c0	Update translation files (#2378 ) Signed-off-by: GitHub Action <action@github.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>	2024-12-02 18:18:16 +00:00
Omar Ahmed Hassan	de4637e8d4	Fix drag and drop area for file choosers by adding separate ones (#2368 ) * Add separate drag and drop area for file choosers - Add separate drag and drop area for file choosers ### Why? Previously, when there were multiple file choosers in the same page, if you attempted to drag and drop any files, they would be added to both file choosers as it was designed at first to handle 1 file chooser present, now that we have multiple ones, it is necessary to adapt our design to match the changing functionality. ### Can you not preserve the old overlay when there's only one file chooser present? Yes, we can, but imagine as a user, you try to drag and drop a file in one page and the fields turn into drag and drop areas then you go to another page and try to drag and drop again but you encounter the old overlay instead, as a user you might get confused and ask yourself "What changed?" or if a user is telling another user the steps to drag and drop files and he didn't know about this case, then it would still be confusing, thus consistency is preferred in this case. * Update file chooser UI * Add support for listing and removing selected files and their file icons - Selected files are listed below the file chooser in a selected files container. - Users can now remove uploaded/selected files. - Hide selected files container/box unless there are files selected/uploaded. - Add separate overlay for each drag & drop area. ## FAQ: - Why did you assign a unique id to each file? isn't the filename enough? = Because a user might upload multiple files with the same name, if the user wanted to remove one of them, how would we differentiate between them? we won't be able to unless we assign an identifier, you might argue "we remove based on the filename and size", then what if the user uploaded the same file more than once (intentionally), then we would accidentally remove all the files even though that is not what the user wanted, so going with unique ID approach would prevent this issue/problem from occurring in the first place. * Rename remove-file css class to remove-selected-file - Rename remove-file css class to remove-selected-file to avoid css conflict with remove-file in merge.css * Use input element to dispatch event on file removal Use the correct element to dispatch "file-input-change" (input element is the correct one). * Adapt file chooser UI to themes - Adapt file chooser UI to themes by adjusting their font colors and background colors. - Make text more visible in overlay by increasing the font size by 0.1rem and setting font weight to 550. * Remove extra overlay border - Removing overlay's border as it is unnecessary and only causing a double border issue on the file input container. * Remove Browse button, highlight file chooser and make it clickable - Remove browse button. - Make the entire file chooser container clickable. - Add glowing effect on hover for file chooser. - Change color of file chooser on hover. * Replace crypto.randomUUID() with UUID.uuidv4() - Replace crypto.randomUUID() with UUID.uuidv4() as crypto.randomUUID() is only supported in secured contexts such as localhost 127.0.0.1 and over HTTPS * Fix merge file removal not being reflected in file chooser - Files removed from the list in merge page would now be reflected in the file chooser's container. * Make inputElement optional in removeFileById - Make inputElement optional in removeFileById, this way we could control changing inputElements files. * Add translation support to file chooser --------- Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>	2024-12-02 18:10:12 +00:00
Sai Kumar	3c0a8071dc	added support for new line break in stampController (#2370 ) added support for new line in stampController Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>	2024-12-02 17:48:19 +00:00
Omar Ahmed Hassan	04ccdf6f76	Fix: prevent fileInput.js from adding event listeners more than once (#2365 ) Fix fileInput.js adding event listeners more than once - Fix a bug that caused fileInput.js to add event listeners more than once per HTML file as it's included in fileSelector fragment in fragments/common.html thus it's being loaded N times where N is the number of file selectors / custom file chooser / file input elements per HTML file, which resulted in each event actions being executed N times as well, which was prevalent in drag and drop operations such as dragging and dropping a file called y.png, it would be duplicated N times (as in /sign path).	2024-12-02 17:41:11 +00:00
Omar Ahmed Hassan	db02fba31f	Fix translations for watermark spacers (#2369 ) Fix translations by adding a space between width/height and spacer and capitalize the first letter	2024-12-02 17:01:19 +00:00
Omar Ahmed Hassan	5b6f649e4e	Fix submit button in crop by adding id (#2374 ) - Add missing ID to submit button in crop page.	2024-12-02 10:40:46 +00:00
Omar Ahmed Hassan	de23bb702c	Fix allowing multiple files to be dropped onto a single file input (#2359 ) Fix a bug that allowed multiple files to be dropped onto a single-file input element - Fix a bug that allowed multiple files to be dropped onto a single-file input element by accepting only the first file.	2024-11-29 17:31:14 +00:00
github-actions[bot]	25e564154e	Update 3rd Party Licenses (#2362 ) Signed-off-by: GitHub Action <action@github.com> Co-authored-by: GitHub Action <action@github.com>	2024-11-29 15:41:29 +00:00
Anthony Stirling	3633a979d3	fixes and other changes and debug of WIP SAML (#2360 ) * backup * remove debugs * oauth to saml and compare fixes etc * ee flag for saml * more fixes * info to debug * remove unused repo * spring dev fix for saml * debugs * saml stuff * debugs * fix	2024-11-29 15:11:59 +00:00