Removal of Ghostscript to use qpdf and tesseract directly (#2338)

* navbar fix multi tool and compress location

* release notes and ghostscript removal

* cleanups

* formatting

* update docs

* more

* more

* docs

* release bump

* Hardening suggestions for Stirling-PDF / ghostscript (#2339)

* Protect `readLine()` against DoS

* Sanitized user-provided file names in HTTP multipart uploads

---------

Co-authored-by: pixeebot[bot] <104101892+pixeebot[bot]@users.noreply.github.com>

---------

Co-authored-by: pixeebot[bot] <104101892+pixeebot[bot]@users.noreply.github.com>

src/main/java/stirling/software/SPDF/config/EndpointConfiguration.java

@@ -188,7 +188,7 @@ public class EndpointConfiguration {
         addEndpointToGroup("OpenCV", "extract-image-scans");
 
         // LibreOffice
-        addEndpointToGroup("LibreOffice", "repair");
+        addEndpointToGroup("qpdf", "repair");
         addEndpointToGroup("LibreOffice", "file-to-pdf");
         addEndpointToGroup("LibreOffice", "pdf-to-word");
         addEndpointToGroup("LibreOffice", "pdf-to-presentation");
@@ -199,10 +199,11 @@ public class EndpointConfiguration {
         // Unoconv
         addEndpointToGroup("Unoconv", "file-to-pdf");
 
-        // OCRmyPDF
-        addEndpointToGroup("OCRmyPDF", "compress-pdf");
-        addEndpointToGroup("OCRmyPDF", "pdf-to-pdfa");
-        addEndpointToGroup("OCRmyPDF", "ocr-pdf");
+        // qpdf
+        addEndpointToGroup("qpdf", "compress-pdf");
+        addEndpointToGroup("qpdf", "pdf-to-pdfa");
+
+        addEndpointToGroup("tesseract", "ocr-pdf");
 
         // Java
         addEndpointToGroup("Java", "merge-pdfs");
@@ -248,10 +249,10 @@ public class EndpointConfiguration {
         addEndpointToGroup("Javascript", "compare");
         addEndpointToGroup("Javascript", "adjust-contrast");
 
-        // Ghostscript dependent endpoints
-        addEndpointToGroup("Ghostscript", "compress-pdf");
-        addEndpointToGroup("Ghostscript", "pdf-to-pdfa");
-        addEndpointToGroup("Ghostscript", "repair");
+        // qpdf dependent endpoints
+        addEndpointToGroup("qpdf", "compress-pdf");
+        addEndpointToGroup("qpdf", "pdf-to-pdfa");
+        addEndpointToGroup("qpdf", "repair");
 
         // Weasyprint dependent endpoints
         addEndpointToGroup("Weasyprint", "html-to-pdf");

src/main/java/stirling/software/SPDF/config/ExternalAppDepConfig.java

@@ -37,12 +37,13 @@ public class ExternalAppDepConfig {
     private final Map<String, List<String>> commandToGroupMapping =
             new HashMap<>() {
                 {
-                    put("gs", List.of("Ghostscript"));
                     put("soffice", List.of("LibreOffice"));
-                    put("ocrmypdf", List.of("OCRmyPDF"));
                     put("weasyprint", List.of("Weasyprint"));
                     put("pdftohtml", List.of("Pdftohtml"));
                     put("unoconv", List.of("Unoconv"));
+                    put("qpdf", List.of("qpdf"));
+                    put("tesseract", List.of("tesseract"));
+                    
                 }
             };
 
@@ -97,9 +98,9 @@ public class ExternalAppDepConfig {
     public void checkDependencies() {
 
         // Check core dependencies
-        checkDependencyAndDisableGroup("gs");
+    	checkDependencyAndDisableGroup("tesseract");
         checkDependencyAndDisableGroup("soffice");
-        checkDependencyAndDisableGroup("ocrmypdf");
+        checkDependencyAndDisableGroup("qpdf");
         checkDependencyAndDisableGroup("weasyprint");
         checkDependencyAndDisableGroup("pdftohtml");
         checkDependencyAndDisableGroup("unoconv");

src/main/java/stirling/software/SPDF/controller/api/converters/ConvertPDFToPDFA.java

@@ -1,12 +1,13 @@
 package stirling.software.SPDF.controller.api.converters;
 
-import java.io.FileOutputStream;
-import java.io.OutputStream;
+import java.io.File;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
+import org.apache.commons.io.FileUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.http.MediaType;
@@ -37,59 +38,90 @@ public class ConvertPDFToPDFA {
     @Operation(
             summary = "Convert a PDF to a PDF/A",
             description =
-                    "This endpoint converts a PDF file to a PDF/A file. PDF/A is a format designed for long-term archiving of digital documents. Input:PDF Output:PDF Type:SISO")
+                    "This endpoint converts a PDF file to a PDF/A file using LibreOffice. PDF/A is a format designed for long-term archiving of digital documents. Input:PDF Output:PDF Type:SISO")
     public ResponseEntity<byte[]> pdfToPdfA(@ModelAttribute PdfToPdfARequest request)
             throws Exception {
         MultipartFile inputFile = request.getFileInput();
         String outputFormat = request.getOutputFormat();
 
-        // Convert MultipartFile to byte[]
-        byte[] pdfBytes = inputFile.getBytes();
-
-        // Save the uploaded file to a temporary location
-        Path tempInputFile = Files.createTempFile("input_", ".pdf");
-        try (OutputStream outputStream = new FileOutputStream(tempInputFile.toFile())) {
-            outputStream.write(pdfBytes);
+        // Validate input file type
+        if (!"application/pdf".equals(inputFile.getContentType())) {
+            logger.error("Invalid input file type: {}", inputFile.getContentType());
+            throw new IllegalArgumentException("Input file must be a PDF");
         }
 
-        // Prepare the output file path
-        Path tempOutputFile = Files.createTempFile("output_", ".pdf");
-
-        // Prepare the ghostscript command
-        List<String> command = new ArrayList<>();
-        command.add("gs");
-        command.add("-dPDFA=" + ("pdfa".equals(outputFormat) ? "2" : "1"));
-        command.add("-dNOPAUSE");
-        command.add("-dBATCH");
-        command.add("-sColorConversionStrategy=sRGB");
-        command.add("-sDEVICE=pdfwrite");
-        command.add("-dPDFACompatibilityPolicy=2");
-        command.add("-o");
-        command.add(tempOutputFile.toString());
-        command.add(tempInputFile.toString());
-
-        ProcessExecutorResult returnCode =
-                ProcessExecutor.getInstance(ProcessExecutor.Processes.GHOSTSCRIPT)
-                        .runCommandWithOutputHandling(command);
-
-        if (returnCode.getRc() != 0) {
-            logger.info(
-                    outputFormat + " conversion failed with return code: " + returnCode.getRc());
+        // Get the original filename without extension
+        String originalFileName = Filenames.toSimpleFileName(inputFile.getOriginalFilename());
+        if (originalFileName == null || originalFileName.trim().isEmpty()) {
+            originalFileName = "output.pdf";
         }
+        String baseFileName =
+                originalFileName.contains(".")
+                        ? originalFileName.substring(0, originalFileName.lastIndexOf('.'))
+                        : originalFileName;
+
+        Path tempInputFile = null;
+        Path tempOutputDir = null;
+        byte[] fileBytes;
 
         try {
-            byte[] pdfBytesOutput = Files.readAllBytes(tempOutputFile);
-            // Return the optimized PDF as a response
-            String outputFilename =
-                    Filenames.toSimpleFileName(inputFile.getOriginalFilename())
-                                    .replaceFirst("[.][^.]+$", "")
-                            + "_PDFA.pdf";
+            // Save uploaded file to temp location
+            tempInputFile = Files.createTempFile("input_", ".pdf");
+            inputFile.transferTo(tempInputFile);
+
+            // Create temp output directory
+            tempOutputDir = Files.createTempDirectory("output_");
+
+            // Determine PDF/A filter based on requested format
+            String pdfFilter =
+                    "pdfa".equals(outputFormat)
+                            ? "writer_pdf_Export:{'SelectPdfVersion':{'Value':'2'}}:writer_pdf_Export"
+                            : "writer_pdf_Export:{'SelectPdfVersion':{'Value':'1'}}:writer_pdf_Export";
+
+            // Prepare LibreOffice command
+            List<String> command =
+                    new ArrayList<>(
+                            Arrays.asList(
+                                    "soffice",
+                                    "--headless",
+                                    "--nologo",
+                                    "--convert-to",
+                                    "pdf:" + pdfFilter,
+                                    "--outdir",
+                                    tempOutputDir.toString(),
+                                    tempInputFile.toString()));
+
+            ProcessExecutorResult returnCode =
+                    ProcessExecutor.getInstance(ProcessExecutor.Processes.LIBRE_OFFICE)
+                            .runCommandWithOutputHandling(command);
+
+            if (returnCode.getRc() != 0) {
+                logger.error("PDF/A conversion failed with return code: {}", returnCode.getRc());
+                throw new RuntimeException("PDF/A conversion failed");
+            }
+
+            // Get the output file
+            File[] outputFiles = tempOutputDir.toFile().listFiles();
+            if (outputFiles == null || outputFiles.length != 1) {
+                throw new RuntimeException(
+                        "Expected exactly one output file but found "
+                                + (outputFiles == null ? "none" : outputFiles.length));
+            }
+
+            fileBytes = FileUtils.readFileToByteArray(outputFiles[0]);
+            String outputFilename = baseFileName + "_PDFA.pdf";
+
             return WebResponseUtils.bytesToWebResponse(
-                    pdfBytesOutput, outputFilename, MediaType.APPLICATION_PDF);
+                    fileBytes, outputFilename, MediaType.APPLICATION_PDF);
+
         } finally {
-            // Clean up the temporary files
-            Files.deleteIfExists(tempInputFile);
-            Files.deleteIfExists(tempOutputFile);
+            // Clean up temporary files
+            if (tempInputFile != null) {
+                Files.deleteIfExists(tempInputFile);
+            }
+            if (tempOutputDir != null) {
+                FileUtils.deleteDirectory(tempOutputDir.toFile());
+            }
         }
     }
 }

src/main/java/stirling/software/SPDF/controller/api/converters/ExtractCSVController.java

@@ -20,7 +20,7 @@ import org.springframework.web.bind.annotation.RestController;
 
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
-import stirling.software.SPDF.controller.api.CropController;
+
 import stirling.software.SPDF.model.api.extract.PDFFilePage;
 import stirling.software.SPDF.pdf.FlexibleCSVWriter;
 import technology.tabula.ObjectExtractor;
@@ -37,11 +37,15 @@ public class ExtractCSVController {
     private static final Logger logger = LoggerFactory.getLogger(ExtractCSVController.class);
 
     @PostMapping(value = "/pdf/csv", consumes = "multipart/form-data")
-    @Operation(summary = "Extracts a CSV document from a PDF", description = "This operation takes an input PDF file and returns CSV file of whole page. Input:PDF Output:CSV Type:SISO")
+    @Operation(
+            summary = "Extracts a CSV document from a PDF",
+            description =
+                    "This operation takes an input PDF file and returns CSV file of whole page. Input:PDF Output:CSV Type:SISO")
     public ResponseEntity<String> PdfToCsv(@ModelAttribute PDFFilePage form) throws Exception {
         StringWriter writer = new StringWriter();
         try (PDDocument document = Loader.loadPDF(form.getFileInput().getBytes())) {
-            CSVFormat format = CSVFormat.EXCEL.builder().setEscape('"').setQuoteMode(QuoteMode.ALL).build();
+            CSVFormat format =
+                    CSVFormat.EXCEL.builder().setEscape('"').setQuoteMode(QuoteMode.ALL).build();
             Writer csvWriter = new FlexibleCSVWriter(format);
             SpreadsheetExtractionAlgorithm sea = new SpreadsheetExtractionAlgorithm();
             try (ObjectExtractor extractor = new ObjectExtractor(document)) {
@@ -56,8 +60,8 @@ public class ExtractCSVController {
                 ContentDisposition.builder("attachment")
                         .filename(
                                 form.getFileInput()
-                                        .getOriginalFilename()
-                                        .replaceFirst("[.][^.]+$", "")
+                                                .getOriginalFilename()
+                                                .replaceFirst("[.][^.]+$", "")
                                         + "_extracted.csv")
                         .build());
         headers.setContentType(MediaType.parseMediaType("text/csv"));

src/main/java/stirling/software/SPDF/controller/api/misc/CompressController.java

@@ -10,7 +10,6 @@ import java.util.List;
 
 import javax.imageio.ImageIO;
 
-import org.apache.commons.io.FileUtils;
 import org.apache.pdfbox.Loader;
 import org.apache.pdfbox.cos.COSName;
 import org.apache.pdfbox.pdmodel.PDDocument;
@@ -53,6 +52,54 @@ public class CompressController {
         this.pdfDocumentFactory = pdfDocumentFactory;
     }
 
+    private void compressImagesInPDF(Path pdfFile, double initialScaleFactor) throws Exception {
+        byte[] fileBytes = Files.readAllBytes(pdfFile);
+        try (PDDocument doc = Loader.loadPDF(fileBytes)) {
+            double scaleFactor = initialScaleFactor;
+
+            for (PDPage page : doc.getPages()) {
+                PDResources res = page.getResources();
+                if (res != null && res.getXObjectNames() != null) {
+                    for (COSName name : res.getXObjectNames()) {
+                        PDXObject xobj = res.getXObject(name);
+                        if (xobj instanceof PDImageXObject) {
+                            PDImageXObject image = (PDImageXObject) xobj;
+                            BufferedImage bufferedImage = image.getImage();
+
+                            int newWidth = (int) (bufferedImage.getWidth() * scaleFactor);
+                            int newHeight = (int) (bufferedImage.getHeight() * scaleFactor);
+
+                            if (newWidth == 0 || newHeight == 0) {
+                                continue;
+                            }
+
+                            Image scaledImage =
+                                    bufferedImage.getScaledInstance(
+                                            newWidth, newHeight, Image.SCALE_SMOOTH);
+
+                            BufferedImage scaledBufferedImage =
+                                    new BufferedImage(
+                                            newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
+                            scaledBufferedImage.getGraphics().drawImage(scaledImage, 0, 0, null);
+
+                            ByteArrayOutputStream compressedImageStream =
+                                    new ByteArrayOutputStream();
+                            ImageIO.write(scaledBufferedImage, "jpeg", compressedImageStream);
+                            byte[] imageBytes = compressedImageStream.toByteArray();
+                            compressedImageStream.close();
+
+                            PDImageXObject compressedImage =
+                                    PDImageXObject.createFromByteArray(
+                                            doc, imageBytes, image.getCOSObject().toString());
+                            res.put(name, compressedImage);
+                        }
+                    }
+                }
+            }
+            doc.save(pdfFile.toString());
+        }
+    }
+
     @PostMapping(consumes = "multipart/form-data", value = "/compress-pdf")
     @Operation(
             summary = "Optimize PDF file",
@@ -75,209 +122,92 @@ public class CompressController {
             autoMode = true;
         }
 
-        // Save the uploaded file to a temporary location
         Path tempInputFile = Files.createTempFile("input_", ".pdf");
         inputFile.transferTo(tempInputFile.toFile());
 
         long inputFileSize = Files.size(tempInputFile);
 
-        // Prepare the output file path
-
         Path tempOutputFile = null;
         byte[] pdfBytes;
         try {
             tempOutputFile = Files.createTempFile("output_", ".pdf");
-            // Determine initial optimization level based on expected size reduction, only if in
-            // autoMode
+
             if (autoMode) {
                 double sizeReductionRatio = expectedOutputSize / (double) inputFileSize;
-                if (sizeReductionRatio > 0.7) {
-                    optimizeLevel = 1;
-                } else if (sizeReductionRatio > 0.5) {
-                    optimizeLevel = 2;
-                } else if (sizeReductionRatio > 0.35) {
-                    optimizeLevel = 3;
-                } else {
-                    optimizeLevel = 3;
-                }
+                optimizeLevel = determineOptimizeLevel(sizeReductionRatio);
             }
 
             boolean sizeMet = false;
-            while (!sizeMet && optimizeLevel <= 4) {
-                // Prepare the Ghostscript command
-                List<String> command = new ArrayList<>();
-                command.add("gs");
-                command.add("-sDEVICE=pdfwrite");
-                command.add("-dCompatibilityLevel=1.5");
+            while (!sizeMet && optimizeLevel <= 9) {
 
-                switch (optimizeLevel) {
-                    case 1:
-                        command.add("-dPDFSETTINGS=/prepress");
-                        break;
-                    case 2:
-                        command.add("-dPDFSETTINGS=/printer");
-                        break;
-                    case 3:
-                        command.add("-dPDFSETTINGS=/ebook");
-                        break;
-                    case 4:
-                        command.add("-dPDFSETTINGS=/screen");
-                        break;
-                    default:
-                        command.add("-dPDFSETTINGS=/default");
+                // Apply additional image compression for levels 6-9
+                if (optimizeLevel >= 6) {
+                    // Calculate scale factor based on optimization level
+                    double scaleFactor =
+                            switch (optimizeLevel) {
+                                case 6 -> 0.9; // 90% of original size
+                                case 7 -> 0.8; // 80% of original size
+                                case 8 -> 0.65; // 70% of original size
+                                case 9 -> 0.5; // 60% of original size
+                                default -> 1.0;
+                            };
+                    compressImagesInPDF(tempInputFile, scaleFactor);
                 }
 
-                command.add("-dNOPAUSE");
-                command.add("-dQUIET");
-                command.add("-dBATCH");
-                command.add("-sOutputFile=" + tempOutputFile.toString());
+                // Run QPDF optimization
+                List<String> command = new ArrayList<>();
+                command.add("qpdf");
+                if (request.getNormalize()) {
+                    command.add("--normalize-content=y");
+                }
+                if (request.getLinearize()) {
+                    command.add("--linearize");
+                }
+                command.add("--optimize-images");
+                command.add("--recompress-flate");
+                command.add("--compression-level=" + optimizeLevel);
+                command.add("--compress-streams=y");
+                command.add("--object-streams=generate");
                 command.add(tempInputFile.toString());
+                command.add(tempOutputFile.toString());
 
-                ProcessExecutorResult returnCode =
-                        ProcessExecutor.getInstance(ProcessExecutor.Processes.GHOSTSCRIPT)
-                                .runCommandWithOutputHandling(command);
+                ProcessExecutorResult returnCode = null;
+                try {
+                    returnCode =
+                            ProcessExecutor.getInstance(ProcessExecutor.Processes.QPDF)
+                                    .runCommandWithOutputHandling(command);
+                } catch (Exception e) {
+                    if (returnCode != null && returnCode.getRc() != 3) {
+                        throw e;
+                    }
+                }
 
-                // Check if file size is within expected size or not auto mode so instantly finish
+                // Check if file size is within expected size or not auto mode
                 long outputFileSize = Files.size(tempOutputFile);
                 if (outputFileSize <= expectedOutputSize || !autoMode) {
                     sizeMet = true;
                 } else {
-                    // Increase optimization level for next iteration
-                    optimizeLevel++;
-                    if (autoMode && optimizeLevel > 4) {
-                        logger.info("Skipping level 5 due to bad results in auto mode");
+                    optimizeLevel =
+                            incrementOptimizeLevel(
+                                    optimizeLevel, outputFileSize, expectedOutputSize);
+                    if (autoMode && optimizeLevel > 9) {
+                        logger.info("Maximum compression level reached in auto mode");
                         sizeMet = true;
-                    } else {
-                        logger.info(
-                                "Increasing ghostscript optimisation level to " + optimizeLevel);
                     }
                 }
             }
 
-            if (expectedOutputSize != null && autoMode) {
-                long outputFileSize = Files.size(tempOutputFile);
-                byte[] fileBytes = Files.readAllBytes(tempOutputFile);
-                if (outputFileSize > expectedOutputSize) {
-                    try (PDDocument doc = Loader.loadPDF(fileBytes)) {
-                        long previousFileSize = 0;
-                        double scaleFactorConst = 0.9f;
-                        double scaleFactor = 0.9f;
-                        while (true) {
-                            for (PDPage page : doc.getPages()) {
-                                PDResources res = page.getResources();
-                                if (res != null && res.getXObjectNames() != null) {
-                                    for (COSName name : res.getXObjectNames()) {
-                                        PDXObject xobj = res.getXObject(name);
-                                        if (xobj != null && xobj instanceof PDImageXObject) {
-                                            PDImageXObject image = (PDImageXObject) xobj;
-
-                                            // Get the image in BufferedImage format
-                                            BufferedImage bufferedImage = image.getImage();
-
-                                            // Calculate the new dimensions
-                                            int newWidth =
-                                                    (int)
-                                                            (bufferedImage.getWidth()
-                                                                    * scaleFactorConst);
-                                            int newHeight =
-                                                    (int)
-                                                            (bufferedImage.getHeight()
-                                                                    * scaleFactorConst);
-
-                                            // If the new dimensions are zero, skip this iteration
-                                            if (newWidth == 0 || newHeight == 0) {
-                                                continue;
-                                            }
-
-                                            // Otherwise, proceed with the scaling
-                                            Image scaledImage =
-                                                    bufferedImage.getScaledInstance(
-                                                            newWidth,
-                                                            newHeight,
-                                                            Image.SCALE_SMOOTH);
-
-                                            // Convert the scaled image back to a BufferedImage
-                                            BufferedImage scaledBufferedImage =
-                                                    new BufferedImage(
-                                                            newWidth,
-                                                            newHeight,
-                                                            BufferedImage.TYPE_INT_RGB);
-                                            scaledBufferedImage
-                                                    .getGraphics()
-                                                    .drawImage(scaledImage, 0, 0, null);
-
-                                            // Compress the scaled image
-                                            ByteArrayOutputStream compressedImageStream =
-                                                    new ByteArrayOutputStream();
-                                            ImageIO.write(
-                                                    scaledBufferedImage,
-                                                    "jpeg",
-                                                    compressedImageStream);
-                                            byte[] imageBytes = compressedImageStream.toByteArray();
-                                            compressedImageStream.close();
-
-                                            PDImageXObject compressedImage =
-                                                    PDImageXObject.createFromByteArray(
-                                                            doc,
-                                                            imageBytes,
-                                                            image.getCOSObject().toString());
-
-                                            // Replace the image in the resources with the
-                                            // compressed
-                                            // version
-                                            res.put(name, compressedImage);
-                                        }
-                                    }
-                                }
-                            }
-
-                            // save the document to tempOutputFile again
-                            doc.save(tempOutputFile.toString());
-
-                            long currentSize = Files.size(tempOutputFile);
-                            // Check if the overall PDF size is still larger than expectedOutputSize
-                            if (currentSize > expectedOutputSize) {
-                                // Log the current file size and scaleFactor
-
-                                logger.info(
-                                        "Current file size: "
-                                                + FileUtils.byteCountToDisplaySize(currentSize));
-                                logger.info("Current scale factor: " + scaleFactor);
-
-                                // The file is still too large, reduce scaleFactor and try again
-                                scaleFactor *= 0.9f; // reduce scaleFactor by 10%
-                                // Avoid scaleFactor being too small, causing the image to shrink to
-                                // 0
-                                if (scaleFactor < 0.2f || previousFileSize == currentSize) {
-                                    throw new RuntimeException(
-                                            "Could not reach the desired size without excessively degrading image quality, lowest size recommended is "
-                                                    + FileUtils.byteCountToDisplaySize(currentSize)
-                                                    + ", "
-                                                    + currentSize
-                                                    + " bytes");
-                                }
-                                previousFileSize = currentSize;
-                            } else {
-                                // The file is small enough, break the loop
-                                break;
-                            }
-                        }
-                    }
-                }
-            }
             // Read the optimized PDF file
             pdfBytes = Files.readAllBytes(tempOutputFile);
             Path finalFile = tempOutputFile;
+
             // Check if optimized file is larger than the original
             if (pdfBytes.length > inputFileSize) {
-                // Log the occurrence
                 logger.warn(
                         "Optimized file is larger than the original. Returning the original file instead.");
-
-                // Read the original file again
                 finalFile = tempInputFile;
             }
-            // Return the optimized PDF as a response
+
             String outputFilename =
                     Filenames.toSimpleFileName(inputFile.getOriginalFilename())
                                     .replaceFirst("[.][^.]+$", "")
@@ -286,10 +216,31 @@ public class CompressController {
                     pdfDocumentFactory.load(finalFile.toFile()), outputFilename);
 
         } finally {
-            // Clean up the temporary files
-            // deleted by multipart file handler deu to transferTo?
-            // Files.deleteIfExists(tempInputFile);
             Files.deleteIfExists(tempOutputFile);
         }
     }
+
+    private int determineOptimizeLevel(double sizeReductionRatio) {
+        if (sizeReductionRatio > 0.9) return 1;
+        if (sizeReductionRatio > 0.8) return 2;
+        if (sizeReductionRatio > 0.7) return 3;
+        if (sizeReductionRatio > 0.6) return 4;
+        if (sizeReductionRatio > 0.5) return 5;
+        if (sizeReductionRatio > 0.4) return 6;
+        if (sizeReductionRatio > 0.3) return 7;
+        if (sizeReductionRatio > 0.2) return 8;
+        return 9;
+    }
+
+    private int incrementOptimizeLevel(int currentLevel, long currentSize, long targetSize) {
+        double currentRatio = currentSize / (double) targetSize;
+        logger.info("Current compression ratio: {}", String.format("%.2f", currentRatio));
+
+        if (currentRatio > 2.0) {
+            return Math.min(9, currentLevel + 3);
+        } else if (currentRatio > 1.5) {
+            return Math.min(9, currentLevel + 2);
+        }
+        return Math.min(9, currentLevel + 1);
+    }
 }

src/main/java/stirling/software/SPDF/controller/api/misc/FakeScanControllerWIP.java

@@ -58,7 +58,7 @@ public class FakeScanControllerWIP {
     @Operation(
             summary = "Repair a PDF file",
             description =
-                    "This endpoint repairs a given PDF file by running Ghostscript command. The PDF is first saved to a temporary location, repaired, read back, and then returned as a response.")
+                    "This endpoint repairs a given PDF file by running qpdf command. The PDF is first saved to a temporary location, repaired, read back, and then returned as a response.")
     public ResponseEntity<byte[]> fakeScan(@ModelAttribute PDFFile request) throws IOException {
         MultipartFile inputFile = request.getFileInput();
 

src/main/java/stirling/software/SPDF/controller/api/misc/OCRController.java

@@ -1,19 +1,31 @@
 package stirling.software.SPDF.controller.api.misc;
 
-import java.io.ByteArrayInputStream;
+import io.github.pixee.security.BoundedLineReader;
+import io.github.pixee.security.Filenames;
+import java.awt.image.BufferedImage;
+import java.io.BufferedReader;
 import java.io.File;
-import java.io.FileOutputStream;
+import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.InputStreamReader;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 
+import javax.imageio.ImageIO;
+
+import org.apache.pdfbox.multipdf.PDFMergerUtility;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.rendering.PDFRenderer;
+import org.apache.pdfbox.text.PDFTextStripper;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
@@ -23,24 +35,29 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.multipart.MultipartFile;
 
-import io.github.pixee.security.Filenames;
-import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 
+import lombok.extern.slf4j.Slf4j;
 import stirling.software.SPDF.model.ApplicationProperties;
 import stirling.software.SPDF.model.api.misc.ProcessPdfWithOcrRequest;
 import stirling.software.SPDF.service.CustomPDDocumentFactory;
-import stirling.software.SPDF.utils.ProcessExecutor;
-import stirling.software.SPDF.utils.ProcessExecutor.ProcessExecutorResult;
-import stirling.software.SPDF.utils.WebResponseUtils;
 
 @RestController
 @RequestMapping("/api/v1/misc")
 @Tag(name = "Misc", description = "Miscellaneous APIs")
+@Slf4j
 public class OCRController {
 
-    @Autowired ApplicationProperties applicationProperties;
+    @Autowired private ApplicationProperties applicationProperties;
 
+    private final CustomPDDocumentFactory pdfDocumentFactory;
+
+    @Autowired
+    public OCRController(CustomPDDocumentFactory pdfDocumentFactory) {
+        this.pdfDocumentFactory = pdfDocumentFactory;
+    }
+
+    /** Gets the list of available Tesseract languages from the tessdata directory */
     public List<String> getAvailableTesseractLanguages() {
         String tessdataDir = applicationProperties.getSystem().getTessdataDir();
         File[] files = new File(tessdataDir).listFiles();
@@ -54,196 +71,161 @@ public class OCRController {
                 .collect(Collectors.toList());
     }
 
-    private final CustomPDDocumentFactory pdfDocumentFactory;
-
-    @Autowired
-    public OCRController(CustomPDDocumentFactory pdfDocumentFactory) {
-        this.pdfDocumentFactory = pdfDocumentFactory;
-    }
-
     @PostMapping(consumes = "multipart/form-data", value = "/ocr-pdf")
-    @Operation(
-            summary = "Process a PDF file with OCR",
-            description =
-                    "This endpoint processes a PDF file using OCR (Optical Character Recognition). Users can specify languages, sidecar, deskew, clean, cleanFinal, ocrType, ocrRenderType, and removeImagesAfter options. Input:PDF Output:PDF Type:SI-Conditional")
     public ResponseEntity<byte[]> processPdfWithOCR(
             @ModelAttribute ProcessPdfWithOcrRequest request)
             throws IOException, InterruptedException {
         MultipartFile inputFile = request.getFileInput();
-        List<String> selectedLanguages = request.getLanguages();
-        Boolean sidecar = request.isSidecar();
-        Boolean deskew = request.isDeskew();
-        Boolean clean = request.isClean();
-        Boolean cleanFinal = request.isCleanFinal();
+        List<String> languages = request.getLanguages();
         String ocrType = request.getOcrType();
-        String ocrRenderType = request.getOcrRenderType();
-        Boolean removeImagesAfter = request.isRemoveImagesAfter();
-        // --output-type pdfa
-        if (selectedLanguages == null || selectedLanguages.isEmpty()) {
-            throw new IOException("Please select at least one language.");
-        }
 
-        if (!"hocr".equals(ocrRenderType) && !"sandwich".equals(ocrRenderType)) {
-            throw new IOException("ocrRenderType wrong");
-        }
+        Path tempDir = Files.createTempDirectory("ocr_process");
+        Path tempInputFile = tempDir.resolve("input.pdf");
+        Path tempOutputDir = tempDir.resolve("output");
+        Path tempImagesDir = tempDir.resolve("images");
+        Path finalOutputFile = tempDir.resolve("final_output.pdf");
 
-        // Get available Tesseract languages
-        List<String> availableLanguages = getAvailableTesseractLanguages();
-
-        // Validate selected languages
-        selectedLanguages =
-                selectedLanguages.stream().filter(availableLanguages::contains).toList();
-
-        if (selectedLanguages.isEmpty()) {
-            throw new IOException("None of the selected languages are valid.");
-        }
-        // Save the uploaded file to a temporary location
-        Path tempInputFile = Files.createTempFile("input_", ".pdf");
-        Path tempOutputFile = Files.createTempFile("output_", ".pdf");
-        Path sidecarTextPath = null;
+        Files.createDirectories(tempOutputDir);
+        Files.createDirectories(tempImagesDir);
 
         try {
+            // Save input file
             inputFile.transferTo(tempInputFile.toFile());
+            PDFMergerUtility merger = new PDFMergerUtility();
+            merger.setDestinationFileName(finalOutputFile.toString());
 
-            // Run OCR Command
-            String languageOption = String.join("+", selectedLanguages);
+            try (PDDocument document = pdfDocumentFactory.load(tempInputFile.toFile())) {
+                PDFRenderer pdfRenderer = new PDFRenderer(document);
+                int pageCount = document.getNumberOfPages();
 
-            List<String> command =
-                    new ArrayList<>(
-                            Arrays.asList(
-                                    "ocrmypdf",
-                                    "--verbose",
-                                    "2",
-                                    "--output-type",
-                                    "pdf",
-                                    "--pdf-renderer",
-                                    ocrRenderType));
+                for (int pageNum = 0; pageNum < pageCount; pageNum++) {
+                    PDPage page = document.getPage(pageNum);
+                    boolean hasText = false;
 
-            if (sidecar != null && sidecar) {
-                sidecarTextPath = Files.createTempFile("sidecar", ".txt");
-                command.add("--sidecar");
-                command.add(sidecarTextPath.toString());
-            }
+                    // Check for existing text
+                    try (PDDocument tempDoc = new PDDocument()) {
+                        tempDoc.addPage(page);
+                        PDFTextStripper stripper = new PDFTextStripper();
+                        hasText = !stripper.getText(tempDoc).trim().isEmpty();
+                    }
 
-            if (deskew != null && deskew) {
-                command.add("--deskew");
-            }
-            if (clean != null && clean) {
-                command.add("--clean");
-            }
-            if (cleanFinal != null && cleanFinal) {
-                command.add("--clean-final");
-            }
-            if (ocrType != null && !"".equals(ocrType)) {
-                if ("skip-text".equals(ocrType)) {
-                    command.add("--skip-text");
-                } else if ("force-ocr".equals(ocrType)) {
-                    command.add("--force-ocr");
-                } else if ("Normal".equals(ocrType)) {
+                    boolean shouldOcr =
+                            switch (ocrType) {
+                                case "skip-text" -> !hasText;
+                                case "force-ocr" -> true;
+                                default -> true;
+                            };
 
-                }
-            }
+                    Path pageOutputPath =
+                            tempOutputDir.resolve(String.format("page_%d.pdf", pageNum));
 
-            command.addAll(
-                    Arrays.asList(
-                            "--language",
-                            languageOption,
-                            tempInputFile.toString(),
-                            tempOutputFile.toString()));
+                    if (shouldOcr) {
+                        // Convert page to image
+                        BufferedImage image = pdfRenderer.renderImageWithDPI(pageNum, 300);
+                        Path imagePath =
+                                tempImagesDir.resolve(String.format("page_%d.png", pageNum));
+                        ImageIO.write(image, "png", imagePath.toFile());
 
-            // Run CLI command
-            ProcessExecutorResult result =
-                    ProcessExecutor.getInstance(ProcessExecutor.Processes.OCR_MY_PDF)
-                            .runCommandWithOutputHandling(command);
-            if (result.getRc() != 0
-                    && result.getMessages().contains("multiprocessing/synchronize.py")
-                    && result.getMessages()
-                            .contains("OSError: [Errno 38] Function not implemented")) {
-                command.add("--jobs");
-                command.add("1");
-                result =
-                        ProcessExecutor.getInstance(ProcessExecutor.Processes.OCR_MY_PDF)
-                                .runCommandWithOutputHandling(command);
-            }
+                        // Build OCR command
+                        List<String> command = new ArrayList<>();
+                        command.add("tesseract");
+                        command.add(imagePath.toString());
+                        command.add(
+                                tempOutputDir
+                                        .resolve(String.format("page_%d", pageNum))
+                                        .toString());
+                        command.add("-l");
+                        command.add(String.join("+", languages));
+                        command.add("pdf"); // Always output PDF
 
-            // Remove images from the OCR processed PDF if the flag is set to true
-            if (removeImagesAfter != null && removeImagesAfter) {
-                Path tempPdfWithoutImages = Files.createTempFile("output_", "_no_images.pdf");
+                        ProcessBuilder pb = new ProcessBuilder(command);
+                        Process process = pb.start();
 
-                List<String> gsCommand =
-                        Arrays.asList(
-                                "gs",
-                                "-sDEVICE=pdfwrite",
-                                "-dFILTERIMAGE",
-                                "-o",
-                                tempPdfWithoutImages.toString(),
-                                tempOutputFile.toString());
+                        // Capture any error output
+                        try (BufferedReader reader =
+                                new BufferedReader(
+                                        new InputStreamReader(process.getErrorStream()))) {
+                            String line;
+                            while ((line = BoundedLineReader.readLine(reader, 5_000_000)) != null) {
+                                log.debug("Tesseract: {}", line);
+                            }
+                        }
 
-                ProcessExecutor.getInstance(ProcessExecutor.Processes.GHOSTSCRIPT)
-                        .runCommandWithOutputHandling(gsCommand);
-                tempOutputFile = tempPdfWithoutImages;
-            }
-            // Read the OCR processed PDF file
-            byte[] pdfBytes = pdfDocumentFactory.loadToBytes(tempOutputFile.toFile());
+                        int exitCode = process.waitFor();
+                        if (exitCode != 0) {
+                            throw new RuntimeException(
+                                    "Tesseract failed with exit code: " + exitCode);
+                        }
 
-            // Return the OCR processed PDF as a response
-            String outputFilename =
-                    Filenames.toSimpleFileName(inputFile.getOriginalFilename())
-                                    .replaceFirst("[.][^.]+$", "")
-                            + "_OCR.pdf";
-
-            if (sidecar != null && sidecar) {
-                // Create a zip file containing both the PDF and the text file
-                String outputZipFilename =
-                        Filenames.toSimpleFileName(inputFile.getOriginalFilename())
-                                        .replaceFirst("[.][^.]+$", "")
-                                + "_OCR.zip";
-                Path tempZipFile = Files.createTempFile("output_", ".zip");
-
-                try (ZipOutputStream zipOut =
-                        new ZipOutputStream(new FileOutputStream(tempZipFile.toFile()))) {
-                    // Add PDF file to the zip
-                    ZipEntry pdfEntry = new ZipEntry(outputFilename);
-                    zipOut.putNextEntry(pdfEntry);
-                    try (ByteArrayInputStream pdfInputStream = new ByteArrayInputStream(pdfBytes)) {
-                        byte[] buffer = new byte[1024];
-                        int length;
-                        while ((length = pdfInputStream.read(buffer)) != -1) {
-                            zipOut.write(buffer, 0, length);
+                        // Add OCR'd PDF to merger
+                        merger.addSource(pageOutputPath.toFile());
+                    } else {
+                        // Save original page without OCR
+                        try (PDDocument pageDoc = new PDDocument()) {
+                            pageDoc.addPage(page);
+                            pageDoc.save(pageOutputPath.toFile());
+                            merger.addSource(pageOutputPath.toFile());
                         }
                     }
-                    zipOut.closeEntry();
-
-                    // Add text file to the zip
-                    ZipEntry txtEntry = new ZipEntry(outputFilename.replace(".pdf", ".txt"));
-                    zipOut.putNextEntry(txtEntry);
-                    Files.copy(sidecarTextPath, zipOut);
-                    zipOut.closeEntry();
                 }
-
-                byte[] zipBytes = Files.readAllBytes(tempZipFile);
-
-                // Clean up the temporary zip file
-                Files.deleteIfExists(tempZipFile);
-                Files.deleteIfExists(tempOutputFile);
-                Files.deleteIfExists(sidecarTextPath);
-
-                // Return the zip file containing both the PDF and the text file
-                return WebResponseUtils.bytesToWebResponse(
-                        zipBytes, outputZipFilename, MediaType.APPLICATION_OCTET_STREAM);
-            } else {
-                // Return the OCR processed PDF as a response
-                Files.deleteIfExists(tempOutputFile);
-                return WebResponseUtils.bytesToWebResponse(pdfBytes, outputFilename);
             }
+
+            // Merge all pages into final PDF
+            merger.mergeDocuments(null);
+
+            // Read the final PDF file
+            byte[] pdfContent = Files.readAllBytes(finalOutputFile);
+            String outputFilename =
+                    Filenames.toSimpleFileName(inputFile.getOriginalFilename()).replaceFirst("[.][^.]+$", "") + "_OCR.pdf";
+
+            return ResponseEntity.ok()
+                    .header(
+                            "Content-Disposition",
+                            "attachment; filename=\"" + outputFilename + "\"")
+                    .contentType(MediaType.APPLICATION_PDF)
+                    .body(pdfContent);
+
         } finally {
-            // Clean up the temporary files
-            Files.deleteIfExists(tempOutputFile);
-            // Comment out as transferTo makes multipart handle cleanup
-            // Files.deleteIfExists(tempInputFile);
-            if (sidecarTextPath != null) {
-                Files.deleteIfExists(sidecarTextPath);
+            // Clean up temporary files
+            deleteDirectory(tempDir);
+        }
+    }
+
+    private void addFileToZip(File file, String filename, ZipOutputStream zipOut)
+            throws IOException {
+        if (!file.exists()) {
+            log.warn("File {} does not exist, skipping", file);
+            return;
+        }
+
+        try (FileInputStream fis = new FileInputStream(file)) {
+            ZipEntry zipEntry = new ZipEntry(filename);
+            zipOut.putNextEntry(zipEntry);
+
+            byte[] buffer = new byte[1024];
+            int length;
+            while ((length = fis.read(buffer)) >= 0) {
+                zipOut.write(buffer, 0, length);
             }
+
+            zipOut.closeEntry();
+        }
+    }
+
+    private void deleteDirectory(Path directory) {
+        try {
+            Files.walk(directory)
+                    .sorted(Comparator.reverseOrder())
+                    .forEach(
+                            path -> {
+                                try {
+                                    Files.delete(path);
+                                } catch (IOException e) {
+                                    log.error("Error deleting {}: {}", path, e.getMessage());
+                                }
+                            });
+        } catch (IOException e) {
+            log.error("Error walking directory {}: {}", directory, e.getMessage());
         }
     }
 }

src/main/java/stirling/software/SPDF/controller/api/misc/RepairController.java

@@ -44,7 +44,7 @@ public class RepairController {
     @Operation(
             summary = "Repair a PDF file",
             description =
-                    "This endpoint repairs a given PDF file by running Ghostscript command. The PDF is first saved to a temporary location, repaired, read back, and then returned as a response. Input:PDF Output:PDF Type:SISO")
+                    "This endpoint repairs a given PDF file by running qpdf command. The PDF is first saved to a temporary location, repaired, read back, and then returned as a response. Input:PDF Output:PDF Type:SISO")
     public ResponseEntity<byte[]> repairPdf(@ModelAttribute PDFFile request)
             throws IOException, InterruptedException {
         MultipartFile inputFile = request.getFileInput();
@@ -56,14 +56,15 @@ public class RepairController {
         try {
 
             List<String> command = new ArrayList<>();
-            command.add("gs");
-            command.add("-o");
-            command.add(tempOutputFile.toString());
-            command.add("-sDEVICE=pdfwrite");
+            command.add("qpdf");
+            command.add("--replace-input"); // Automatically fixes problems it can
+            command.add("--qdf"); // Linearizes and normalizes PDF structure
+            command.add("--object-streams=disable"); // Can help with some corruptions
             command.add(tempInputFile.toString());
+            command.add(tempOutputFile.toString());
 
             ProcessExecutorResult returnCode =
-                    ProcessExecutor.getInstance(ProcessExecutor.Processes.GHOSTSCRIPT)
+                    ProcessExecutor.getInstance(ProcessExecutor.Processes.QPDF)
                             .runCommandWithOutputHandling(command);
 
             // Read the optimized PDF file

src/main/java/stirling/software/SPDF/controller/api/security/CertSignController.java

@@ -98,10 +98,10 @@ public class CertSignController {
 
         public CreateSignature(KeyStore keystore, char[] pin)
                 throws KeyStoreException,
-                UnrecoverableKeyException,
-                NoSuchAlgorithmException,
-                IOException,
-                CertificateException {
+                        UnrecoverableKeyException,
+                        NoSuchAlgorithmException,
+                        IOException,
+                        CertificateException {
             super(keystore, pin);
             ClassPathResource resource = new ClassPathResource("static/images/signature.png");
             try (InputStream is = resource.getInputStream()) {
@@ -160,7 +160,8 @@ public class CertSignController {
                         extState.setNonStrokingAlphaConstant(0.5f);
                         cs.setGraphicsStateParameters(extState);
                         cs.transform(Matrix.getScaleInstance(0.08f, 0.08f));
-                        PDImageXObject img = PDImageXObject.createFromFileByExtension(logoFile, doc);
+                        PDImageXObject img =
+                                PDImageXObject.createFromFileByExtension(logoFile, doc);
                         cs.drawImage(img, 100, 0);
                         cs.restoreGraphicsState();
                     }
@@ -208,7 +209,10 @@ public class CertSignController {
     }
 
     @PostMapping(consumes = "multipart/form-data", value = "/cert-sign")
-    @Operation(summary = "Sign PDF with a Digital Certificate", description = "This endpoint accepts a PDF file, a digital certificate and related information to sign the PDF. It then returns the digitally signed PDF file. Input:PDF Output:PDF Type:SISO")
+    @Operation(
+            summary = "Sign PDF with a Digital Certificate",
+            description =
+                    "This endpoint accepts a PDF file, a digital certificate and related information to sign the PDF. It then returns the digitally signed PDF file. Input:PDF Output:PDF Type:SISO")
     public ResponseEntity<byte[]> signPDFWithCert(@ModelAttribute SignPDFWithCertRequest request)
             throws Exception {
         MultipartFile pdf = request.getFileInput();
@@ -238,7 +242,7 @@ public class CertSignController {
                 PrivateKey privateKey = getPrivateKeyFromPEM(privateKeyFile.getBytes(), password);
                 Certificate cert = (Certificate) getCertificateFromPEM(certFile.getBytes());
                 ks.setKeyEntry(
-                        "alias", privateKey, password.toCharArray(), new Certificate[] { cert });
+                        "alias", privateKey, password.toCharArray(), new Certificate[] {cert});
                 break;
             case "PKCS12":
                 ks = KeyStore.getInstance("PKCS12");
@@ -310,19 +314,22 @@ public class CertSignController {
 
     private PrivateKey getPrivateKeyFromPEM(byte[] pemBytes, String password)
             throws IOException, OperatorCreationException, PKCSException {
-        try (PEMParser pemParser = new PEMParser(new InputStreamReader(new ByteArrayInputStream(pemBytes)))) {
+        try (PEMParser pemParser =
+                new PEMParser(new InputStreamReader(new ByteArrayInputStream(pemBytes)))) {
             Object pemObject = pemParser.readObject();
             JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider("BC");
             PrivateKeyInfo pkInfo;
             if (pemObject instanceof PKCS8EncryptedPrivateKeyInfo) {
-                InputDecryptorProvider decProv = new JceOpenSSLPKCS8DecryptorProviderBuilder()
-                        .build(password.toCharArray());
+                InputDecryptorProvider decProv =
+                        new JceOpenSSLPKCS8DecryptorProviderBuilder().build(password.toCharArray());
                 pkInfo = ((PKCS8EncryptedPrivateKeyInfo) pemObject).decryptPrivateKeyInfo(decProv);
             } else if (pemObject instanceof PEMEncryptedKeyPair) {
-                PEMDecryptorProvider decProv = new JcePEMDecryptorProviderBuilder().build(password.toCharArray());
-                pkInfo = ((PEMEncryptedKeyPair) pemObject)
-                        .decryptKeyPair(decProv)
-                        .getPrivateKeyInfo();
+                PEMDecryptorProvider decProv =
+                        new JcePEMDecryptorProviderBuilder().build(password.toCharArray());
+                pkInfo =
+                        ((PEMEncryptedKeyPair) pemObject)
+                                .decryptKeyPair(decProv)
+                                .getPrivateKeyInfo();
             } else {
                 pkInfo = ((PEMKeyPair) pemObject).getPrivateKeyInfo();
             }

src/main/java/stirling/software/SPDF/controller/web/HomeWebController.java

@@ -55,6 +55,11 @@ public class HomeWebController {
         return "licenses";
     }
 
+    @GetMapping("/releases")
+    public String getReleaseNotes(Model model) {
+        return "releases";
+    }
+
     @GetMapping("/")
     public String home(Model model) {
         model.addAttribute("currentPage", "home");

src/main/java/stirling/software/SPDF/model/ApplicationProperties.java

@@ -320,12 +320,20 @@ public class ApplicationProperties {
         public static class SessionLimit {
             private int libreOfficeSessionLimit;
             private int pdfToHtmlSessionLimit;
-            private int ocrMyPdfSessionLimit;
             private int pythonOpenCvSessionLimit;
-            private int ghostScriptSessionLimit;
             private int weasyPrintSessionLimit;
             private int installAppSessionLimit;
             private int calibreSessionLimit;
+            private int qpdfSessionLimit;
+            private int tesseractSessionLimit;
+
+            public int getQpdfSessionLimit() {
+                return qpdfSessionLimit > 0 ? qpdfSessionLimit : 2;
+            }
+
+            public int getTesseractSessionLimit() {
+                return tesseractSessionLimit > 0 ? tesseractSessionLimit : 1;
+            }
 
             public int getLibreOfficeSessionLimit() {
                 return libreOfficeSessionLimit > 0 ? libreOfficeSessionLimit : 1;
@@ -335,18 +343,10 @@ public class ApplicationProperties {
                 return pdfToHtmlSessionLimit > 0 ? pdfToHtmlSessionLimit : 1;
             }
 
-            public int getOcrMyPdfSessionLimit() {
-                return ocrMyPdfSessionLimit > 0 ? ocrMyPdfSessionLimit : 2;
-            }
-
             public int getPythonOpenCvSessionLimit() {
                 return pythonOpenCvSessionLimit > 0 ? pythonOpenCvSessionLimit : 8;
             }
 
-            public int getGhostScriptSessionLimit() {
-                return ghostScriptSessionLimit > 0 ? ghostScriptSessionLimit : 16;
-            }
-
             public int getWeasyPrintSessionLimit() {
                 return weasyPrintSessionLimit > 0 ? weasyPrintSessionLimit : 16;
             }
@@ -364,12 +364,20 @@ public class ApplicationProperties {
         public static class TimeoutMinutes {
             private long libreOfficeTimeoutMinutes;
             private long pdfToHtmlTimeoutMinutes;
-            private long ocrMyPdfTimeoutMinutes;
             private long pythonOpenCvTimeoutMinutes;
-            private long ghostScriptTimeoutMinutes;
             private long weasyPrintTimeoutMinutes;
             private long installAppTimeoutMinutes;
             private long calibreTimeoutMinutes;
+            private long tesseractTimeoutMinutes;
+            private long qpdfTimeoutMinutes;
+
+            public long getTesseractTimeoutMinutes() {
+                return tesseractTimeoutMinutes > 0 ? tesseractTimeoutMinutes : 30;
+            }
+
+            public long getQpdfTimeoutMinutes() {
+                return qpdfTimeoutMinutes > 0 ? qpdfTimeoutMinutes : 30;
+            }
 
             public long getLibreOfficeTimeoutMinutes() {
                 return libreOfficeTimeoutMinutes > 0 ? libreOfficeTimeoutMinutes : 30;
@@ -379,18 +387,10 @@ public class ApplicationProperties {
                 return pdfToHtmlTimeoutMinutes > 0 ? pdfToHtmlTimeoutMinutes : 20;
             }
 
-            public long getOcrMyPdfTimeoutMinutes() {
-                return ocrMyPdfTimeoutMinutes > 0 ? ocrMyPdfTimeoutMinutes : 30;
-            }
-
             public long getPythonOpenCvTimeoutMinutes() {
                 return pythonOpenCvTimeoutMinutes > 0 ? pythonOpenCvTimeoutMinutes : 30;
             }
 
-            public long getGhostScriptTimeoutMinutes() {
-                return ghostScriptTimeoutMinutes > 0 ? ghostScriptTimeoutMinutes : 30;
-            }
-
             public long getWeasyPrintTimeoutMinutes() {
                 return weasyPrintTimeoutMinutes > 0 ? weasyPrintTimeoutMinutes : 30;
             }

src/main/java/stirling/software/SPDF/model/api/misc/OptimizePdfRequest.java

@@ -18,4 +18,15 @@ public class OptimizePdfRequest extends PDFFile {
 
     @Schema(description = "The expected output size, e.g. '100MB', '25KB', etc.")
     private String expectedOutputSize;
+
+    @Schema(
+            description = "Whether to linearize the PDF for faster web viewing. Default is false.",
+            defaultValue = "false")
+    private Boolean linearize = false;
+
+    @Schema(
+            description =
+                    "Whether to normalize the PDF content for better compatibility. Default is true.",
+            defaultValue = "true")
+    private Boolean normalize = true;
 }

src/main/java/stirling/software/SPDF/model/api/misc/ProcessPdfWithOcrRequest.java

@@ -15,18 +15,6 @@ public class ProcessPdfWithOcrRequest extends PDFFile {
     @Schema(description = "List of languages to use in OCR processing")
     private List<String> languages;
 
-    @Schema(description = "Include OCR text in a sidecar text file if set to true")
-    private boolean sidecar;
-
-    @Schema(description = "Deskew the input file if set to true")
-    private boolean deskew;
-
-    @Schema(description = "Clean the input file if set to true")
-    private boolean clean;
-
-    @Schema(description = "Clean the final output if set to true")
-    private boolean cleanFinal;
-
     @Schema(
             description = "Specify the OCR type, e.g., 'skip-text', 'force-ocr', or 'Normal'",
             allowableValues = {"skip-text", "force-ocr", "Normal"})
@@ -37,7 +25,4 @@ public class ProcessPdfWithOcrRequest extends PDFFile {
             allowableValues = {"hocr", "sandwich"},
             defaultValue = "hocr")
     private String ocrRenderType = "hocr";
-
-    @Schema(description = "Remove images from the output PDF if set to true")
-    private boolean removeImagesAfter;
 }

src/main/java/stirling/software/SPDF/service/MetricsAggregatorService.java

@@ -34,17 +34,15 @@ public class MetricsAggregatorService {
                         counter -> {
                             String method = counter.getId().getTag("method");
                             String uri = counter.getId().getTag("uri");
-                            
+
                             // Skip if either method or uri is null
                             if (method == null || uri == null) {
                                 return;
                             }
-                
-                            String key = String.format(
-                                "http_requests_%s_%s",
-                                method,
-                                uri.replace("/", "_")
-                            );
+
+                            String key =
+                                    String.format(
+                                            "http_requests_%s_%s", method, uri.replace("/", "_"));
 
                             double currentCount = counter.count();
                             double lastCount = lastSentMetrics.getOrDefault(key, 0.0);

src/main/java/stirling/software/SPDF/service/PostHogService.java

@@ -31,7 +31,7 @@ public class PostHogService {
     private final ApplicationProperties applicationProperties;
     private final UserServiceInterface userService;
     private final Environment env;
-    
+
     @Autowired
     public PostHogService(
             PostHog postHog,
@@ -71,16 +71,16 @@ public class PostHogService {
         Map<String, Object> metrics = new HashMap<>();
 
         try {
-        	//Application version
-        	metrics.put("app_version", appVersion);
-        	 String deploymentType = "JAR"; // default
-             if ("true".equalsIgnoreCase(env.getProperty("BROWSER_OPEN"))) {
-                 deploymentType = "EXE";
-             } else if (isRunningInDocker()) {
-                 deploymentType = "DOCKER";
-             }
-             metrics.put("deployment_type", deploymentType);
-        	
+            // Application version
+            metrics.put("app_version", appVersion);
+            String deploymentType = "JAR"; // default
+            if ("true".equalsIgnoreCase(env.getProperty("BROWSER_OPEN"))) {
+                deploymentType = "EXE";
+            } else if (isRunningInDocker()) {
+                deploymentType = "DOCKER";
+            }
+            metrics.put("deployment_type", deploymentType);
+
             // System info
             metrics.put("os_name", System.getProperty("os.name"));
             metrics.put("os_version", System.getProperty("os.version"));

src/main/java/stirling/software/SPDF/utils/ProcessExecutor.java

@@ -29,12 +29,12 @@ public class ProcessExecutor {
     public enum Processes {
         LIBRE_OFFICE,
         PDFTOHTML,
-        OCR_MY_PDF,
         PYTHON_OPENCV,
-        GHOSTSCRIPT,
         WEASYPRINT,
         INSTALL_APP,
-        CALIBRE
+        CALIBRE,
+        TESSERACT,
+        QPDF
     }
 
     private static final Map<Processes, ProcessExecutor> instances = new ConcurrentHashMap<>();
@@ -59,21 +59,11 @@ public class ProcessExecutor {
                                                 .getProcessExecutor()
                                                 .getSessionLimit()
                                                 .getPdfToHtmlSessionLimit();
-                                case OCR_MY_PDF ->
-                                        applicationProperties
-                                                .getProcessExecutor()
-                                                .getSessionLimit()
-                                                .getOcrMyPdfSessionLimit();
                                 case PYTHON_OPENCV ->
                                         applicationProperties
                                                 .getProcessExecutor()
                                                 .getSessionLimit()
                                                 .getPythonOpenCvSessionLimit();
-                                case GHOSTSCRIPT ->
-                                        applicationProperties
-                                                .getProcessExecutor()
-                                                .getSessionLimit()
-                                                .getGhostScriptSessionLimit();
                                 case WEASYPRINT ->
                                         applicationProperties
                                                 .getProcessExecutor()
@@ -84,6 +74,16 @@ public class ProcessExecutor {
                                                 .getProcessExecutor()
                                                 .getSessionLimit()
                                                 .getInstallAppSessionLimit();
+                                case TESSERACT ->
+                                        applicationProperties
+                                                .getProcessExecutor()
+                                                .getSessionLimit()
+                                                .getTesseractSessionLimit();
+                                case QPDF ->
+                                        applicationProperties
+                                                .getProcessExecutor()
+                                                .getSessionLimit()
+                                                .getQpdfSessionLimit();
                                 case CALIBRE ->
                                         applicationProperties
                                                 .getProcessExecutor()
@@ -103,21 +103,11 @@ public class ProcessExecutor {
                                                 .getProcessExecutor()
                                                 .getTimeoutMinutes()
                                                 .getPdfToHtmlTimeoutMinutes();
-                                case OCR_MY_PDF ->
-                                        applicationProperties
-                                                .getProcessExecutor()
-                                                .getTimeoutMinutes()
-                                                .getOcrMyPdfTimeoutMinutes();
                                 case PYTHON_OPENCV ->
                                         applicationProperties
                                                 .getProcessExecutor()
                                                 .getTimeoutMinutes()
                                                 .getPythonOpenCvTimeoutMinutes();
-                                case GHOSTSCRIPT ->
-                                        applicationProperties
-                                                .getProcessExecutor()
-                                                .getTimeoutMinutes()
-                                                .getGhostScriptTimeoutMinutes();
                                 case WEASYPRINT ->
                                         applicationProperties
                                                 .getProcessExecutor()
@@ -128,6 +118,16 @@ public class ProcessExecutor {
                                                 .getProcessExecutor()
                                                 .getTimeoutMinutes()
                                                 .getInstallAppTimeoutMinutes();
+                                case TESSERACT ->
+                                        applicationProperties
+                                                .getProcessExecutor()
+                                                .getTimeoutMinutes()
+                                                .getTesseractTimeoutMinutes();
+                                case QPDF ->
+                                        applicationProperties
+                                                .getProcessExecutor()
+                                                .getTimeoutMinutes()
+                                                .getQpdfTimeoutMinutes();
                                 case CALIBRE ->
                                         applicationProperties
                                                 .getProcessExecutor()

src/main/resources/messages_ar_AR.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=وضع التعرف الضوئي على الحروف
 ocr.selectText.11=إزالة الصور بعد التعرف الضوئي على الحروف (يزيل كل الصور، يكون مفيدًا فقط إذا كان جزءًا من خطوة التحويل)
 ocr.selectText.12=نوع العرض (متقدم)
 ocr.help=يرجى قراءة هذه الوثائق حول كيفية استخدام هذا للغات أخرى و/أو الاستخدام ليس في Docker
-ocr.credit=تستخدم هذه الخدمة OCRmyPDF و Tesseract للتعرف الضوئي على الحروف.
+ocr.credit=تستخدم هذه الخدمة qpdf و Tesseract للتعرف الضوئي على الحروف.
 ocr.submit=معالجة PDF باستخدام OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=تحويل إلى PDF
 #compress
 compress.title=ضغط
 compress.header=ضغط ملف PDF
-compress.credit=تستخدم هذه الخدمة OCRmyPDF لضغط / تحسين PDF.
+compress.credit=تستخدم هذه الخدمة qpdf لضغط / تحسين PDF.
 compress.selectText.1=الوضع اليدوي - من 1 إلى 4
 compress.selectText.2=مستوى التحسين:
 compress.selectText.3=4 (رهيب للصور النصية)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=تغيير
 #pdfToPDFA
 pdfToPDFA.title=PDF إلى PDF/A
 pdfToPDFA.header=PDF إلى PDF/A
-pdfToPDFA.credit=تستخدم هذه الخدمة ghostscript لتحويل PDF/A.
+pdfToPDFA.credit=تستخدم هذه الخدمة qpdf لتحويل PDF/A.
 pdfToPDFA.submit=تحويل
 pdfToPDFA.tip=لا يعمل حاليًا لمدخلات متعددة في وقت واحد
 pdfToPDFA.outputFormat=تنسيق الإخراج

src/main/resources/messages_az_AZ.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR Mode
 ocr.selectText.11=Remove images after OCR (Removes ALL images, only useful if part of conversion step)
 ocr.selectText.12=Render Type (Advanced)
 ocr.help=Please read this documentation on how to use this for other languages and/or use not in docker
-ocr.credit=This service uses OCRmyPDF and Tesseract for OCR.
+ocr.credit=This service uses qpdf and Tesseract for OCR.
 ocr.submit=Process PDF with OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=PDF-ə Çevir
 #compress
 compress.title=Compress
 compress.header=Compress PDF
-compress.credit=This service uses Ghostscript for PDF Compress/Optimisation.
+compress.credit=This service uses qpdf for PDF Compress/Optimisation.
 compress.selectText.1=Manual Mode - From 1 to 4
 compress.selectText.2=Optimization level:
 compress.selectText.3=4 (Terrible for text images)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Change
 #pdfToPDFA
 pdfToPDFA.title=PDF To PDF/A
 pdfToPDFA.header=PDF To PDF/A
-pdfToPDFA.credit=This service uses ghostscript for PDF/A conversion
+pdfToPDFA.credit=This service uses qpdf for PDF/A conversion
 pdfToPDFA.submit=Convert
 pdfToPDFA.tip=Currently does not work for multiple inputs at once
 pdfToPDFA.outputFormat=Output format

src/main/resources/messages_bg_BG.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR режим
 ocr.selectText.11=Премахване на изображения след OCR (Премахва ВСИЧКИ изображения, полезно само ако е част от стъпката на преобразуване)
 ocr.selectText.12=Тип изобразяване (Разширен)
 ocr.help=Моля, прочетете тази документация за това как да използвате това за други езици и/или да не използвате в docker
-ocr.credit=Тази услуга използва OCRmyPDF и Tesseract за OCR.
+ocr.credit=Тази услуга използва qpdf и Tesseract за OCR.
 ocr.submit=Обработка на PDF чрез OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Преобразуване към PDF
 #compress
 compress.title=Компресиране
 compress.header=Компресиране на PDF
-compress.credit=Тази услуга използва Ghostscript за PDF компресиране/оптимизиране.
+compress.credit=Тази услуга използва qpdf за PDF компресиране/оптимизиране.
 compress.selectText.1=Ръчен режим - от 1 до 4
 compress.selectText.2=Ниво на оптимизация:
 compress.selectText.3=4 (Ужасно за текстови изображения)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Промени
 #pdfToPDFA
 pdfToPDFA.title=PDF към PDF/A
 pdfToPDFA.header=PDF към PDF/A
-pdfToPDFA.credit=Тази услуга използва ghostscript за PDF/A преобразуване.
+pdfToPDFA.credit=Тази услуга използва qpdf за PDF/A преобразуване.
 pdfToPDFA.submit=Преобразуване
 pdfToPDFA.tip=В момента не работи за няколко входа наведнъж
 pdfToPDFA.outputFormat=Изходен формат

src/main/resources/messages_ca_CA.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Mode OCR
 ocr.selectText.11=Elimina Imatges després de l'OCR (Elimina TOTES les imatges, útil si forma part d'un procés de conversió)
 ocr.selectText.12=Tipus de Renderització (Avançat)
 ocr.help=Llegeix aquesta documentació sobre com utilitzar-la per a altres idiomes i/o no utilitzar-la a Docker
-ocr.credit=Aquest servei fa servir OCRmyPDF i Tesseract per a OCR.
+ocr.credit=Aquest servei fa servir qpdf i Tesseract per a OCR.
 ocr.submit=Processa PDF amb OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Converteix a PDF
 #compress
 compress.title=Comprimir
 compress.header=Comprimir PDF
-compress.credit=Aquest servei utilitza Ghostscript per a la compressió/optimització de PDF.
+compress.credit=Aquest servei utilitza qpdf per a la compressió/optimització de PDF.
 compress.selectText.1=Mode manual: de l'1 al 4
 compress.selectText.2=Nivell d'optimització:
 compress.selectText.3=4 (terrible per a imatges de text)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Canvia
 #pdfToPDFA
 pdfToPDFA.title=PDF a PDF/A
 pdfToPDFA.header=PDF a PDF/A
-pdfToPDFA.credit=Utilitza Ghostscript per a la conversió a PDF/A
+pdfToPDFA.credit=Utilitza qpdf per a la conversió a PDF/A
 pdfToPDFA.submit=Converteix
 pdfToPDFA.tip=Actualment no funciona per a múltiples entrades al mateix temps
 pdfToPDFA.outputFormat=Format de sortida

src/main/resources/messages_cs_CZ.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Režim OCR
 ocr.selectText.11=Odstranit obrázky po OCR (Odstraní VŠECHNY obrázky, užitečné pouze jako součást kroku konverze)
 ocr.selectText.12=Typ vykreslení (Pokročilé)
 ocr.help=Prosím, přečtěte si tuto dokumentaci o použití pro jiné jazyky a/nebo použití mimo Docker
-ocr.credit=Tato služba používá OCRmyPDF a Tesseract pro OCR.
+ocr.credit=Tato služba používá qpdf a Tesseract pro OCR.
 ocr.submit=Zpracovat PDF s OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Převést na PDF
 #compress
 compress.title=Komprese
 compress.header=Komprimovat PDF
-compress.credit=Tato služba používá Ghostscript pro kompresi/optimalizaci PDF.
+compress.credit=Tato služba používá qpdf pro kompresi/optimalizaci PDF.
 compress.selectText.1=Ruční režim - Od 1 do 4
 compress.selectText.2=Úroveň optimalizace:
 compress.selectText.3=4 (Hrozné pro textové obrázky)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Změnit
 #pdfToPDFA
 pdfToPDFA.title=PDF na PDF/A
 pdfToPDFA.header=PDF na PDF/A
-pdfToPDFA.credit=Tato služba používá ghostscript pro konverzi do formátu PDF/A
+pdfToPDFA.credit=Tato služba používá qpdf pro konverzi do formátu PDF/A
 pdfToPDFA.submit=Převést
 pdfToPDFA.tip=V současné době nepracuje pro více vstupů najednou
 pdfToPDFA.outputFormat=Výstupní formát

src/main/resources/messages_da_DK.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR-tilstand
 ocr.selectText.11=Fjern billeder efter OCR (Fjerner ALLE billeder, kun nyttigt hvis det er en del af konverteringstrinnet)
 ocr.selectText.12=Renderingstype (Avanceret)
 ocr.help=Læs venligst denne dokumentation om, hvordan man bruger dette til andre sprog og/eller brug uden for docker
-ocr.credit=Denne tjeneste bruger OCRmyPDF og Tesseract til OCR.
+ocr.credit=Denne tjeneste bruger qpdf og Tesseract til OCR.
 ocr.submit=Behandl PDF med OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Konvertér til PDF
 #compress
 compress.title=Komprimer
 compress.header=Komprimer PDF
-compress.credit=Denne tjeneste bruger Ghostscript til PDF Komprimering/Optimering.
+compress.credit=Denne tjeneste bruger qpdf til PDF Komprimering/Optimering.
 compress.selectText.1=Manuel Tilstand - Fra 1 til 4
 compress.selectText.2=Optimeringsniveau:
 compress.selectText.3=4 (Forfærdelig for tekstbilleder)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Ændre
 #pdfToPDFA
 pdfToPDFA.title=PDF Til PDF/A
 pdfToPDFA.header=PDF Til PDF/A
-pdfToPDFA.credit=Denne tjeneste bruger ghostscript til PDF/A-konvertering
+pdfToPDFA.credit=Denne tjeneste bruger qpdf til PDF/A-konvertering
 pdfToPDFA.submit=Konvertér
 pdfToPDFA.tip=Fungerer i øjeblikket ikke for flere input på én gang
 pdfToPDFA.outputFormat=Outputformat

src/main/resources/messages_de_DE.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR-Modus
 ocr.selectText.11=Bilder nach OCR entfernen (Entfernt ALLE Bilder, nur sinnvoll, wenn Teil des Konvertierungsschritts)
 ocr.selectText.12=Rendertyp (Erweitert)
 ocr.help=Bitte lesen Sie diese Dokumentation, um zu erfahren, wie Sie dies für andere Sprachen verwenden und/oder nicht in Docker verwenden können
-ocr.credit=Dieser Dienst verwendet OCRmyPDF und Tesseract für OCR.
+ocr.credit=Dieser Dienst verwendet qpdf und Tesseract für OCR.
 ocr.submit=PDF mit OCR verarbeiten
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=In PDF konvertieren
 #compress
 compress.title=Komprimieren
 compress.header=PDF komprimieren
-compress.credit=Dieser Dienst verwendet Ghostscript für die PDF-Komprimierung/-Optimierung.
+compress.credit=Dieser Dienst verwendet qpdf für die PDF-Komprimierung/-Optimierung.
 compress.selectText.1=Manueller Modus – Von 1 bis 4
 compress.selectText.2=Optimierungsstufe:
 compress.selectText.3=4 (Schrecklich für Textbilder)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Ändern
 #pdfToPDFA
 pdfToPDFA.title=PDF zu PDF/A
 pdfToPDFA.header=PDF zu PDF/A
-pdfToPDFA.credit=Dieser Dienst verwendet ghostscript für die PDF/A-Konvertierung
+pdfToPDFA.credit=Dieser Dienst verwendet qpdf für die PDF/A-Konvertierung
 pdfToPDFA.submit=Konvertieren
 pdfToPDFA.tip=Dieser Dienst kann nur einzelne Eingangsdateien verarbeiten.
 pdfToPDFA.outputFormat=Ausgabeformat

src/main/resources/messages_el_GR.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Λειτουργία OCR
 ocr.selectText.11=Κατάργηση εικόνων μετά το OCR (Καταργεί ΟΛΕΣ τις εικόνες, είναι χρήσιμο μόνο αν αποτελεί μέρος του βήματος μετατροπής)
 ocr.selectText.12=Τύπος απόδοσης (Για προχωρημένους)
 ocr.help=Διαβάστε αυτήν την τεκμηρίωση σχετικά με τον τρόπο χρήσης αυτής για άλλες γλώσσες ή/και μη χρήσης σε docker
-ocr.credit=Αυτή η υπηρεσία χρησιμοποιεί OCRmyPDF και Tesseract για OCR.
+ocr.credit=Αυτή η υπηρεσία χρησιμοποιεί qpdf και Tesseract για OCR.
 ocr.submit=Επεξεργασία PDF με OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Μετατροπή σε PDF
 #compress
 compress.title=Συμπίεση
 compress.header=Συμπίεση PDF
-compress.credit=Αυτή η υπηρεσία χρησιμοποιεί Ghostscript για PDF Συμπίεση/Βελτιστοποίηση.
+compress.credit=Αυτή η υπηρεσία χρησιμοποιεί qpdf για PDF Συμπίεση/Βελτιστοποίηση.
 compress.selectText.1=Χειροκίνητη Λειτουργία - Από 1 έως 4
 compress.selectText.2=Επίπεδο Βελτιστοποίησης:
 compress.selectText.3=4 (Πολύ κακό για εικόνες κειμένου)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Αλλαγή
 #pdfToPDFA
 pdfToPDFA.title=PDF σε PDF/A
 pdfToPDFA.header=PDF σε PDF/A
-pdfToPDFA.credit=Αυτή η υπηρεσία χρησιμοποιεί ghostscript για PDF/A μετατροπή
+pdfToPDFA.credit=Αυτή η υπηρεσία χρησιμοποιεί qpdf για PDF/A μετατροπή
 pdfToPDFA.submit=Μετατροπή
 pdfToPDFA.tip=Προς το παρόν δεν λειτουργεί για πολλαπλές εισόδους ταυτόχρονα
 pdfToPDFA.outputFormat=Εξόδος αναμορφώσεων

src/main/resources/messages_en_GB.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR Mode
 ocr.selectText.11=Remove images after OCR (Removes ALL images, only useful if part of conversion step)
 ocr.selectText.12=Render Type (Advanced)
 ocr.help=Please read this documentation on how to use this for other languages and/or use not in docker
-ocr.credit=This service uses OCRmyPDF and Tesseract for OCR.
+ocr.credit=This service uses qpdf and Tesseract for OCR.
 ocr.submit=Process PDF with OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Convert to PDF
 #compress
 compress.title=Compress
 compress.header=Compress PDF
-compress.credit=This service uses Ghostscript for PDF Compress/Optimisation.
+compress.credit=This service uses qpdf for PDF Compress/Optimisation.
 compress.selectText.1=Manual Mode - From 1 to 4
 compress.selectText.2=Optimization level:
 compress.selectText.3=4 (Terrible for text images)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Change
 #pdfToPDFA
 pdfToPDFA.title=PDF To PDF/A
 pdfToPDFA.header=PDF To PDF/A
-pdfToPDFA.credit=This service uses ghostscript for PDF/A conversion
+pdfToPDFA.credit=This service uses qpdf for PDF/A conversion
 pdfToPDFA.submit=Convert
 pdfToPDFA.tip=Currently does not work for multiple inputs at once
 pdfToPDFA.outputFormat=Output format
@@ -1260,3 +1260,11 @@ splitByChapters.desc.2=Bookmark Level: Choose the level of bookmarks to use for
 splitByChapters.desc.3=Include Metadata: If checked, the original PDF's metadata will be included in each split PDF.
 splitByChapters.desc.4=Allow Duplicates: If checked, allows multiple bookmarks on the same page to create separate PDFs.
 splitByChapters.submit=Split PDF
+
+
+#release notes
+releases.footer=Releases
+releases.title=Release Notes
+releases.header=Release Notes
+releases.current.version=Current Release
+releases.note=Release notes are only available in English

src/main/resources/messages_en_US.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR Mode
 ocr.selectText.11=Remove images after OCR (Removes ALL images, only useful if part of conversion step)
 ocr.selectText.12=Render Type (Advanced)
 ocr.help=Please read this documentation on how to use this for other languages and/or use not in docker
-ocr.credit=This service uses OCRmyPDF and Tesseract for OCR.
+ocr.credit=This service uses qpdf and Tesseract for OCR.
 ocr.submit=Process PDF with OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Convert to PDF
 #compress
 compress.title=Compress
 compress.header=Compress PDF
-compress.credit=This service uses Ghostscript for PDF Compress/Optimisation.
+compress.credit=This service uses qpdf for PDF Compress/Optimisation.
 compress.selectText.1=Manual Mode - From 1 to 4
 compress.selectText.2=Optimization level:
 compress.selectText.3=4 (Terrible for text images)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Change
 #pdfToPDFA
 pdfToPDFA.title=PDF To PDF/A
 pdfToPDFA.header=PDF To PDF/A
-pdfToPDFA.credit=This service uses ghostscript for PDF/A conversion
+pdfToPDFA.credit=This service uses qpdf for PDF/A conversion
 pdfToPDFA.submit=Convert
 pdfToPDFA.tip=Currently does not work for multiple inputs at once
 pdfToPDFA.outputFormat=Output format

src/main/resources/messages_es_ES.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Modo OCR
 ocr.selectText.11=Eliminar imágenes después de OCR (Elimina TODAS las imágenes, solo es útil si es parte del paso de conversión)
 ocr.selectText.12=Tipo de procesamiento (avanzado)
 ocr.help=Lea esta documentación sobre cómo usar esto para otros idiomas y/o no usarlo en Docker
-ocr.credit=Este servicio utiliza OCRmyPDF y Tesseract para OCR
+ocr.credit=Este servicio utiliza qpdf y Tesseract para OCR
 ocr.submit=Procesar PDF con OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Convertir a PDF
 #compress
 compress.title=Comprimir
 compress.header=Comprimir PDF
-compress.credit=Este servicio utiliza Ghostscript para compresión/optimización de PDF
+compress.credit=Este servicio utiliza qpdf para compresión/optimización de PDF
 compress.selectText.1=Modo manual - De 1 a 4
 compress.selectText.2=Nivel de optimización:
 compress.selectText.3=4 (Terrible para imágenes de texto)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Cambiar
 #pdfToPDFA
 pdfToPDFA.title=PDF a PDF/A
 pdfToPDFA.header=PDF a PDF/A
-pdfToPDFA.credit=Este servicio usa ghostscript para la conversión a PDF/A
+pdfToPDFA.credit=Este servicio usa qpdf para la conversión a PDF/A
 pdfToPDFA.submit=Convertir
 pdfToPDFA.tip=Actualmente no funciona para múltiples entrada a la vez
 pdfToPDFA.outputFormat=Formato de salida

src/main/resources/messages_eu_ES.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR modua
 ocr.selectText.11=Irudiak ezabatu OCR-ren ondoren (Irudi GUZTIAK ezabatzen ditu, bakarrik da erabilgarri bihurketa urratsaren parte baldin bada)
 ocr.selectText.12=Prozesaketa-mota (aurreratua)
 ocr.help=Irakurri honen erabilerari buruzko dokumentazioa beste hizkuntza batzuetarako eta/edo ez erabili Docker-en
-ocr.credit=Zerbitzu honek OCRmyPDF eta OCR-rako Tesseract erabiltzen ditu
+ocr.credit=Zerbitzu honek qpdf eta OCR-rako Tesseract erabiltzen ditu
 ocr.submit=PDF prozesatu OCR-rekin
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=PDF bihurtu
 #compress
 compress.title=Konprimatu
 compress.header=PDFa konprimatu
-compress.credit=Zerbitzu honek Ghostscript erabiltzen du PDFak komprimatzeko/optimizatzeko
+compress.credit=Zerbitzu honek qpdf erabiltzen du PDFak komprimatzeko/optimizatzeko
 compress.selectText.1=Eskuz 1etik 4ra
 compress.selectText.2=Optimizazio maila:
 compress.selectText.3=4 (Izugarria testu-irudietarako)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Aldatu
 #pdfToPDFA
 pdfToPDFA.title=PDFa PDF/A bihurtu
 pdfToPDFA.header=PDFa PDF/A bihurtu
-pdfToPDFA.credit=Zerbitzu honek ghostscript erabiltzen du PDFak PDF/A bihurtzeko
+pdfToPDFA.credit=Zerbitzu honek qpdf erabiltzen du PDFak PDF/A bihurtzeko
 pdfToPDFA.submit=Bihurtu
 pdfToPDFA.tip=Currently does not work for multiple inputs at once
 pdfToPDFA.outputFormat=Output format

src/main/resources/messages_fr_FR.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Mode OCR
 ocr.selectText.11=Supprimer les images après l'OCR (Supprime TOUTES les images, utile uniquement si elles font partie de l'étape de conversion)
 ocr.selectText.12=Type de rendu (avancé)
 ocr.help=Veuillez lire cette documentation pour savoir comment utiliser l'OCR pour d'autres langues ou une utilisation hors Docker :
-ocr.credit=Ce service utilise OCRmyPDF et Tesseract pour l'OCR.
+ocr.credit=Ce service utilise qpdf et Tesseract pour l'OCR.
 ocr.submit=Traiter
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Convertir
 #compress
 compress.title=Compresser un PDF
 compress.header=Compresser un PDF (lorsque c'est possible!)
-compress.credit=Ce service utilise Ghostscript pour la compression et l'optimisation des PDF.
+compress.credit=Ce service utilise qpdf pour la compression et l'optimisation des PDF.
 compress.selectText.1=Mode manuel – de 1 à 4
 compress.selectText.2=Niveau d'optimisation
 compress.selectText.3=4 (terrible pour les images textuelles)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Modifier
 #pdfToPDFA
 pdfToPDFA.title=PDF en PDF/A
 pdfToPDFA.header=PDF en PDF/A
-pdfToPDFA.credit=Ce service utilise ghostscript pour la conversion en PDF/A.
+pdfToPDFA.credit=Ce service utilise qpdf pour la conversion en PDF/A.
 pdfToPDFA.submit=Convertir
 pdfToPDFA.tip=Ne fonctionne actuellement pas pour plusieurs entrées à la fois
 pdfToPDFA.outputFormat=Format de sortie

src/main/resources/messages_ga_IE.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Mód OCR
 ocr.selectText.11=Bain íomhánna tar éis OCR (Bain GACH íomhá, ní úsáideach ach amháin má tá siad mar chuid den chéim tiontaithe)
 ocr.selectText.12=Cineál Rindreála (Ardleibhéal)
 ocr.help=Léigh le do thoil an doiciméadú seo ar conas é seo a úsáid do theangacha eile agus/nó úsáid nach bhfuil i ndugairí
-ocr.credit=Úsáideann an tseirbhís seo OCRmyPDF agus Tesseract le haghaidh OCR.
+ocr.credit=Úsáideann an tseirbhís seo qpdf agus Tesseract le haghaidh OCR.
 ocr.submit=Próiseáil PDF le OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Tiontaigh go PDF
 #compress
 compress.title=Comhbhrúigh
 compress.header=Comhbhrúigh PDF
-compress.credit=Úsáideann an tseirbhís seo Ghostscript le haghaidh Comhbhrú/Optimization PDF.
+compress.credit=Úsáideann an tseirbhís seo qpdf le haghaidh Comhbhrú/Optimization PDF.
 compress.selectText.1=Mód Láimhe - Ó 1 go 4
 compress.selectText.2=Leibhéal optamaithe:
 compress.selectText.3=4 (Uafásach le haghaidh íomhánna téacs)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Athrú
 #pdfToPDFA
 pdfToPDFA.title=PDF Go PDF/A
 pdfToPDFA.header=PDF Go PDF/A
-pdfToPDFA.credit=Úsáideann an tseirbhís seo ghostscript chun PDF/A a thiontú
+pdfToPDFA.credit=Úsáideann an tseirbhís seo qpdf chun PDF/A a thiontú
 pdfToPDFA.submit=Tiontaigh
 pdfToPDFA.tip=Faoi láthair ní oibríonn sé le haghaidh ionchuir iolracha ag an am céanna
 pdfToPDFA.outputFormat=Formáid aschuir

src/main/resources/messages_hi_IN.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR मोड
 ocr.selectText.11=OCR के बाद छवियां हटाएँ (सभी छवियां हटाएँ, केवल परिवर्तन चरण का हिस्सा होता है)
 ocr.selectText.12=रेंडर टाइप (उन्नत)
 ocr.help=कृपया इस डॉक्यूमेंटेशन को पढ़ें कि इसे अन्य भाषाओं के लिए कैसे उपयोग किया जाता है और/या डॉकर में नहीं हैं
-ocr.credit=इस सेवा में OCRmyPDF और टेसरेक्ट का उपयोग होता है।
+ocr.credit=इस सेवा में qpdf और टेसरेक्ट का उपयोग होता है।
 ocr.submit=OCR के साथ PDF प्रोसेस करें
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=पीडीएफ़ में बदलें
 #compress
 compress.title=संकुचित करें
 compress.header=PDF को संकुचित करें
-compress.credit=यह सेवा PDF संकुचन/अनुकूलन के लिए Ghostscript का उपयोग करती है।
+compress.credit=यह सेवा PDF संकुचन/अनुकूलन के लिए qpdf का उपयोग करती है।
 compress.selectText.1=मैनुअल मोड - 1 से 4 तक
 compress.selectText.2=अनुकूलन स्तर:
 compress.selectText.3=4 (पाठ छवियों के लिए अत्यधिक)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=बदलें
 #pdfToPDFA
 pdfToPDFA.title=PDF से PDF/A में
 pdfToPDFA.header=PDF से PDF/A में
-pdfToPDFA.credit=इस सेवा में PDF/A परिवर्तन के लिए ghostscript का उपयोग किया जाता है।
+pdfToPDFA.credit=इस सेवा में PDF/A परिवर्तन के लिए qpdf का उपयोग किया जाता है।
 pdfToPDFA.submit=परिवर्तित करें
 pdfToPDFA.tip=यह सैकड़ों प्रविष्टियाँ एक ही समय में काम करते हैं
 pdfToPDFA.outputFormat=आउटपुट फॉर्मेट

src/main/resources/messages_hr_HR.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR način
 ocr.selectText.11=Ukloni slike nakon OCR-a (Uklanja SVE slike, korisno samo ako je dio koraka konverzije)
 ocr.selectText.12=Vrsta iscrtavanja (napredno)
 ocr.help=Pročitajte ovu dokumentaciju o tome kako ovo koristiti za druge jezike i/ili koristiti ne u dockeru
-ocr.credit=Ova usluga koristi OCRmyPDF i Tesseract za OCR.
+ocr.credit=Ova usluga koristi qpdf i Tesseract za OCR.
 ocr.submit=Obradi PDF sa OCR-om
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Pretvori u PDF
 #compress
 compress.title=Komprimirajte
 compress.header=Komprimirajte PDF
-compress.credit=Ova usluga koristi Ghostscript za komprimiranje / optimizaciju PDF-a.
+compress.credit=Ova usluga koristi qpdf za komprimiranje / optimizaciju PDF-a.
 compress.selectText.1=Ručni režim - Od 1 do 4
 compress.selectText.2=Nivo optimizacije:
 compress.selectText.3=4 (Užasno za tekstualne slike)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Promijeniti
 #pdfToPDFA
 pdfToPDFA.title=PDF u PDF/A
 pdfToPDFA.header=PDF u PDF/A
-pdfToPDFA.credit=Ova usluga koristi ghostscript za PDF/A pretvorbu
+pdfToPDFA.credit=Ova usluga koristi qpdf za PDF/A pretvorbu
 pdfToPDFA.submit=Pretvoriti
 pdfToPDFA.tip=Trenutno ne radi za više unosa odjednom
 pdfToPDFA.outputFormat=Izlazni format

src/main/resources/messages_hu_HU.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR mód
 ocr.selectText.11=Képek eltávolítása OCR után (Az ÖSSZES kép eltávolítása, csak akkor hasznos, ha a konverzió része)
 ocr.selectText.12=Render típusa (Speciális)
 ocr.help=Kérjük, olvassa el ezt a dokumentációt az egyéb nyelvek használatához és/vagy a nem Docker-es használathoz.
-ocr.credit=Ez a szolgáltatás az OCRmyPDF és a Tesseract OCR használatával működik.
+ocr.credit=Ez a szolgáltatás az qpdf és a Tesseract OCR használatával működik.
 ocr.submit=PDF feldolgozása OCR-rel
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Konvertálás PDF dokumentummá
 #compress
 compress.title=Tömörítés
 compress.header=PDF tömörítése
-compress.credit=Ez a szolgáltatás a Ghostscript-et használja a PDF tömörítéséhez/optimalizálásához.
+compress.credit=Ez a szolgáltatás a qpdf-et használja a PDF tömörítéséhez/optimalizálásához.
 compress.selectText.1=Kézi mód - 1-től 4-ig
 compress.selectText.2=Optimalizálási szint:
 compress.selectText.3=4 (nem ajánlott a szöveges képekhez)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Módosítás
 #pdfToPDFA
 pdfToPDFA.title=PDF >> PDF/A
 pdfToPDFA.header=PDF >> PDF/A
-pdfToPDFA.credit=Ez a szolgáltatás az ghostscript-t használja a PDF/A konverzióhoz
+pdfToPDFA.credit=Ez a szolgáltatás az qpdf-t használja a PDF/A konverzióhoz
 pdfToPDFA.submit=Konvertálás
 pdfToPDFA.tip=Jelenleg egyszerre több fájl nem működik ezzel a funkcióval
 pdfToPDFA.outputFormat=Kimeneti formátum

src/main/resources/messages_id_ID.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Mode OCR
 ocr.selectText.11=Hapus gambar setelah OCR (Menghapus Semua gambar, hanya berguna jika merupakan bagian dari langkah konversi)
 ocr.selectText.12=Jenis Render (Lanjutan)
 ocr.help=Silakan baca dokumentasi ini tentang cara menggunakan ini untuk bahasa lain dan/atau penggunaan yang tidak ada di docker
-ocr.credit=Layanan ini menggunakan OCRmyPDF dan Tesseract untuk OCR.
+ocr.credit=Layanan ini menggunakan qpdf dan Tesseract untuk OCR.
 ocr.submit=Memproses PDF dengan OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Konversi ke PDF
 #compress
 compress.title=Kompres
 compress.header=Kompres PDF
-compress.credit=Layanan ini menggunakan Ghostscript untuk Kompresi/Optimalisasi PDF.
+compress.credit=Layanan ini menggunakan qpdf untuk Kompresi/Optimalisasi PDF.
 compress.selectText.1=Mode Manual - Dari 1 hingga 4
 compress.selectText.2=Tingkat Optimalisasi:
 compress.selectText.3=4 (Buruk untuk gambar teks)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Ganti
 #pdfToPDFA
 pdfToPDFA.title=PDF Ke PDF/A
 pdfToPDFA.header=PDF ke PDF/A
-pdfToPDFA.credit=Layanan ini menggunakan ghostscript untuk konversi PDF/A.
+pdfToPDFA.credit=Layanan ini menggunakan qpdf untuk konversi PDF/A.
 pdfToPDFA.submit=Konversi
 pdfToPDFA.tip=Saat ini tidak dapat digunakan untuk beberapa input sekaligus
 pdfToPDFA.outputFormat=Format keluaran

src/main/resources/messages_it_IT.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Modalità OCR
 ocr.selectText.11=Rimuovi immagini dopo la scansione (Rimuove TUTTE le immagini, utile solo come parte del processo di conversione)
 ocr.selectText.12=Modalità di rendering (avanzato)
 ocr.help=Per favore leggi la documentazione su come usare il programma per altri linguaggi e/o uso non in Docker
-ocr.credit=Questo servizio utilizza OCRmyPDF e Tesseract per l'OCR.
+ocr.credit=Questo servizio utilizza qpdf e Tesseract per l'OCR.
 ocr.submit=Scansiona testo nel PDF con OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Converti in PDF
 #compress
 compress.title=Comprimi
 compress.header=Comprimi PDF
-compress.credit=Questo servizio utilizza Ghostscript per la compressione/ottimizzazione dei PDF.
+compress.credit=Questo servizio utilizza qpdf per la compressione/ottimizzazione dei PDF.
 compress.selectText.1=Modalità manuale - Da 1 a 4
 compress.selectText.2=Livello di ottimizzazione:
 compress.selectText.3=4 (Terribile per le immagini di testo)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Cambia proprietà
 #pdfToPDFA
 pdfToPDFA.title=Da PDF a PDF/A
 pdfToPDFA.header=Da PDF a PDF/A
-pdfToPDFA.credit=Questo servizio utilizza Ghostscript per la conversione in PDF/A.
+pdfToPDFA.credit=Questo servizio utilizza qpdf per la conversione in PDF/A.
 pdfToPDFA.submit=Converti
 pdfToPDFA.tip=Attualmente non funziona per più input contemporaneamente
 pdfToPDFA.outputFormat=Formato di output

src/main/resources/messages_ja_JP.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCRモード
 ocr.selectText.11=OCR後に画像を削除する (すべての画像を削除します。変換ステップの一部である場合にのみ有効です)。
 ocr.selectText.12=レンダリングタイプ (高度)
 ocr.help=他の言語でこれを使用する方法やDocker以外で使用する方法についてはこのドキュメントをお読みください。
-ocr.credit=本サービスにはOCRにOCRmyPDFとTesseractを使用しています。
+ocr.credit=本サービスにはOCRにqpdfとTesseractを使用しています。
 ocr.submit=OCRでPDFを処理する
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=PDFを変換
 #compress
 compress.title=圧縮
 compress.header=PDFを圧縮
-compress.credit=本サービスはPDFの圧縮/最適化にGhostscriptを使用しています。
+compress.credit=本サービスはPDFの圧縮/最適化にqpdfを使用しています。
 compress.selectText.1=手動モード -  1 から 4
 compress.selectText.2=品質レベル:
 compress.selectText.3=4 (テキスト画像は最悪)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=変更
 #pdfToPDFA
 pdfToPDFA.title=PDFをPDF/Aに変換
 pdfToPDFA.header=PDFをPDF/Aに変換
-pdfToPDFA.credit=本サービスはPDF/Aの変換にghostscriptを使用しています。
+pdfToPDFA.credit=本サービスはPDF/Aの変換にqpdfを使用しています。
 pdfToPDFA.submit=変換
 pdfToPDFA.tip=現在、一度に複数の入力に対して機能しません
 pdfToPDFA.outputFormat=Output format

src/main/resources/messages_ko_KR.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR 모드
 ocr.selectText.11=OCR 후 이미지 제거(모든 이미지 제거, 변환 단계의 일부인 경우에만 유용)
 ocr.selectText.12=렌더 유형(고급)
 ocr.help=다른 언어 또는 Docker에 포함되지 않은 언어에 대해 사용하는 방법에 대해서는 이 문서를 참조합니다.
-ocr.credit=이 서비스는 OCR에 OCRmyPDF와 Tesseract를 사용합니다.
+ocr.credit=이 서비스는 OCR에 qpdf와 Tesseract를 사용합니다.
 ocr.submit=인식
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=PDF로 변환
 #compress
 compress.title=압축
 compress.header=PDF 압축
-compress.credit=이 서비스는 PDF 압축 및 최적화를 위해 Ghostscript를 사용합니다.
+compress.credit=이 서비스는 PDF 압축 및 최적화를 위해 qpdf를 사용합니다.
 compress.selectText.1=수동 모드 - 1에서 4
 compress.selectText.2=최적화 수준:
 compress.selectText.3=4 (텍스트 이미지에 적합하지 않음)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=변경
 #pdfToPDFA
 pdfToPDFA.title=PDF를 PDF/A로
 pdfToPDFA.header=PDF 문서를 PDF/A로 변환
-pdfToPDFA.credit=이 서비스는 PDF/A 변환을 위해 ghostscript 문서를 사용합니다.
+pdfToPDFA.credit=이 서비스는 PDF/A 변환을 위해 qpdf 문서를 사용합니다.
 pdfToPDFA.submit=변환
 pdfToPDFA.tip=현재 한 번에 여러 입력에 대해 작동하지 않습니다.
 pdfToPDFA.outputFormat=출력 형식

src/main/resources/messages_nl_NL.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR-modus
 ocr.selectText.11=Verwijder afbeeldingen na OCR (Verwijdert ALLE afbeeldingen, alleen nuttig als onderdeel van conversiestap)
 ocr.selectText.12=Weergave Type (Geavanceerd)
 ocr.help=Lees deze documentatie over hoe dit te gebruiken voor andere talen en/of gebruik buiten docker
-ocr.credit=Deze dienst maakt gebruik van OCRmyPDF en Tesseract voor OCR.
+ocr.credit=Deze dienst maakt gebruik van qpdf en Tesseract voor OCR.
 ocr.submit=Verwerk PDF met OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Omzetten naar PDF
 #compress
 compress.title=Comprimeren
 compress.header=PDF comprimeren
-compress.credit=Deze functie gebruikt Ghostscript voor PDF Compressie/Optimalisatie.
+compress.credit=Deze functie gebruikt qpdf voor PDF Compressie/Optimalisatie.
 compress.selectText.1=Handmatige modus - Van 1 tot 4
 compress.selectText.2=Optimalisatieniveau:
 compress.selectText.3=4 (Verschrikkelijk voor tekstafbeeldingen)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Wijzigen
 #pdfToPDFA
 pdfToPDFA.title=PDF naar PDF/A
 pdfToPDFA.header=PDF naar PDF/A
-pdfToPDFA.credit=Deze service gebruikt ghostscript voor PDF/A-conversie
+pdfToPDFA.credit=Deze service gebruikt qpdf voor PDF/A-conversie
 pdfToPDFA.submit=Converteren
 pdfToPDFA.tip=Werkt momenteel niet voor meerdere inputs tegelijkertijd.
 pdfToPDFA.outputFormat=Uitvoerindeling

src/main/resources/messages_no_NB.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR-modus
 ocr.selectText.11=Fjern bilder etter OCR (Fjerner ALLE bilder, kun nyttig hvis det er en del av konverteringsprosessen)
 ocr.selectText.12=Renderingstype (Avansert)
 ocr.help=Vennligst les denne dokumentasjonen for hvordan du bruker dette for andre språk og/eller bruk utenfor Docker.
-ocr.credit=Denne tjenesten bruker OCRmyPDF og Tesseract for OCR.
+ocr.credit=Denne tjenesten bruker qpdf og Tesseract for OCR.
 ocr.submit=Behandle PDF med OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Konverter til PDF
 #compress
 compress.title=Komprimer
 compress.header=Komprimer PDF
-compress.credit=Denne tjenesten bruker Ghostscript for PDF-komprimering/optimisering.
+compress.credit=Denne tjenesten bruker qpdf for PDF-komprimering/optimisering.
 compress.selectText.1=Manuell modus - Fra 1 til 4
 compress.selectText.2=Optimeringsnivå:
 compress.selectText.3=4 (Dårlig for tekstbilder)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Endre
 #pdfToPDFA
 pdfToPDFA.title=PDF til PDF/A
 pdfToPDFA.header=PDF til PDF/A
-pdfToPDFA.credit=Denne tjenesten bruker ghostscript for PDF/A-konvertering
+pdfToPDFA.credit=Denne tjenesten bruker qpdf for PDF/A-konvertering
 pdfToPDFA.submit=Konverter
 pdfToPDFA.tip=Fungere for øyeblikket ikke for flere innganger samtidig
 pdfToPDFA.outputFormat=Utdataformat

src/main/resources/messages_pl_PL.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Tryb OCR
 ocr.selectText.11=Usuń obrazy po OCR (usuwa wszystkie obrazy, przydatne tylko, jeśli jest częścią etapu konwersji)
 ocr.selectText.12=Typ renderowania (zaawansowany)
 ocr.help=Przeczytaj tę dokumentację, aby dowiedzieć się, jak używać tego w innych językach i/lub nie używać docker
-ocr.credit=Ta usługa używa OCRmyPDF i Tesseract do OCR.
+ocr.credit=Ta usługa używa qpdf i Tesseract do OCR.
 ocr.submit=Przetwarzaj PDF za pomocą OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Konwertuj na PDF
 #compress
 compress.title=Kompresuj
 compress.header=Kompresuj PDF
-compress.credit=Ta usługa używa Ghostscript do kompresji/optymalizacji PDF.
+compress.credit=Ta usługa używa qpdf do kompresji/optymalizacji PDF.
 compress.selectText.1=Tryb ręczny - Od 1 do 4
 compress.selectText.2=Poziom optymalizacji:
 compress.selectText.3=4 (Duże dla obrazów tekstowych)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Zmień
 #pdfToPDFA
 pdfToPDFA.title=PDF na PDF/A
 pdfToPDFA.header=PDF na PDF/A
-pdfToPDFA.credit=Ta usługa używa ghostscript do konwersji PDF/A
+pdfToPDFA.credit=Ta usługa używa qpdf do konwersji PDF/A
 pdfToPDFA.submit=Konwertuj
 pdfToPDFA.tip=Tylko jeden plik na raz
 pdfToPDFA.outputFormat=Format wyjściowy:

src/main/resources/messages_pt_BR.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Modo OCR
 ocr.selectText.11=Remover imagens após o OCR (remove TODAS as imagens, útil apenas como parte do processo de conversão)
 ocr.selectText.12=Tipo de Renderização (avançado)
 ocr.help=Por favor, leia a documentação sobre como usar isso para outros idiomas e/ou fora do ambiente Docker
-ocr.credit=Este serviço usa OCRmyPDF e Tesseract para OCR.
+ocr.credit=Este serviço usa qpdf e Tesseract para OCR.
 ocr.submit=Processar PDF com OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Converter para PDF
 #compress
 compress.title=Comprimir
 compress.header=Comprimir PDF
-compress.credit=Este serviço usa o Ghostscript para compressão/otimização de PDF.
+compress.credit=Este serviço usa o qpdf para compressão/otimização de PDF.
 compress.selectText.1=Modo Manual - De 1 a 4
 compress.selectText.2=Nível de Otimização:
 compress.selectText.3=4 (Pior para imagens de texto)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Alterar
 #pdfToPDFA
 pdfToPDFA.title=PDF para PDF/A
 pdfToPDFA.header=PDF para PDF/A
-pdfToPDFA.credit=Este serviço usa ghostscript para conversão de PDF/A
+pdfToPDFA.credit=Este serviço usa qpdf para conversão de PDF/A
 pdfToPDFA.submit=Converter
 pdfToPDFA.tip=Atualmente não funciona para múltiplas entradas ao mesmo tempo
 pdfToPDFA.outputFormat=Formato de saída

src/main/resources/messages_pt_PT.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Modo OCR
 ocr.selectText.11=Remover imagens após o OCR (remove TODAS as imagens, útil apenas como parte do processo de conversão)
 ocr.selectText.12=Tipo de renderização (avançado)
 ocr.help=Por favor, leia a documentação sobre como usar isso para outros idiomas e/ou fora do ambiente Docker
-ocr.credit=Este serviço usa OCRmyPDF e Tesseract para OCR.
+ocr.credit=Este serviço usa qpdf e Tesseract para OCR.
 ocr.submit=Processar PDF com OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Converter para PDF
 #compress
 compress.title=Comprimir
 compress.header=Comprimir PDF
-compress.credit=Este serviço usa o Ghostscript para compressão/otimização de PDF.
+compress.credit=Este serviço usa o qpdf para compressão/otimização de PDF.
 compress.selectText.1=Modo Manual - De 1 a 4
 compress.selectText.2=Nível de Otimização:
 compress.selectText.3=4 (Pior para imagens de texto)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Mudar
 #pdfToPDFA
 pdfToPDFA.title=PDF para PDF/A
 pdfToPDFA.header=PDF para PDF/A
-pdfToPDFA.credit=Este serviço usa ghostscript para Conversão de PDF/A
+pdfToPDFA.credit=Este serviço usa qpdf para Conversão de PDF/A
 pdfToPDFA.submit=Converter
 pdfToPDFA.tip=Actualmente não funciona para múltiplos inputs de uma só vez
 pdfToPDFA.outputFormat=Formato de saída

src/main/resources/messages_ro_RO.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Mod OCR
 ocr.selectText.11=Elimină imaginile după OCR (Elimină TOATE imaginile, util doar în etapa de conversie)
 ocr.selectText.12=Tip de redare (Avansat)
 ocr.help=Citiți documentația pentru a afla cum să utilizați acest serviciu pentru alte limbi și/sau în afara mediului Docker
-ocr.credit=Acest serviciu utilizează OCRmyPDF și Tesseract pentru OCR.
+ocr.credit=Acest serviciu utilizează qpdf și Tesseract pentru OCR.
 ocr.submit=Procesează PDF-ul cu OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Convertiți în PDF
 #compress
 compress.title=Comprimare
 compress.header=Comprimare PDF
-compress.credit=Acest serviciu utilizează OCRmyPDF pentru comprimarea/optimizarea PDF-urilor.
+compress.credit=Acest serviciu utilizează qpdf pentru comprimarea/optimizarea PDF-urilor.
 compress.selectText.1=Nivel de optimizare:
 compress.selectText.2=0 (Fără optimizare)
 compress.selectText.3=1 (Implicit, optimizare fără pierdere)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Schimbă
 #pdfToPDFA
 pdfToPDFA.title=PDF către PDF/A
 pdfToPDFA.header=PDF către PDF/A
-pdfToPDFA.credit=Acest serviciu utilizează ghostscript pentru conversia în PDF/A
+pdfToPDFA.credit=Acest serviciu utilizează qpdf pentru conversia în PDF/A
 pdfToPDFA.submit=Convertește
 pdfToPDFA.tip=În prezent nu funcționează pentru mai multe intrări simultan
 pdfToPDFA.outputFormat=Format de ieșire

src/main/resources/messages_ru_RU.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR режим
 ocr.selectText.11=Удалить изображения после OCR (удаляет ВСЕ изображения, полезно только в том случае, если они являются частью шага преобразования)
 ocr.selectText.12=Тип рендера (расширенный)
 ocr.help=Прочтите эту документацию о том, как использовать это для других языков и/или использовать не в докере.
-ocr.credit=Этот сервис использует OCRmyPDF и Tesseract для OCR.
+ocr.credit=Этот сервис использует qpdf и Tesseract для OCR.
 ocr.submit=Обработка PDF с OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Преобразовать в PDF
 #compress
 compress.title=Сжать
 compress.header=Сжать PDF
-compress.credit=Эта служба использует Ghostscript для сжатия/оптимизации PDF.
+compress.credit=Эта служба использует qpdf для сжатия/оптимизации PDF.
 compress.selectText.1=Ручной режим - от 1 до 4
 compress.selectText.2=Уровень оптимизации:
 compress.selectText.3=4 (Ужасно для текстовых изображений)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Изменить
 #pdfToPDFA
 pdfToPDFA.title=PDF в PDF/A
 pdfToPDFA.header=PDF в PDF/A
-pdfToPDFA.credit=Этот сервис использует ghostscript для преобразования PDF/A
+pdfToPDFA.credit=Этот сервис использует qpdf для преобразования PDF/A
 pdfToPDFA.submit=Конвертировать
 pdfToPDFA.tip=В настоящее время не поддерживается при нескольких входных данных одновременно
 pdfToPDFA.outputFormat=Формат вывода

src/main/resources/messages_sk_SK.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR režim
 ocr.selectText.11=Odstrániť obrázky po OCR (Odstráni VŠETKY obrázky, užitočné iba ak je súčasťou konverzného kroku)
 ocr.selectText.12=Typ vykreslenia (Pokročilé)
 ocr.help=Prosím, prečítajte si túto dokumentáciu o tom, ako používať OCR pre iné jazyky a/alebo použitie mimo docker
-ocr.credit=Táto služba používa OCRmyPDF a Tesseract pre OCR.
+ocr.credit=Táto služba používa qpdf a Tesseract pre OCR.
 ocr.submit=Spracovať PDF s OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Konvertovať do PDF
 #compress
 compress.title=Komprimovať
 compress.header=Komprimovať PDF
-compress.credit=Táto služba používa Ghostscript pre kompresiu/optimalizáciu PDF.
+compress.credit=Táto služba používa qpdf pre kompresiu/optimalizáciu PDF.
 compress.selectText.1=Manuálny režim - Od 1 do 4
 compress.selectText.2=Úroveň optimalizácie:
 compress.selectText.3=4 (Hrozné pre textové obrázky)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Zmeniť
 #pdfToPDFA
 pdfToPDFA.title=PDF na PDF/A
 pdfToPDFA.header=PDF na PDF/A
-pdfToPDFA.credit=Táto služba používa ghostscript na konverziu PDF/A
+pdfToPDFA.credit=Táto služba používa qpdf na konverziu PDF/A
 pdfToPDFA.submit=Konvertovať
 pdfToPDFA.tip=Momentálne nefunguje pre viacero vstupov naraz
 pdfToPDFA.outputFormat=Výstupný formát

src/main/resources/messages_sr_LATN_RS.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Režim OCR-a
 ocr.selectText.11=Ukloni slike nakon OCR-a (Uklanja SVE slike, korisno samo ako je deo koraka konverzije)
 ocr.selectText.12=Tip rendiranja (Napredno)
 ocr.help=Molimo vas da pročitate ovu dokumentaciju o tome kako koristiti ovo za druge jezike i/ili korišćenje van docker-a
-ocr.credit=Ova usluga koristi OCRmyPDF i Tesseract za OCR.
+ocr.credit=Ova usluga koristi qpdf i Tesseract za OCR.
 ocr.submit=Obradi PDF sa OCR-om
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Konvertuj u PDF
 #compress
 compress.title=Kompresija
 compress.header=Kompresuj PDF
-compress.credit=Ova usluga koristi Ghostscript za kompresiju / optimizaciju PDF-a.
+compress.credit=Ova usluga koristi qpdf za kompresiju / optimizaciju PDF-a.
 compress.selectText.1=Ručni režim - Od 1 do 4
 compress.selectText.2=Nivo optimizacije:
 compress.selectText.3=4 (Užasno za tekstualne slike)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Promeni
 #pdfToPDFA
 pdfToPDFA.title=PDF u PDF/A
 pdfToPDFA.header=PDF u PDF/A
-pdfToPDFA.credit=Ova usluga koristi ghostscript za konverziju u PDF/A format
+pdfToPDFA.credit=Ova usluga koristi qpdf za konverziju u PDF/A format
 pdfToPDFA.submit=Konvertuj
 pdfToPDFA.tip=Currently does not work for multiple inputs at once
 pdfToPDFA.outputFormat=Output format

src/main/resources/messages_sv_SE.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR-läge
 ocr.selectText.11=Ta bort bilder efter OCR (tar bort ALLA bilder, endast användbart som en del av konverteringssteget)
 ocr.selectText.12=Renderingstyp (avancerat)
 ocr.help=Vänligen läs denna dokumentation om hur du använder detta för andra språk och/eller använder inte i docker
-ocr.credit=Denna tjänst använder OCRmyPDF och Tesseract för OCR.
+ocr.credit=Denna tjänst använder qpdf och Tesseract för OCR.
 ocr.submit=Bearbeta PDF med OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Konvertera till PDF
 #compress
 compress.title=Komprimera
 compress.header=Komprimera PDF
-compress.credit=Denna tjänst använder Ghostscript för PDF-komprimering/optimering.
+compress.credit=Denna tjänst använder qpdf för PDF-komprimering/optimering.
 compress.selectText.1=Manuellt läge - Från 1 till 4
 compress.selectText.2=Optimeringsnivå:
 compress.selectText.3=4 (Fruktansvärt för textbilder)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Ändra
 #pdfToPDFA
 pdfToPDFA.title=PDF till PDF/A
 pdfToPDFA.header=PDF till PDF/A
-pdfToPDFA.credit=Denna tjänst använder ghostscript för PDF/A-konvertering
+pdfToPDFA.credit=Denna tjänst använder qpdf för PDF/A-konvertering
 pdfToPDFA.submit=Konvertera
 pdfToPDFA.tip=Fungerar för närvarande inte för flera inmatningar samtidigt
 pdfToPDFA.outputFormat=Utdataformat

src/main/resources/messages_th_TH.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=โหมด OCR
 ocr.selectText.11=ลบภาพหลังจาก OCR (ลบภาพทั้งหมด, มีประโยชน์เฉพาะหากเป็นส่วนหนึ่งของขั้นตอนการแปลง)
 ocr.selectText.12=ประเภทการเรนเดอร์ (ขั้นสูง)
 ocr.help=โปรดอ่านเอกสารนี้เพื่อใช้งานภาษาอื่นๆ และ/หรือใช้งานนอก docker
-ocr.credit=บริการนี้ใช้ OCRmyPDF และ Tesseract สำหรับ OCR
+ocr.credit=บริการนี้ใช้ qpdf และ Tesseract สำหรับ OCR
 ocr.submit=ประมวลผล PDF ด้วย OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=แปลงเป็น PDF
 #compress
 compress.title=บีบอัด
 compress.header=บีบอัด PDF
-compress.credit=บริการนี้ใช้ Ghostscript สำหรับการบีบอัด/การเพิ่มประสิทธิภาพ PDF
+compress.credit=บริการนี้ใช้ qpdf สำหรับการบีบอัด/การเพิ่มประสิทธิภาพ PDF
 compress.selectText.1=โหมดแมนนวล - จาก 1 ถึง 4
 compress.selectText.2=ระดับการเพิ่มประสิทธิภาพ:
 compress.selectText.3=4 (ไม่ดีสำหรับภาพข้อความ)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=เปลี่ยน
 #pdfToPDFA
 pdfToPDFA.title=PDF เป็น PDF/A
 pdfToPDFA.header=PDF เป็น PDF/A
-pdfToPDFA.credit=บริการนี้ใช้ ghostscript สำหรับการแปลง PDF/A
+pdfToPDFA.credit=บริการนี้ใช้ qpdf สำหรับการแปลง PDF/A
 pdfToPDFA.submit=แปลง
 pdfToPDFA.tip=ปัจจุบันไม่ทำงานสำหรับการป้อนข้อมูลหลายรายการพร้อมกัน
 pdfToPDFA.outputFormat=รูปแบบผลลัพธ์

src/main/resources/messages_tr_TR.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR Modu
 ocr.selectText.11=OCR'den sonra resimleri kaldır (TÜM resimleri kaldırır, sadece dönüşüm adımının bir parçasıysa yararlıdır)
 ocr.selectText.12=Render Türü (İleri Seviye)
 ocr.help=Lütfen bu belgede başka dillerde nasıl kullanılacağı ve/veya docker'da kullanılmaması hakkında bilgi edinin
-ocr.credit=Bu hizmet OCR için OCRmyPDF ve Tesseract'ı kullanır.
+ocr.credit=Bu hizmet OCR için qpdf ve Tesseract'ı kullanır.
 ocr.submit=PDF'i OCR(Metin Tanıma) ile İşle
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=PDF'e Dönüştür
 #compress
 compress.title=Sıkıştır
 compress.header=PDF'i Sıkıştır
-compress.credit=Bu hizmet PDF Sıkıştırma/Optimizasyonu için Ghostscript kullanır.
+compress.credit=Bu hizmet PDF Sıkıştırma/Optimizasyonu için qpdf kullanır.
 compress.selectText.1=Manuel Mod - 1'den 4'e
 compress.selectText.2=Optimizasyon seviyesi:
 compress.selectText.3=4 (Metin resimleri için hiç uygun değil)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Değiştir
 #pdfToPDFA
 pdfToPDFA.title=PDF'den PDF/A'ya
 pdfToPDFA.header=PDF'den PDF/A'ya
-pdfToPDFA.credit=Bu hizmet PDF/A dönüşümü için ghostscript kullanır
+pdfToPDFA.credit=Bu hizmet PDF/A dönüşümü için qpdf kullanır
 pdfToPDFA.submit=Dönüştür
 pdfToPDFA.tip=Şu anda aynı anda birden fazla giriş için çalışmıyor
 pdfToPDFA.outputFormat=Çıkış formatı

src/main/resources/messages_uk_UA.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Режим OCR
 ocr.selectText.11=Видалити зображення після OCR (видаляє ВСІ зображення, корисно лише в тому випадку, якщо вони є частиною етапу перетворення)
 ocr.selectText.12=Тип рендеру (розширений)
 ocr.help=Прочитайте цю документацію про те, як використовувати це для інших мов і/або використовувати не в докері.
-ocr.credit=Цей сервіс використовує OCRmyPDF та Tesseract для OCR.
+ocr.credit=Цей сервіс використовує qpdf та Tesseract для OCR.
 ocr.submit=Обробка PDF з OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Перетворити у PDF
 #compress
 compress.title=Стиснути
 compress.header=Стиснути PDF
-compress.credit=Ця служба використовує Ghostscript для стиснення/оптимізації PDF.
+compress.credit=Ця служба використовує qpdf для стиснення/оптимізації PDF.
 compress.selectText.1=Ручний режим - від 1 до 4
 compress.selectText.2=Рівень оптимізації:
 compress.selectText.3=4 (Жахливо для текстових зображень)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Змінити
 #pdfToPDFA
 pdfToPDFA.title=PDF в PDF/A
 pdfToPDFA.header=PDF в PDF/A
-pdfToPDFA.credit=Цей сервіс використовує ghostscript для перетворення у формат PDF/A
+pdfToPDFA.credit=Цей сервіс використовує qpdf для перетворення у формат PDF/A
 pdfToPDFA.submit=Конвертувати
 pdfToPDFA.tip=Наразі не працює для кількох вхідних файлів одночасно
 pdfToPDFA.outputFormat=Вихідний формат

src/main/resources/messages_vi_VN.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=Chế độ OCR
 ocr.selectText.11=Xóa hình ảnh sau khi OCR (Xóa TẤT CẢ hình ảnh, chỉ hữu ích nếu là một phần của bước chuyển đổi)
 ocr.selectText.12=Loại hiển thị (Nâng cao)
 ocr.help=Vui lòng đọc tài liệu này về cách sử dụng cho các ngôn ngữ khác và/hoặc sử dụng không trong docker
-ocr.credit=Dịch vụ này sử dụng OCRmyPDF và Tesseract cho OCR.
+ocr.credit=Dịch vụ này sử dụng qpdf và Tesseract cho OCR.
 ocr.submit=Xử lý PDF với OCR
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=Chuyển đổi sang PDF
 #compress
 compress.title=Nén
 compress.header=Nén PDF
-compress.credit=Dịch vụ này sử dụng Ghostscript để Nén/Tối ưu hóa PDF.
+compress.credit=Dịch vụ này sử dụng qpdf để Nén/Tối ưu hóa PDF.
 compress.selectText.1=Chế độ thủ công - Từ 1 đến 4
 compress.selectText.2=Mức độ tối ưu hóa:
 compress.selectText.3=4 (Tệ cho hình ảnh văn bản)
@@ -1112,7 +1112,7 @@ changeMetadata.submit=Thay đổi
 #pdfToPDFA
 pdfToPDFA.title=PDF sang PDF/A
 pdfToPDFA.header=PDF sang PDF/A
-pdfToPDFA.credit=Dịch vụ này sử dụng ghostscript để chuyển đổi PDF/A
+pdfToPDFA.credit=Dịch vụ này sử dụng qpdf để chuyển đổi PDF/A
 pdfToPDFA.submit=Chuyển đổi
 pdfToPDFA.tip=Hiện tại không hoạt động với nhiều đầu vào cùng lúc
 pdfToPDFA.outputFormat=Định dạng đầu ra

src/main/resources/messages_zh_CN.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR模式
 ocr.selectText.11=OCR后移除图像（移除所有图像，只有在转换步骤中才有用）。
 ocr.selectText.12=渲染类型（高级）
 ocr.help=请阅读此文档，了解如何将其用于其他语言和/或不在docker中使用。
-ocr.credit=此服务使用OCRmyPDF和Tesseract进行OCR。
+ocr.credit=此服务使用qpdf和Tesseract进行OCR。
 ocr.submit=用OCR处理PDF
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=转换为 PDF
 #compress
 compress.title=压缩
 compress.header=压缩PDF
-compress.credit=此服务使用Ghostscript进行PDF压缩/优化。
+compress.credit=此服务使用qpdf进行PDF压缩/优化。
 compress.selectText.1=手动模式 - 从 1 到 4
 compress.selectText.2=优化级别：
 compress.selectText.3=4（文本图像很糟糕）
@@ -1112,7 +1112,7 @@ changeMetadata.submit=更改
 #pdfToPDFA
 pdfToPDFA.title=PDF转PDF/A
 pdfToPDFA.header=将PDF转换为PDF/A
-pdfToPDFA.credit=此服务使用ghostscript进行PDF/A转换
+pdfToPDFA.credit=此服务使用qpdf进行PDF/A转换
 pdfToPDFA.submit=转换
 pdfToPDFA.tip=目前不支持上传多个
 pdfToPDFA.outputFormat=输出格式

src/main/resources/messages_zh_TW.properties

@@ -868,7 +868,7 @@ ocr.selectText.10=OCR 模式
 ocr.selectText.11=移除 OCR 後的影像（移除所有影像，只有在轉換步驟中才有用）
 ocr.selectText.12=渲染類型（進階）
 ocr.help=請閱讀此文件，了解如何使用其他語言和/或在 Docker 中使用
-ocr.credit=此服務使用 OCRmyPDF 和 Tesseract 進行 OCR。
+ocr.credit=此服務使用 qpdf 和 Tesseract 進行 OCR。
 ocr.submit=使用 OCR 處理 PDF
 
 
@@ -892,7 +892,7 @@ fileToPDF.submit=轉換為 PDF
 #compress
 compress.title=壓縮
 compress.header=壓縮 PDF
-compress.credit=此服務使用 Ghostscript 進行 PDF 壓縮/最佳化。
+compress.credit=此服務使用 qpdf 進行 PDF 壓縮/最佳化。
 compress.selectText.1=手動模式 - 從 1 到 4
 compress.selectText.2=最佳化等級：
 compress.selectText.3=4（對於含有文字的影像來說結果很糟）
@@ -1112,7 +1112,7 @@ changeMetadata.submit=變更
 #pdfToPDFA
 pdfToPDFA.title=PDF 轉 PDF/A
 pdfToPDFA.header=PDF 轉 PDF/A
-pdfToPDFA.credit=此服務使用 ghostscript 進行 PDF/A 轉換
+pdfToPDFA.credit=此服務使用 qpdf 進行 PDF/A 轉換
 pdfToPDFA.submit=轉換
 pdfToPDFA.tip=目前不支援上傳多個
 pdfToPDFA.outputFormat=輸出格式

src/main/resources/settings.yml.template

@@ -107,9 +107,9 @@ processExecutor:
   sessionLimit:    # Process executor instances limits
     libreOfficeSessionLimit: 1
     pdfToHtmlSessionLimit: 1
-    ocrMyPdfSessionLimit: 2
+    qpdfSessionLimit: 4
+    tesseractSessionLimit: 1
     pythonOpenCvSessionLimit: 8
-    ghostScriptSessionLimit: 16
     weasyPrintSessionLimit: 16
     installAppSessionLimit: 1
     calibreSessionLimit: 1
@@ -117,7 +117,7 @@ processExecutor:
     libreOfficetimeoutMinutes: 30
     pdfToHtmltimeoutMinutes: 20
     pythonOpenCvtimeoutMinutes: 30
-    ghostScripttimeoutMinutes: 30
     weasyPrinttimeoutMinutes: 30
     installApptimeoutMinutes: 60
     calibretimeoutMinutes: 30
+    tesseractTimeoutMinutes: 30

src/main/resources/templates/fragments/footer.html

@@ -4,6 +4,7 @@
     <div class="d-flex justify-content-center">
       <ul class="list-unstyled d-flex">
         <li><a class="footer-link px-2" id="licenses" target="_blank" th:href="@{'/licenses'}" th:text="#{licenses.nav}">Licenses</a></li>
+        <li><a class="footer-link px-2" id="licenses" target="_blank" th:href="@{'/releases'}" th:text="#{releases.footer}">Releases</a></li>
         <li><a class="footer-link px-2" id="survey" target="_blank" href="https://stirlingpdf.info/s/cm28y3niq000o56dv7liv8wsu" th:text="#{survey.nav}">Survey</a></li>
         <li th:if="${@privacyPolicy != ''}"><a class="footer-link px-2" target="_blank" th:href="${@privacyPolicy}" th:text="#{legal.privacy}">privacyPolicy</a></li>
         <li th:if="${@termsAndConditions != ''}"><a class="footer-link px-2" target="_blank" th:href="${@termsAndConditions}" th:text="#{legal.terms}">termsAndConditions</a></li>

src/main/resources/templates/misc/compress-pdf.html

@@ -29,9 +29,14 @@
                   <label for="optimizeLevel" th:text="#{compress.selectText.2}"></label>
                   <select name="optimizeLevel" id="optimizeLevel" class="form-control">
                     <option value="1">1</option>
-                    <option value="2" selected>2</option>
+                    <option value="2">2</option>
                     <option value="3">3</option>
-                    <option value="4" th:text="#{compress.selectText.3}"></option>
+                    <option value="4">4</option>
+                    <option value="5" selected>5</option>
+                    <option value="6">6</option>
+                    <option value="7">7</option>
+                    <option value="8">8</option>
+                    <option value="9">9</option>
                   </select>
                 </div>
               </div>

src/main/resources/templates/misc/ocr-pdf.html

@@ -62,26 +62,6 @@
                 </div>
                 <br>
                 <label for="languages" class="form-label" th:text="#{ocr.selectText.9}"></label>
-                <div class="form-check ms-3">
-                  <input type="checkbox" name="sidecar" id="sidecar" />
-                  <label for="sidecar" th:text="#{ocr.selectText.2}"></label>
-                </div>
-                <div class="form-check ms-3">
-                  <input type="checkbox" name="deskew" id="deskew" />
-                  <label for="deskew" th:text="#{ocr.selectText.3}"></label>
-                </div>
-                <div class="form-check ms-3">
-                  <input type="checkbox" name="clean" id="clean" />
-                  <label for="clean" th:text="#{ocr.selectText.4}"></label>
-                </div>
-                <div class="form-check ms-3">
-                  <input type="checkbox" name="clean-final" id="clean-final" />
-                  <label for="clean-final" th:text="#{ocr.selectText.5}"></label>
-                </div>
-                <div class="form-check ms-3">
-                  <input type="checkbox" name="removeImagesAfter" id="removeImagesAfter" />
-                  <label for="removeImagesAfter" th:text="#{ocr.selectText.11}"></label>
-                </div>
                 <div class="mb-3">
                   <label th:text="#{ocr.selectText.12}"></label>
                   <select class="form-control" name="ocrRenderType">
@@ -239,7 +219,6 @@
                   });
                 });
               </script>
-              <p th:text="#{ocr.credit}"></p>
               <p th:text="#{ocr.help}"></p>
               <a href="https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToUseOCR.md">https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToUseOCR.md</a>
             </div>

src/main/resources/templates/releases.html

@@ -0,0 +1,473 @@
+<!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=#{releases.title}, header=#{releases.title})}"></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-8 bg-card">
+                    <div class="tool-header">
+                        <span class="material-symbols-rounded tool-header-icon history">update</span>
+                        <span class="tool-header-text" th:text="#{releases.header}">Release Notes</span>
+                    </div>
+                    
+                    <div class="alert alert-info" role="alert">
+                        <strong th:text="#{releases.current.version}">Current Installed Version</strong>: 
+                        <span id="currentVersion" th:text="${@appVersion}"></span>
+                    </div>
+
+					<div class="alert alert-warning" role="alert">
+					    <span th:text="#{releases.note}">All release notes are only available in English</span>
+					</div>
+
+                    <div id="loading" class="text-center my-4">
+                        <div class="spinner-border text-primary" role="status">
+                            <span class="visually-hidden">Loading...</span>
+                        </div>
+                    </div>
+
+                    <div id="error-message" class="alert alert-danger d-none" role="alert">
+                        Failed to load release notes. Please try again later.
+                    </div>
+
+                    <!-- Release Notes Container -->
+                    <div id="release-notes-container" class="release-notes-container">
+                        <!-- Release notes will be dynamically inserted here -->
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+    <th:block th:insert="~{fragments/footer.html :: footer}"></th:block>
+</div>
+
+<style>
+    .release-notes-container {
+        margin-top: 2rem;
+    }
+    
+    .release-card {
+        border: 1px solid #dee2e6;
+        border-radius: 0.25rem;
+        margin-bottom: 1.5rem;
+        padding: 1rem;
+    }
+    
+    .release-card.current-version {
+        border-color: #28a745;
+        background-color: rgba(40, 167, 69, 0.05);
+    }
+    
+    .release-header {
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+        margin-bottom: 1rem;
+    }
+    
+    .release-header h3 {
+        margin: 0;
+        display: flex;
+        gap: 1rem;
+        align-items: center;
+    }
+    
+    .version {
+        font-weight: bold;
+    }
+    
+    .release-date {
+        color: #6c757d;
+        font-size: 0.9em;
+    }
+    
+    .release-body {
+        font-size: 0.9rem;
+        white-space: pre-wrap;
+        word-break: break-word;
+    }
+
+    .release-link {
+        color: #0d6efd;
+        text-decoration: none;
+    }
+
+    .release-link:hover {
+        text-decoration: underline;
+    }
+</style>
+
+<script th:inline="javascript">
+    /*<![CDATA[*/
+    
+    // Get the current version from the appVersion bean
+    const appVersion = [[${@appVersion}]];
+    
+    // GitHub API configuration
+    const REPO_OWNER = 'Stirling-Tools';
+    const REPO_NAME = 'Stirling-PDF';
+    const GITHUB_API = 'https://api.github.com/repos/' + REPO_OWNER + '/' + REPO_NAME;
+	const GITHUB_URL = 'https://github.com/' + REPO_OWNER + '/' + REPO_NAME;
+	const MAX_RELEASES = 8;
+	
+    // Secure element creation helper
+    function createElement(tag, attributes = {}, children = []) {
+        const element = document.createElement(tag);
+        Object.entries(attributes).forEach(([key, value]) => {
+            if (typeof value === 'string') {
+                element.setAttribute(key, value);
+            }
+        });
+        children.forEach(child => {
+            if (typeof child === 'string') {
+                element.appendChild(document.createTextNode(child));
+            } else if (child instanceof Node) {
+                element.appendChild(child);
+            }
+        });
+        return element;
+    }
+
+	
+    const ALLOWED_TAGS = {
+        'a': ['href', 'target', 'rel', 'class'],
+        'img': ['src', 'alt', 'width', 'height', 'style'],
+        'br': [],
+        'p': [],
+        'div': [],
+        'span': []
+    };
+
+    // Function to safely create HTML elements from string
+    function createSafeElement(htmlString) {
+        try {
+            const parser = new DOMParser();
+            const doc = parser.parseFromString(htmlString, 'text/html');
+            
+            function sanitizeNode(node) {
+                // Safety check for null/undefined
+                if (!node) return null;
+
+                // Handle text nodes
+                if (node.nodeType === Node.TEXT_NODE) {
+                    return node.cloneNode(true);
+                }
+
+                // Handle element nodes
+                if (node.nodeType === Node.ELEMENT_NODE) {
+                    const tagName = node.tagName.toLowerCase();
+                    
+                    // Check if tag is allowed
+                    if (!ALLOWED_TAGS[tagName]) {
+                        return document.createTextNode(node.textContent);
+                    }
+
+                    // Create new element
+                    const cleanElement = document.createElement(tagName);
+                    
+                    // Copy allowed attributes
+                    const allowedAttributes = ALLOWED_TAGS[tagName];
+                    Array.from(node.attributes).forEach(attr => {
+                        if (allowedAttributes.includes(attr.name)) {
+                            let value = attr.value;
+                            if (attr.name === 'href' || attr.name === 'src') {
+                                try {
+                                    value = encodeURI(value);
+                                } catch {
+                                    return;
+                                }
+                            }
+                            cleanElement.setAttribute(attr.name, value);
+                        }
+                    });
+
+                    // Add security attributes for links
+                    if (tagName === 'a') {
+                        cleanElement.setAttribute('rel', 'noopener noreferrer');
+                    }
+
+                    // Process children
+                    Array.from(node.childNodes).forEach(child => {
+                        const cleanChild = sanitizeNode(child);
+                        if (cleanChild) {
+                            cleanElement.appendChild(cleanChild);
+                        }
+                    });
+
+                    return cleanElement;
+                }
+
+                // If not text or element node, return null
+                return null;
+            }
+
+            // Get the actual content from the body
+            const content = doc.body.children;
+            if (!content || content.length === 0) {
+                return null;
+            }
+
+            // If it's a single element, process it directly
+            if (content.length === 1) {
+                return sanitizeNode(content[0]);
+            }
+
+            // If multiple elements, wrap them in a div
+            const wrapper = document.createElement('div');
+            Array.from(content).forEach(node => {
+                const cleanNode = sanitizeNode(node);
+                if (cleanNode) {
+                    wrapper.appendChild(cleanNode);
+                }
+            });
+
+            return wrapper;
+        } catch (error) {
+            console.error('Error parsing HTML:', error);
+            return null;
+        }
+    }
+
+    function processGitHubReferences(text) {
+    if (!text || typeof text !== 'string') {
+        return text;
+    }
+
+    let currentText = text;
+    let match;
+    let lastIndex = 0;
+    const result = document.createElement('span');
+    const urlRegex = new RegExp('https://github\\.com/' + REPO_OWNER + '/' + REPO_NAME + '/(?:issues|pull)/(\\d+)', 'g');
+    
+    while ((match = urlRegex.exec(text)) !== null) {
+        // Add text before the match
+        if (match.index > lastIndex) {
+            result.appendChild(document.createTextNode(text.substring(lastIndex, match.index)));
+        }
+
+        // Create link element
+        const link = document.createElement('a');
+        link.href = encodeURI(match[0]);
+        link.textContent = `#${match[1]}`; // Use issue/PR number
+        link.className = 'release-link';
+        link.target = '_blank';
+        link.rel = 'noopener noreferrer';
+        result.appendChild(link);
+        
+        lastIndex = match.index + match[0].length;
+    }
+
+    // Add remaining text after last match
+    if (lastIndex < text.length) {
+        result.appendChild(document.createTextNode(text.substring(lastIndex)));
+    }
+
+    return result;
+}
+
+// Update formatText function to handle processGitHubReferences properly
+function formatText(text) {
+    const container = document.createElement('div');
+    
+    // Split the text into lines
+    const lines = text.split('\n');
+    let currentList = null;
+    
+    lines.forEach(line => {
+        const trimmedLine = line.trim();
+        
+        // Skip empty lines but add spacing
+        if (!trimmedLine) {
+            if (currentList) {
+                container.appendChild(currentList);
+                currentList = null;
+            }
+            container.appendChild(document.createElement('br'));
+            return;
+        }
+        
+        // Check if the line is HTML
+        if (trimmedLine.startsWith('<') && trimmedLine.endsWith('>')) {
+            if (currentList) {
+                container.appendChild(currentList);
+                currentList = null;
+            }
+            
+            const safeElement = createSafeElement(trimmedLine);
+            if (safeElement) {
+                container.appendChild(safeElement);
+            } else {
+                // If HTML parsing fails, treat as plain text
+                container.appendChild(document.createTextNode(trimmedLine));
+            }
+            return;
+        }
+        
+        // Check for headers
+        const headerMatch = trimmedLine.match(/^(#{1,3})\s+(.+)$/);
+        if (headerMatch) {
+            if (currentList) {
+                container.appendChild(currentList);
+                currentList = null;
+            }
+            const headerLevel = headerMatch[1].length;
+            const headerContent = headerMatch[2];
+            // Process GitHub references in headers
+            const processedContent = processGitHubReferences(headerContent);
+            const header = createElement(`h${headerLevel}`);
+            header.appendChild(processedContent);
+            container.appendChild(header);
+            return;
+        }
+        
+        // Check for bullet points
+        const bulletMatch = trimmedLine.match(/^[-*]\s+(.+)$/);
+        if (bulletMatch) {
+            if (!currentList) {
+                currentList = document.createElement('ul');
+            }
+            
+            const listContent = bulletMatch[1];
+            const listItem = document.createElement('li');
+            
+            // Process GitHub references in list items
+            listItem.appendChild(processGitHubReferences(listContent));
+            currentList.appendChild(listItem);
+            return;
+        }
+        
+        // If we reach here and have a list, append it
+        if (currentList) {
+            container.appendChild(currentList);
+            currentList = null;
+        }
+        
+        // Handle regular paragraph
+        const paragraph = document.createElement('p');
+        paragraph.appendChild(processGitHubReferences(trimmedLine));
+        container.appendChild(paragraph);
+    });
+    
+    // Append any remaining list
+    if (currentList) {
+        container.appendChild(currentList);
+    }
+    
+    return container;
+}
+
+    const MAX_PREVIOUS_RELEASES = 5;
+function compareVersions(v1, v2) {
+    const normalize = v => v.replace(/^v/, '');
+    const v1Parts = normalize(v1).split('.').map(Number);
+    const v2Parts = normalize(v2).split('.').map(Number);
+    
+    for (let i = 0; i < Math.max(v1Parts.length, v2Parts.length); i++) {
+        const v1Part = v1Parts[i] || 0;
+        const v2Part = v2Parts[i] || 0;
+        if (v1Part > v2Part) return 1;
+        if (v1Part < v2Part) return -1;
+    }
+    return 0;
+}
+
+async function loadReleases() {
+    const container = document.getElementById('release-notes-container');
+    const loading = document.getElementById('loading');
+    const errorMessage = document.getElementById('error-message');
+
+    try {
+        loading.classList.remove('d-none');
+        errorMessage.classList.add('d-none');
+        
+        // Clear container safely
+        while (container.firstChild) {
+            container.removeChild(container.firstChild);
+        }
+
+        const response = await fetch(GITHUB_API + '/releases');
+        if (!response.ok) throw new Error('Failed to fetch releases');
+        const releases = await response.json();
+
+        // Sort releases by version number (descending)
+        releases.sort((a, b) => compareVersions(b.tag_name, a.tag_name));
+
+        // Find index of current version
+        const currentVersionIndex = releases.findIndex(release => 
+            compareVersions(release.tag_name, 'v' + appVersion) === 0 || 
+            compareVersions(release.tag_name, appVersion) === 0
+        );
+
+        if (currentVersionIndex === -1) {
+            container.appendChild(createElement('div', {
+                class: 'alert alert-warning'
+            }, ['Current version not found in releases.']));
+            return;
+        }
+
+        // Get current version and 8 previous releases
+        const endIndex = Math.min(currentVersionIndex + MAX_PREVIOUS_RELEASES + 1, releases.length);
+        const relevantReleases = releases.slice(currentVersionIndex, endIndex);
+
+        if (relevantReleases.length === 0) {
+            container.appendChild(createElement('div', {
+                class: 'alert alert-warning'
+            }, ['No releases found.']));
+            return;
+        }
+
+        relevantReleases.forEach((release, index) => {
+            const isCurrentVersion = index === 0; // First release in the array is current version
+            
+            const releaseCard = createElement('div', {
+                class: `release-card ${isCurrentVersion ? 'current-version' : ''}`
+            });
+
+            const header = createElement('div', { class: 'release-header' });
+            
+            const h3 = createElement('h3', {}, [
+                createElement('span', { class: 'version' }, [release.tag_name]),
+                createElement('span', { class: 'release-date' }, [
+                    new Date(release.created_at).toLocaleDateString()
+                ])
+            ]);
+            
+            header.appendChild(h3);
+
+            if (isCurrentVersion) {
+                header.appendChild(createElement('span', {
+                    class: 'badge bg-success'
+                }, ['Installed']));
+            }
+
+            releaseCard.appendChild(header);
+
+            const body = createElement('div', { class: 'release-body' });
+            body.appendChild(formatText(release.body || 'No release notes available.'));
+            
+            releaseCard.appendChild(body);
+            container.appendChild(releaseCard);
+        });
+
+    } catch (error) {
+        console.error('Error loading releases:', error);
+        errorMessage.classList.remove('d-none');
+    } finally {
+        loading.classList.add('d-none');
+    }
+}
+
+
+    // Load releases when the page loads
+    document.addEventListener('DOMContentLoaded', loadReleases);
+    
+    /*]]>*/
+</script>
+</body>
+</html>