Compression fixes (#3081)

# Description of Changes Please provide a summary of the changes, including: - What was changed - Why the change was made - Any challenges encountered Closes #(issue_number) --- ## Checklist ### General - [ ] I have read the [Contribution Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md) - [ ] I have read the [Stirling-PDF Developer Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md) (if applicable) - [ ] I have read the [How to add new languages to Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md) (if applicable) - [ ] I have performed a self-review of my own code - [ ] My changes generate no new warnings ### Documentation - [ ] I have updated relevant docs on [Stirling-PDF's doc repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/) (if functionality has heavily changed) - [ ] I have read the section [Add New Translation Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags) (for new translation tags only) ### UI Changes (if applicable) - [ ] Screenshots or videos demonstrating the UI changes are attached (e.g., as comments or direct attachments in the PR) ### Testing (if applicable) - [ ] I have tested my changes locally. Refer to the [Testing Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing) for more details.
2025-03-02 00:16:47 +01:00 · 2025-02-28 20:43:35 +00:00 · 2025-02-28 20:43:35 +00:00 · 3cfcfb2d4e
commit 3cfcfb2d4e
parent 50dcc6178c
43 changed files with 485 additions and 224 deletions
--- a/src/main/java/stirling/software/SPDF/controller/api/misc/CompressController.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/misc/CompressController.java
@ -5,11 +5,18 @@ import java.awt.image.BufferedImage;
 import java.io.ByteArrayOutputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.StandardCopyOption;
 import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Iterator;
 import java.util.List;
+import java.util.Set;

+import javax.imageio.IIOImage;
 import javax.imageio.ImageIO;
+import javax.imageio.ImageWriteParam;
+import javax.imageio.ImageWriter;
+import javax.imageio.plugins.jpeg.JPEGImageWriteParam;
+import javax.imageio.stream.ImageOutputStream;

 import org.apache.pdfbox.Loader;
 import org.apache.pdfbox.cos.COSName;
@ -52,74 +59,328 @@ public class CompressController {
        this.pdfDocumentFactory = pdfDocumentFactory;
    }

-    private void compressImagesInPDF(Path pdfFile, double initialScaleFactor, boolean grayScale)
-            throws Exception {
+    private void compressImagesInPDF(Path pdfFile, double scaleFactor, float jpegQuality) throws Exception {
        byte[] fileBytes = Files.readAllBytes(pdfFile);
+        long originalFileSize = fileBytes.length;
+        log.info(
+                "Starting image compression with scale factor: {} and JPEG quality: {} on file size: {}",
+                scaleFactor,
+                jpegQuality,
+                GeneralUtils.formatBytes(originalFileSize));
+
+        // Track processed images to avoid recompression
+        Set<String> processedImages = new HashSet<>();
+
        try (PDDocument doc = Loader.loadPDF(fileBytes)) {
-            double scaleFactor = initialScaleFactor;
+            int totalImages = 0;
+            int compressedImages = 0;
+            int skippedImages = 0;
+            long totalOriginalBytes = 0;
+            long totalCompressedBytes = 0;

-            for (PDPage page : doc.getPages()) {
+            // Minimum dimensions to preserve reasonable quality
+            int MIN_WIDTH = 400; // Higher minimum
+            int MIN_HEIGHT = 400; // Higher minimum
+
+            log.info("PDF has {} pages", doc.getNumberOfPages());
+
+            for (int pageNum = 0; pageNum < doc.getNumberOfPages(); pageNum++) {
+                PDPage page = doc.getPage(pageNum);
                PDResources res = page.getResources();
-                if (res != null && res.getXObjectNames() != null) {
-                    for (COSName name : res.getXObjectNames()) {
-                        PDXObject xobj = res.getXObject(name);
-                        if (xobj instanceof PDImageXObject image) {
-                            BufferedImage bufferedImage = image.getImage();

-                            int newWidth = (int) (bufferedImage.getWidth() * scaleFactor);
-                            int newHeight = (int) (bufferedImage.getHeight() * scaleFactor);
-
-                            if (newWidth == 0 || newHeight == 0) {
+                if (res == null || res.getXObjectNames() == null) {
                    continue;
                }

-                            Image scaledImage =
-                                    bufferedImage.getScaledInstance(
-                                            newWidth, newHeight, Image.SCALE_SMOOTH);
+                int pageImages = 0;

-                            BufferedImage scaledBufferedImage;
-                            if (grayScale
-                                    || bufferedImage.getType() == BufferedImage.TYPE_BYTE_GRAY) {
-                                scaledBufferedImage =
-                                        new BufferedImage(
-                                                newWidth, newHeight, BufferedImage.TYPE_BYTE_GRAY);
-                                scaledBufferedImage
-                                        .getGraphics()
-                                        .drawImage(scaledImage, 0, 0, null);
-                            } else {
-                                scaledBufferedImage =
-                                        new BufferedImage(
-                                                newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
-                                scaledBufferedImage
-                                        .getGraphics()
-                                        .drawImage(scaledImage, 0, 0, null);
+                for (COSName name : res.getXObjectNames()) {
+                    String imageName = name.getName();
+
+                    // Skip already processed images
+                    if (processedImages.contains(imageName)) {
+                        skippedImages++;
+                        continue;
+                    }
+
+                    PDXObject xobj = res.getXObject(name);
+                    if (!(xobj instanceof PDImageXObject)) {
+                        continue;
+                    }
+
+                    totalImages++;
+                    pageImages++;
+                    PDImageXObject image = (PDImageXObject) xobj;
+                    BufferedImage bufferedImage = image.getImage();
+
+                    int originalWidth = bufferedImage.getWidth();
+                    int originalHeight = bufferedImage.getHeight();
+
+                    log.info(
+                            "Page {}, Image {}: Original dimensions: {}x{}",
+                            pageNum + 1,
+                            imageName,
+                            originalWidth,
+                            originalHeight);
+
+                    // Skip if already small enough
+                    if (originalWidth <= MIN_WIDTH || originalHeight <= MIN_HEIGHT) {
+                        log.info(
+                                "Page {}, Image {}: Skipping - below minimum dimensions threshold",
+                                pageNum + 1,
+                                imageName);
+                        skippedImages++;
+                        processedImages.add(imageName);
+                        continue;
+                    }
+
+                    // Adjust scale factor for very large or very small images
+                    double adjustedScaleFactor = scaleFactor;
+                    if (originalWidth > 3000 || originalHeight > 3000) {
+                        // More aggressive for very large images
+                        adjustedScaleFactor = Math.min(scaleFactor, 0.75);
+                        log.info(
+                                "Page {}, Image {}: Very large image, using more aggressive scale: {}",
+                                pageNum + 1,
+                                imageName,
+                                adjustedScaleFactor);
+                    } else if (originalWidth < 1000 || originalHeight < 1000) {
+                        // More conservative for smaller images
+                        adjustedScaleFactor = Math.max(scaleFactor, 0.9);
+                        log.info(
+                                "Page {}, Image {}: Smaller image, using conservative scale: {}",
+                                pageNum + 1,
+                                imageName,
+                                adjustedScaleFactor);
+                    }
+
+                    int newWidth = (int) (originalWidth * adjustedScaleFactor);
+                    int newHeight = (int) (originalHeight * adjustedScaleFactor);
+
+                    // Ensure minimum dimensions
+                    newWidth = Math.max(newWidth, MIN_WIDTH);
+                    newHeight = Math.max(newHeight, MIN_HEIGHT);
+
+                    // Skip if change is negligible
+                    if ((double) newWidth / originalWidth > 0.95
+                            && (double) newHeight / originalHeight > 0.95) {
+                        log.info(
+                                "Page {}, Image {}: Change too small, skipping compression",
+                                pageNum + 1,
+                                imageName);
+                        skippedImages++;
+                        processedImages.add(imageName);
+                        continue;
+                    }
+
+                    log.info(
+                            "Page {}, Image {}: Resizing to {}x{} ({}% of original)",
+                            pageNum + 1,
+                            imageName,
+                            newWidth,
+                            newHeight,
+                            Math.round((newWidth * 100.0) / originalWidth));
+
+                    // Use high quality scaling
+                    BufferedImage scaledImage =
+                            new BufferedImage(
+                                    newWidth,
+                                    newHeight,
+                                    bufferedImage.getColorModel().hasAlpha()
+                                            ? BufferedImage.TYPE_INT_ARGB
+                                            : BufferedImage.TYPE_INT_RGB);
+
+                    Graphics2D g2d = scaledImage.createGraphics();
+                    g2d.setRenderingHint(
+                            RenderingHints.KEY_INTERPOLATION,
+                            RenderingHints.VALUE_INTERPOLATION_BICUBIC);
+                    g2d.setRenderingHint(
+                            RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
+                    g2d.setRenderingHint(
+                            RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+                    g2d.drawImage(bufferedImage, 0, 0, newWidth, newHeight, null);
+                    g2d.dispose();
+
+                    // Choose appropriate format and compression
+                    String format = bufferedImage.getColorModel().hasAlpha() ? "png" : "jpeg";
+                    
+                    // First get the actual size of the original image by encoding it to the chosen format
+                    ByteArrayOutputStream originalImageStream = new ByteArrayOutputStream();
+                    if (format.equals("jpeg")) {
+                        // Get the best available JPEG writer (prioritizes TwelveMonkeys if available)
+                        Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpeg");
+                        ImageWriter writer = null;
+
+                        // Prefer TwelveMonkeys writer if available
+                        while (writers.hasNext()) {
+                            ImageWriter candidate = writers.next();
+                            if (candidate.getClass().getName().contains("twelvemonkeys")) {
+                                writer = candidate;
+                                break;
+                            }
+                        }
+                        if (writer == null) {
+                            writer = ImageIO.getImageWritersByFormatName("jpeg").next();
+                        }
+
+                        JPEGImageWriteParam param =
+                                (JPEGImageWriteParam) writer.getDefaultWriteParam();
+
+                        // Set advanced compression parameters
+                        param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
+                        param.setCompressionQuality(jpegQuality);
+                        param.setOptimizeHuffmanTables(true); // Better compression
+                        param.setProgressiveMode(
+                                ImageWriteParam.MODE_DEFAULT); // Progressive scanning
+
+                        // Write compressed image
+                        try (ImageOutputStream ios =
+                                ImageIO.createImageOutputStream(originalImageStream)) {
+                            writer.setOutput(ios);
+                            writer.write(null, new IIOImage(scaledImage, null, null), param);
+                        }
+                        writer.dispose();
+                    } else {
+                        ImageIO.write(bufferedImage, format, originalImageStream);
+                    }
+                    int originalEncodedSize = (int) image.getCOSObject().getLength();
+                    originalImageStream.close();
+
+                    // Now compress the scaled image
+                    ByteArrayOutputStream compressedImageStream = new ByteArrayOutputStream();
+                    if (format.equals("jpeg")) {
+                        Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(format);
+                        if (writers.hasNext()) {
+                            ImageWriter writer = writers.next();
+                            ImageWriteParam param = writer.getDefaultWriteParam();
+
+                            if (param.canWriteCompressed()) {
+                                param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
+                                param.setCompressionQuality(jpegQuality);
+
+                                ImageOutputStream imageOut =
+                                        ImageIO.createImageOutputStream(compressedImageStream);
+                                writer.setOutput(imageOut);
+                                writer.write(null, new IIOImage(scaledImage, null, null), param);
+                                writer.dispose();
+                                imageOut.close();
+                            } else {
+                                ImageIO.write(scaledImage, format, compressedImageStream);
+                            }
+                        } else {
+                            ImageIO.write(scaledImage, format, compressedImageStream);
+                        }
+                    } else {
+                        ImageIO.write(scaledImage, format, compressedImageStream);
                    }
-                            ByteArrayOutputStream compressedImageStream =
-                                    new ByteArrayOutputStream();
-                            ImageIO.write(scaledBufferedImage, "jpeg", compressedImageStream);
                    byte[] imageBytes = compressedImageStream.toByteArray();
                    compressedImageStream.close();

+                    // Format sizes using our utility method
+                    String originalSizeStr = GeneralUtils.formatBytes(originalEncodedSize);
+                    String compressedSizeStr = GeneralUtils.formatBytes(imageBytes.length);
+
+                    // Calculate reduction percentage (how much smaller the new file is)
+                    double reductionPercentage =
+                            100.0 - ((imageBytes.length * 100.0) / originalEncodedSize);
+
+                    if (imageBytes.length >= originalEncodedSize) {
+                        log.info(
+                                "Page {}, Image {}: Compressed size {} not smaller than original {}, skipping replacement",
+                                pageNum + 1,
+                                imageName,
+                                GeneralUtils.formatBytes(imageBytes.length),
+                                GeneralUtils.formatBytes(originalEncodedSize));
+
+                        // Accumulate original size for both counters (no change)
+                        totalOriginalBytes += originalEncodedSize;
+                        totalCompressedBytes += originalEncodedSize;
+                        skippedImages++;
+                        processedImages.add(imageName);
+                        continue;
+                    }
+                    log.info(
+                            "Page {}, Image {}: Compressed from {} to {} (reduced by {}%)",
+                            pageNum + 1,
+                            imageName,
+                            originalSizeStr,
+                            compressedSizeStr,
+                            String.format("%.1f", reductionPercentage));
+
+                    // Only replace if compressed size is smaller
                    PDImageXObject compressedImage =
                            PDImageXObject.createFromByteArray(
                                    doc, imageBytes, image.getCOSObject().toString());
                    res.put(name, compressedImage);
+
+                    // Update counters with compressed size
+                    totalOriginalBytes += originalEncodedSize;
+                    totalCompressedBytes += imageBytes.length;
+                    compressedImages++;
+                    processedImages.add(imageName);
                }
            }
+
+            // Log overall image compression statistics
+            double overallImageReduction =
+                    totalOriginalBytes > 0
+                            ? 100.0 - ((totalCompressedBytes * 100.0) / totalOriginalBytes)
+                            : 0;
+
+            log.info(
+                    "Image compression summary - Total: {}, Compressed: {}, Skipped: {}",
+                    totalImages,
+                    compressedImages,
+                    skippedImages);
+            log.info(
+                    "Total original image size: {}, compressed: {} (reduced by {:.1f}%)",
+                    GeneralUtils.formatBytes(totalOriginalBytes),
+                    GeneralUtils.formatBytes(totalCompressedBytes),
+                    overallImageReduction);
+
+            // Save the document
+            log.info("Saving compressed PDF to {}", pdfFile.toString());
+            doc.save(pdfFile.toString());
+
+            // Log overall file size reduction
+            long compressedFileSize = Files.size(pdfFile);
+            double overallReduction = 100.0 - ((compressedFileSize * 100.0) / originalFileSize);
+            log.info(
+                    "Overall PDF compression: {} → {} (reduced by {:.1f}%)",
+                    GeneralUtils.formatBytes(originalFileSize),
+                    GeneralUtils.formatBytes(compressedFileSize),
+                    overallReduction);
        }
    }
-            Path tempOutput = Files.createTempFile("output_", ".pdf");
-            doc.save(tempOutput.toString());
-            Files.move(tempOutput, pdfFile, StandardCopyOption.REPLACE_EXISTING);
+
+    // Updated scale factor method for levels 4-9
+    private double getScaleFactorForLevel(int optimizeLevel) {
+        return switch (optimizeLevel) {
+            case 4 -> 0.9; // 90% of original size - lite image compression
+            case 5 -> 0.8; // 80% of original size - lite image compression
+            case 6 -> 0.7; // 70% of original size - lite image compression
+            case 7 -> 0.6; // 60% of original size - intense image compression
+            case 8 -> 0.5; // 50% of original size - intense image compression
+            case 9, 10 -> 0.4; // 40% of original size - intense image compression
+            default -> 1.0; // No image scaling for levels 1-3
+        };
    }
+    
+    // New method for JPEG quality based on optimization level
+    private float getJpegQualityForLevel(int optimizeLevel) {
+        return switch (optimizeLevel) {
+            case 7 -> 0.8f; // 80% quality - intense compression
+            case 8 -> 0.6f; // 60% quality - more intense compression
+            case 9, 10 -> 0.4f; // 40% quality - most intense compression
+            default -> 0.7f; // 70% quality for levels 1-6 (higher quality)
+        };
    }

    @PostMapping(consumes = "multipart/form-data", value = "/compress-pdf")
    @Operation(
            summary = "Optimize PDF file",
            description =
-                    "This endpoint accepts a PDF file and optimizes it based on the provided"
-                        + " parameters. Input:PDF Output:PDF Type:SISO")
+                    "This endpoint accepts a PDF file and optimizes it based on the provided parameters. Input:PDF Output:PDF Type:SISO")
    public ResponseEntity<byte[]> optimizePdf(@ModelAttribute OptimizePdfRequest request)
            throws Exception {
        MultipartFile inputFile = request.getFileInput();
@ -153,21 +414,31 @@ public class CompressController {
            }

            boolean sizeMet = false;
-            boolean grayscaleEnabled = Boolean.TRUE.equals(request.getGrayscale());
-            while (!sizeMet && optimizeLevel <= 9) {
+            boolean imageCompressionApplied = false; // Track if we've already compressed images
+            boolean qpdfCompressionApplied = false;
            
-                // 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, grayscaleEnabled);
+            while (!sizeMet && optimizeLevel <= 9) {
+                // Apply appropriate compression based on level
+                
+                // Levels 4-9: Apply image compression
+                if (optimizeLevel >= 4 && !imageCompressionApplied) {
+                    double scaleFactor = getScaleFactorForLevel(optimizeLevel);
+                    float jpegQuality = getJpegQualityForLevel(optimizeLevel);
+                    compressImagesInPDF(tempInputFile, scaleFactor, jpegQuality);
+                    imageCompressionApplied = true; // Mark that we've compressed images
+                }
+                
+                // All levels (1-9): Apply QPDF compression
+                if (!qpdfCompressionApplied) {
+                	long preQpdfSize = Files.size(tempInputFile);
+                	log.info("Pre-QPDF file size: {}", GeneralUtils.formatBytes(preQpdfSize));
+                	
+                    // For levels 1-3, map to qpdf compression levels 1-9
+                    int qpdfCompressionLevel = optimizeLevel;
+                    if (optimizeLevel <= 3) {
+                        qpdfCompressionLevel = optimizeLevel * 3; // Level 1->3, 2->6, 3->9
+                    } else {
+                        qpdfCompressionLevel = 9; // Max QPDF compression for levels 4-9
                    }
                    
                    // Run QPDF optimization
@ -179,12 +450,10 @@ public class CompressController {
                    if (request.getLinearize()) {
                        command.add("--linearize");
                    }
-                command.add("--optimize-images");
                    command.add("--recompress-flate");
-                command.add("--compression-level=" + optimizeLevel);
+                    command.add("--compression-level=" + qpdfCompressionLevel);
                    command.add("--compress-streams=y");
                    command.add("--object-streams=generate");
-                command.add("--no-warn");
                    command.add(tempInputFile.toString());
                    command.add(tempOutputFile.toString());

@ -193,24 +462,45 @@ public class CompressController {
                        returnCode =
                                ProcessExecutor.getInstance(ProcessExecutor.Processes.QPDF)
                                        .runCommandWithOutputHandling(command);
+                        qpdfCompressionApplied = true;
                    } catch (Exception e) {
                        if (returnCode != null && returnCode.getRc() != 3) {
                            throw e;
                        }
                    }
+                    long postQpdfSize = Files.size(tempOutputFile);
+                    double qpdfReduction = 100.0 - ((postQpdfSize * 100.0) / preQpdfSize);
+                    log.info(
+                            "Post-QPDF file size: {} (reduced by {:.1f}%)",
+                            GeneralUtils.formatBytes(postQpdfSize),
+                            qpdfReduction);
+                    
+                } else {
+                    tempOutputFile = tempInputFile;
+                }

                // Check if file size is within expected size or not auto mode
                long outputFileSize = Files.size(tempOutputFile);
                if (outputFileSize <= expectedOutputSize || !autoMode) {
                    sizeMet = true;
                } else {
-                    optimizeLevel =
+                    int newOptimizeLevel =
                            incrementOptimizeLevel(
                                    optimizeLevel, outputFileSize, expectedOutputSize);
-                    if (autoMode && optimizeLevel >= 9) {
-                        log.info("Maximum compression level reached in auto mode");
+
+                    // Check if we can't increase the level further
+                    if (newOptimizeLevel == optimizeLevel) {
+                        if (autoMode) {
+                            log.info(
+                                    "Maximum optimization level reached without meeting target size.");
                            sizeMet = true;
                        }
+                    } else {
+                        // Reset image compression if moving to a new level
+                        imageCompressionApplied = false;
+                        qpdfCompressionApplied = false;
+                        optimizeLevel = newOptimizeLevel;
+                    }
                }
            }

@ -221,8 +511,7 @@ public class CompressController {
            // Check if optimized file is larger than the original
            if (pdfBytes.length > inputFileSize) {
                log.warn(
-                        "Optimized file is larger than the original. Returning the original file"
-                            + " instead.");
+                        "Optimized file is larger than the original. Returning the original file instead.");
                finalFile = tempInputFile;
            }

@ -243,10 +532,10 @@ public class CompressController {
        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;
+        if (sizeReductionRatio > 0.3) return 5;
+        if (sizeReductionRatio > 0.2) return 6;
+        if (sizeReductionRatio > 0.15) return 7;
+        if (sizeReductionRatio > 0.1) return 8;
        return 9;
    }

--- a/src/main/java/stirling/software/SPDF/utils/GeneralUtils.java
+++ b/src/main/java/stirling/software/SPDF/utils/GeneralUtils.java
@ -173,6 +173,18 @@ public class GeneralUtils {
        return null;
    }

+    public static String formatBytes(long bytes) {
+        if (bytes < 1024) {
+            return bytes + " B";
+        } else if (bytes < 1024 * 1024) {
+            return String.format("%.2f KB", bytes / 1024.0);
+        } else if (bytes < 1024 * 1024 * 1024) {
+            return String.format("%.2f MB", bytes / (1024.0 * 1024.0));
+        } else {
+            return String.format("%.2f GB", bytes / (1024.0 * 1024.0 * 1024.0));
+        }
+    }
+
    public static List<Integer> parsePageList(String pages, int totalPages, boolean oneBased) {
        if (pages == null) {
            return List.of(1); // Default to first page if input is null
--- a/src/main/resources/messages_ar_AR.properties
+++ b/src/main/resources/messages_ar_AR.properties
@ -931,10 +931,9 @@ compress.title=ضغط
 compress.header=ضغط ملف PDF
 compress.credit=تستخدم هذه الخدمة qpdf لضغط / تحسين PDF.
 compress.grayscale.label=تطبيق التدرج الرمادي للضغط
-compress.selectText.1=الوضع اليدوي - من 1 إلى 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=مستوى التحسين:
-compress.selectText.3=4 (رهيب للصور النصية)
 compress.selectText.4=الوضع التلقائي - يضبط الجودة تلقائيًا للحصول على ملف PDF بالحجم المحدد
 compress.selectText.5=حجم PDF المتوقع (على سبيل المثال 25 ميجا بايت، 10.8 ميجا بايت، 25 كيلو بايت)
 compress.submit=ضغط
--- a/src/main/resources/messages_az_AZ.properties
+++ b/src/main/resources/messages_az_AZ.properties
@ -931,10 +931,9 @@ compress.title=Sıxışdır
 compress.header=PDF-i Sıxışdır
 compress.credit=Bu servis PDF sıxışdırılması/Optimizasiyası üçün Ghostscript istifadə edir.
 compress.grayscale.label=Sıxma üçün Boz Rəng Tətbiq Edin
-compress.selectText.1=Manual Mod - 1-dən 5-ə
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimizasiya səviyyəsi:
-compress.selectText.3=4 (Mətn şəkilləri üçün yaxşı deyil)
 compress.selectText.4=Avto mod - PDF-in dəqiq ölçüsünü əldə etmək üçün keyfiyyəti avtomatik tənzimləyir
 compress.selectText.5=Gözlənilən PDF Ölçüsü (məsələn, 25MB, 10.8MB, 25KB)
 compress.submit=Sıxışdır
--- a/src/main/resources/messages_bg_BG.properties
+++ b/src/main/resources/messages_bg_BG.properties
@ -931,10 +931,9 @@ compress.title=Компресиране
 compress.header=Компресиране на PDF
 compress.credit=Тази услуга използва qpdf за PDF компресиране/оптимизиране.
 compress.grayscale.label=Приложи сива скала за компресиране
-compress.selectText.1=Ръчен режим - от 1 до 5
-compress.selectText.1.1=При нива на оптимизация от 6 до 9, в допълнение към общото компресиране на PDF, резолюцията на изображението се намалява, за да се намали допълнително размерът на файла. По-високите нива водят до по-силна компресия на изображенията (до 50% от оригиналния размер), като се постига по-голямо намаляване на размера, но с потенциална загуба на качество на изображенията.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Ниво на оптимизация:
-compress.selectText.3=4 (Ужасно за текстови изображения)
 compress.selectText.4=Автоматичен режим - Автоматично настройва качеството, за да получи PDF с точен размер
 compress.selectText.5=Очакван PDF размер (напр. 25МБ, 10.8МБ, 25КБ)
 compress.submit=Компресиране
--- a/src/main/resources/messages_ca_CA.properties
+++ b/src/main/resources/messages_ca_CA.properties
@ -931,10 +931,9 @@ compress.title=Comprimir
 compress.header=Comprimir PDF
 compress.credit=Aquest servei utilitza qpdf per a la compressió/optimització de PDF.
 compress.grayscale.label=Aplicar escala de grisos per a la compressió
-compress.selectText.1=Mode manual: de l'1 al 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Nivell d'optimització:
-compress.selectText.3=4 (terrible per a imatges de text)
 compress.selectText.4=Mode automàtic: ajusta automàticament la qualitat perquè el PDF tingui la mida exacta
 compress.selectText.5=Mida esperada del PDF (p. ex. 25 MB, 10,8 MB, 25 KB)
 compress.submit=Comprimir
--- a/src/main/resources/messages_cs_CZ.properties
+++ b/src/main/resources/messages_cs_CZ.properties
@ -931,10 +931,9 @@ compress.title=Komprimovat
 compress.header=Komprimovat PDF
 compress.credit=Tato služba používá qpdf pro kompresi/optimalizaci PDF.
 compress.grayscale.label=Použít stupnici šedi pro kompresi
-compress.selectText.1=Ruční režim - Od 1 do 5
-compress.selectText.1.1=V úrovních optimalizace 6 až 9 je kromě obecné komprese PDF sníženo rozlišení obrázků pro další zmenšení velikosti souboru. Vyšší úrovně vedou k silnější kompresi obrázků (až na 50 % původní velikosti), čímž dosahují většího zmenšení velikosti, ale s potenciální ztrátou kvality obrázků.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Úroveň optimalizace:
-compress.selectText.3=4 (Špatné pro textové obrázky)
 compress.selectText.4=Automatický režim - Automaticky upravuje kvalitu pro dosažení přesné velikosti PDF
 compress.selectText.5=Očekávaná velikost PDF (např. 25MB, 10.8MB, 25KB)
 compress.submit=Komprimovat
--- a/src/main/resources/messages_da_DK.properties
+++ b/src/main/resources/messages_da_DK.properties
@ -931,10 +931,9 @@ compress.title=Komprimer
 compress.header=Komprimer PDF
 compress.credit=Denne tjeneste bruger qpdf til PDF Komprimering/Optimering.
 compress.grayscale.label=Anvend gråskala til komprimering
-compress.selectText.1=Manuel Tilstand - Fra 1 til 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimeringsniveau:
-compress.selectText.3=4 (Forfærdelig for tekstbilleder)
 compress.selectText.4=Auto tilstand - Justerer automatisk kvaliteten for at få PDF'en til en præcis størrelse
 compress.selectText.5=Forventet PDF-størrelse (f.eks. 25MB, 10.8MB, 25KB)
 compress.submit=Komprimer
--- a/src/main/resources/messages_de_DE.properties
+++ b/src/main/resources/messages_de_DE.properties
@ -931,10 +931,9 @@ compress.title=Komprimieren
 compress.header=PDF komprimieren
 compress.credit=Dieser Dienst verwendet qpdf für die PDF-Komprimierung/-Optimierung.
 compress.grayscale.label=Graustufen für Komprimierung anwenden
-compress.selectText.1=Manueller Modus – Von 1 bis 5
-compress.selectText.1.1=In den Optimierungsstufen 6 bis 9 wird zusätzlich zur allgemeinen PDF-Komprimierung die Bildauflösung reduziert, um die Dateigröße weiter zu verringern. Höhere Stufen führen zu einer stärkeren Bildkomprimierung (bis zu 50 % der Originalgröße), wodurch eine stärkere Größenreduzierung erreicht wird, die jedoch mit einem möglichen Qualitätsverlust der Bilder einhergeht.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimierungsstufe:
-compress.selectText.3=4 (Schrecklich für Textbilder)
 compress.selectText.4=Automatischer Modus – Passt die Qualität automatisch an, um das PDF auf die exakte Größe zu bringen
 compress.selectText.5=Erwartete PDF-Größe (z.B. 25 MB, 10,8 MB, 25 KB)
 compress.submit=Komprimieren
--- a/src/main/resources/messages_el_GR.properties
+++ b/src/main/resources/messages_el_GR.properties
@ -931,10 +931,9 @@ compress.title=Συμπίεση
 compress.header=Συμπίεση PDF
 compress.credit=Αυτή η υπηρεσία χρησιμοποιεί qpdf για συμπίεση/βελτιστοποίηση PDF.
 compress.grayscale.label=Εφαρμογή κλίμακας του γκρι για συμπίεση
-compress.selectText.1=Χειροκίνητη λειτουργία - Από 1 έως 5
-compress.selectText.1.1=Στα επίπεδα βελτιστοποίησης 6 έως 9, εκτός από τη γενική συμπίεση PDF, η ανάλυση εικόνας μειώνεται για περαιτέρω μείωση του μεγέθους αρχείου. Υψηλότερα επίπεδα οδηγούν σε ισχυρότερη συμπίεση εικόνας (έως και 50% του αρχικού μεγέθους), επιτυγχάνοντας μεγαλύτερη μείωση μεγέθους αλλά με πιθανή απώλεια ποιότητας στις εικόνες.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Επίπεδο βελτιστοποίησης:
-compress.selectText.3=4 (Απαίσιο για εικόνες κειμένου)
 compress.selectText.4=Αυτόματη λειτουργία - Αυτόματη προσαρμογή ποιότητας για επίτευξη ακριβούς μεγέθους PDF
 compress.selectText.5=Αναμενόμενο μέγεθος PDF (π.χ. 25MB, 10.8MB, 25KB)
 compress.submit=Συμπίεση
--- a/src/main/resources/messages_en_GB.properties
+++ b/src/main/resources/messages_en_GB.properties
@ -931,10 +931,9 @@ compress.title=Compress
 compress.header=Compress PDF
 compress.credit=This service uses qpdf for PDF Compress/Optimisation.
 compress.grayscale.label=Apply Grayscale for Compression
-compress.selectText.1=Manual Mode - From 1 to 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimisation level:
-compress.selectText.3=4 (Terrible for text images)
 compress.selectText.4=Auto mode - Auto adjusts quality to get PDF to exact size
 compress.selectText.5=Expected PDF Size (e.g. 25MB, 10.8MB, 25KB)
 compress.submit=Compress
--- a/src/main/resources/messages_en_US.properties
+++ b/src/main/resources/messages_en_US.properties
@ -931,10 +931,9 @@ compress.title=Compress
 compress.header=Compress PDF
 compress.credit=This service uses qpdf for PDF Compress/Optimisation.
 compress.grayscale.label=Apply Grayscale for Compression
-compress.selectText.1=Manual Mode - From 1 to 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimization level:
-compress.selectText.3=4 (Terrible for text images)
 compress.selectText.4=Auto mode - Auto adjusts quality to get PDF to exact size
 compress.selectText.5=Expected PDF Size (e.g. 25MB, 10.8MB, 25KB)
 compress.submit=Compress
--- a/src/main/resources/messages_es_ES.properties
+++ b/src/main/resources/messages_es_ES.properties
@ -931,10 +931,9 @@ compress.title=Comprimir
 compress.header=Comprimir PDF
 compress.credit=Este servicio utiliza qpdf para compresión/optimización de PDF
 compress.grayscale.label=Aplicar escala de grises para compresión
-compress.selectText.1=Modo manual - De 1 a 5
-compress.selectText.1.1=En los niveles de optimización 6 a 9, además de la compresión general de PDF, se reduce la resolución de la imagen para reducir aún más el tamaño del archivo. Los niveles más altos dan como resultado una mayor compresión de la imagen (hasta el 50 % del tamaño original), lo que permite lograr una mayor reducción del tamaño, pero con una posible pérdida de calidad en las imágenes.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Nivel de optimización:
-compress.selectText.3=4 (Terrible para imágenes de texto)
 compress.selectText.4=Modo automático: ajusta automáticamente la calidad para que el PDF tenga el tamaño exacto
 compress.selectText.5=Tamaño esperado del PDF (por ejemplo, 25 MB, 10.8 MB, 25 KB)
 compress.submit=Comprimir
--- a/src/main/resources/messages_eu_ES.properties
+++ b/src/main/resources/messages_eu_ES.properties
@ -931,10 +931,9 @@ compress.title=Konprimatu
 compress.header=PDFa konprimatu
 compress.credit=Zerbitzu honek qpdf erabiltzen du PDFak komprimatzeko/optimizatzeko
 compress.grayscale.label=Aplikatu grisezko eskala konpresiorako
-compress.selectText.1=Eskuz 1etik 5ra
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimizazio maila:
-compress.selectText.3=4 (Izugarria testu-irudietarako)
 compress.selectText.4=Automatikoa: automatikoki egokitzen du kalitatea PDFak tamaina doi-doia izan dezan
 compress.selectText.5=PDFaren espero den tamaina (adibidez, 25 MB, 10.8 MB, 25 KB)
 compress.submit=Konprimatu
--- a/src/main/resources/messages_fa_IR.properties
+++ b/src/main/resources/messages_fa_IR.properties
@ -931,10 +931,9 @@ compress.title=فشرده‌سازی
 compress.header=فشرده‌سازی PDF
 compress.credit=این سرویس از qpdf برای فشرده‌سازی / بهینه‌سازی PDF استفاده می‌کند.
 compress.grayscale.label=اعمال مقیاس خاکستری برای فشرده‌سازی
-compress.selectText.1=حالت دستی - از 1 تا 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=سطح بهینه‌سازی:
-compress.selectText.3=۴ (خیلی بد برای تصاویر متنی)
 compress.selectText.4=حالت خودکار - کیفیت را به طور خودکار تنظیم می‌کند تا PDF به اندازه دقیق برسد
 compress.selectText.5=اندازه PDF مورد انتظار (مثلاً ۲۵MB، ۱۰.۸MB، ۲۵KB)
 compress.submit=فشرده‌سازی
--- a/src/main/resources/messages_fr_FR.properties
+++ b/src/main/resources/messages_fr_FR.properties
@ -931,10 +931,9 @@ compress.title=Compresser un PDF
 compress.header=Compresser un PDF (lorsque c'est possible!)
 compress.credit=Ce service utilise qpdf pour la compression et l'optimisation des PDF.
 compress.grayscale.label=Appliquer l'échelle de gris pour la compression
-compress.selectText.1=Mode manuel – de 1 à 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Niveau d'optimisation
-compress.selectText.3=4 (terrible pour les images textuelles)
 compress.selectText.4=Mode automatique – ajuste automatiquement la qualité pour obtenir le PDF à la taille exacte
 compress.selectText.5=Taille PDF attendue (par exemple, 25 MB, 10,8 MB, 25 KB)
 compress.submit=Compresser
--- a/src/main/resources/messages_ga_IE.properties
+++ b/src/main/resources/messages_ga_IE.properties
@ -931,10 +931,9 @@ compress.title=Comhbhrúigh
 compress.header=Comhbhrúigh PDF
 compress.credit=Úsáideann an tseirbhís seo qpdf le haghaidh Comhbhrú/Optimization PDF.
 compress.grayscale.label=Cuir Scála Liath i bhFeidhm le Comhbhrú
-compress.selectText.1=Mód Láimhe - Ó 1 go 5
-compress.selectText.1.1=I leibhéil optamaithe 6 go 9, chomh maith le comhbhrú ginearálta PDF, déantar réiteach íomhá a laghdú de réir scála chun méid comhaid a laghdú tuilleadh. Mar thoradh ar leibhéil níos airde tá comhbhrú íomhá níos láidre (suas le 50% den mhéid bunaidh), ag baint amach laghdú méide níos mó ach le caillteanas cáilíochta féideartha in íomhánna.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Leibhéal optamaithe:
-compress.selectText.3=4 (Uafásach le haghaidh íomhánna téacs)
 compress.selectText.4=Mód uathoibríoch - Coigeartaíonn Auto cáilíocht chun PDF a fháil go dtí an méid cruinn
 compress.selectText.5=Méid PDF a bhfuiltear ag súil leis (m.sh. 25MB, 10.8MB, 25KB)
 compress.submit=Comhbhrúigh
--- a/src/main/resources/messages_hi_IN.properties
+++ b/src/main/resources/messages_hi_IN.properties
@ -931,10 +931,9 @@ compress.title=कम्प्रेस
 compress.header=PDF कम्प्रेस करें
 compress.credit=यह सेवा PDF कम्प्रेस/अनुकूलन के लिए qpdf का उपयोग करती है।
 compress.grayscale.label=संपीड़न के लिए ग्रेस्केल लागू करें
-compress.selectText.1=मैनुअल मोड - स्तर 1 से 4
-compress.selectText.1.1=अनुकूलन स्तर 6 से 9 में, सामान्य PDF कम्प्रेसन के अतिरिक्त, फ़ाइल आकार को और कम करने के लिए छवि रेज़ोल्यूशन को कम किया जाता है। उच्च स्तर पर छवियों का अधिक कम्प्रेसन होता है (मूल आकार का 50% तक), जिससे आकार में अधिक कमी आती है लेकिन छवियों की गुणवत्ता प्रभावित हो सकती है।
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=अनुकूलन स्तर:
-compress.selectText.3=4 (टेक्स्ट छवियों के लिए बहुत खराब)
 compress.selectText.4=स्वतः मोड - PDF को सटीक आकार प्राप्त करने के लिए गुणवत्ता को स्वतः समायोजित करता है
 compress.selectText.5=अपेक्षित PDF आकार (जैसे 25MB, 10.8MB, 25KB)
 compress.submit=कम्प्रेस करें
--- a/src/main/resources/messages_hr_HR.properties
+++ b/src/main/resources/messages_hr_HR.properties
@ -931,10 +931,9 @@ compress.title=Komprimirajte
 compress.header=Komprimirajte PDF
 compress.credit=Ova usluga koristi qpdf za komprimiranje / optimizaciju PDF-a.
 compress.grayscale.label=Primijeni sivinu za kompresiju
-compress.selectText.1=Ručni režim - Od 1 do 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Nivo optimizacije:
-compress.selectText.3=4 (Užasno za tekstualne slike)
 compress.selectText.4=Automatski način - Automatski prilagođava kvalitetu kako bi PDF dobio točnu veličinu
 compress.selectText.5=Očekivana veličina PDF-a (npr. 25 MB, 10,8 MB, 25 KB)
 compress.submit=Kompresiraj
--- a/src/main/resources/messages_hu_HU.properties
+++ b/src/main/resources/messages_hu_HU.properties
@ -931,10 +931,9 @@ compress.title=Tömörítés
 compress.header=PDF tömörítése
 compress.credit=Ez a szolgáltatás a qpdf használatával végzi a PDF tömörítését/optimalizálását.
 compress.grayscale.label=Szürkeárnyalatok alkalmazása tömörítéshez
-compress.selectText.1=Kézi mód - 1-től 5-ig
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimalizálási szint:
-compress.selectText.3=4 (Szöveges képeknél nem ajánlott)
 compress.selectText.4=Automatikus mód - Automatikusan állítja a minőséget a megadott PDF méret eléréséhez
 compress.selectText.5=Kívánt PDF méret (pl. 25MB, 10.8MB, 25KB)
 compress.submit=Tömörítés
--- a/src/main/resources/messages_id_ID.properties
+++ b/src/main/resources/messages_id_ID.properties
@ -931,10 +931,9 @@ compress.title=Kompres
 compress.header=Kompres PDF
 compress.credit=Layanan ini menggunakan qpdf untuk Kompresi/Optimalisasi PDF.
 compress.grayscale.label=Terapkan Skala Abu-Abu untuk Kompresi
-compress.selectText.1=Mode Manual - Dari 1 hingga 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Tingkat Optimalisasi:
-compress.selectText.3=4 (Buruk untuk gambar teks)
 compress.selectText.4=Mode Otomatis - Menyesuaikan kualitas secara otomatis untuk mendapatkan PDF dengan ukuran yang tepat
 compress.selectText.5=Ukuran PDF yang diharapkan (mis. 25MB, 10,8MB, 25KB)
 compress.submit=Kompres
--- a/src/main/resources/messages_it_IT.properties
+++ b/src/main/resources/messages_it_IT.properties
@ -931,10 +931,9 @@ compress.title=Comprimi
 compress.header=Comprimi PDF
 compress.credit=Questo servizio utilizza qpdf per la compressione/ottimizzazione dei PDF.
 compress.grayscale.label=Applica scala di grigio per la compressione
-compress.selectText.1=Modalità manuale - Da 1 a 5
-compress.selectText.1.1=Nei livelli di ottimizzazione da 6 a 9, oltre alla compressione PDF generale, la risoluzione dell'immagine viene ridotta per ridurre ulteriormente le dimensioni del file. Livelli più alti comportano una compressione dell'immagine più forte (fino al 50% delle dimensioni originali), ottenendo una maggiore riduzione delle dimensioni ma con una potenziale perdita di qualità nelle immagini.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Livello di ottimizzazione:
-compress.selectText.3=4 (Terribile per le immagini di testo)
 compress.selectText.4=Modalità automatica - Regola automaticamente la qualità per ottenere le dimensioni esatte del PDF
 compress.selectText.5=Dimensioni PDF previste (ad es. 25 MB, 10,8 MB, 25 KB)
 compress.submit=Comprimi
--- a/src/main/resources/messages_ja_JP.properties
+++ b/src/main/resources/messages_ja_JP.properties
@ -931,10 +931,9 @@ 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qpdfを使用しています。
 compress.grayscale.label=圧縮にグレースケールを適用する
-compress.selectText.1=手動モード - 1から9
-compress.selectText.1.1=最適化レベル6～9では、一般的なPDF圧縮に加えて画像解像度が縮小され、ファイルサイズがさらに縮小されます。レベルが高くなると、画像圧縮が強化され (元のサイズの最大 50%)、サイズはさらに縮小されますが、画像の品質が低下する可能性があります。
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=品質レベル:
-compress.selectText.3=4 (テキスト画像は最悪)
 compress.selectText.4=自動モード - PDFを正確なサイズにするために品質を自動調整する。
 compress.selectText.5=PDFサイズ (例:25MB, 10.8MB, 25KB)
 compress.submit=圧縮
--- a/src/main/resources/messages_ko_KR.properties
+++ b/src/main/resources/messages_ko_KR.properties
@ -931,10 +931,9 @@ compress.title=압축
 compress.header=PDF 압축
 compress.credit=이 서비스는 PDF 압축/최적화를 위해 qpdf를 사용합니다.
 compress.grayscale.label=압축을 위해 그레이스케일 적용
-compress.selectText.1=수동 모드 - 1에서 5
-compress.selectText.1.1=최적화 레벨 6에서 9에서는 일반적인 PDF 압축 외에도 이미지 해상도가 낮아져 파일 크기가 더욱 감소합니다. 높은 레벨은 더 강력한 이미지 압축(원본 크기의 최대 50%)을 초래하여 더 큰 크기 감소를 달성하지만 이미지 품질이 저하될 수 있습니다.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=최적화 레벨:
-compress.selectText.3=4 (텍스트 이미지에는 좋지 않음)
 compress.selectText.4=자동 모드 - PDF를 정확한 크기로 만들기 위해 품질 자동 조정
 compress.selectText.5=예상 PDF 크기 (예: 25MB, 10.8MB, 25KB)
 compress.submit=압축
--- a/src/main/resources/messages_nl_NL.properties
+++ b/src/main/resources/messages_nl_NL.properties
@ -931,10 +931,9 @@ compress.title=Comprimeren
 compress.header=PDF comprimeren
 compress.credit=Deze functie gebruikt qpdf voor PDF Compressie/Optimalisatie.
 compress.grayscale.label=Grijsschaal toepassen voor compressie
-compress.selectText.1=Handmatige modus - Van 1 tot 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimalisatieniveau:
-compress.selectText.3=4 (Verschrikkelijk voor tekstafbeeldingen)
 compress.selectText.4=Automatische modus - Past kwaliteit automatisch aan om PDF naar exacte grootte te krijgen
 compress.selectText.5=Verwachte PDF-grootte (bijv. 25MB, 10.8MB, 25KB)
 compress.submit=Comprimeren
--- a/src/main/resources/messages_no_NB.properties
+++ b/src/main/resources/messages_no_NB.properties
@ -931,10 +931,9 @@ compress.title=Komprimer
 compress.header=Komprimer PDF
 compress.credit=Denne tjenesten bruker qpdf for PDF-komprimering/optimisering.
 compress.grayscale.label=Bruk gråskala for komprimering
-compress.selectText.1=Manuell modus - Fra 1 til 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimeringsnivå:
-compress.selectText.3=4 (Dårlig for tekstbilder)
 compress.selectText.4=Automatisk modus - Justerer automatisk kvaliteten for å få PDF til nøyaktig størrelse
 compress.selectText.5=Forventet PDF-størrelse (f.eks. 25MB, 10.8MB, 25KB)
 compress.submit=Komprimer
--- a/src/main/resources/messages_pl_PL.properties
+++ b/src/main/resources/messages_pl_PL.properties
@ -931,10 +931,9 @@ compress.title=Kompresuj
 compress.header=Kompresuj PDF
 compress.credit=Ta usługa używa qpdf do kompresji/optymalizacji PDF.
 compress.grayscale.label=Zastosuj skalę szarości do kompresji
-compress.selectText.1=Tryb ręczny - Od 1 do 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Poziom optymalizacji:
-compress.selectText.3=4 (Duże dla obrazów tekstowych)
 compress.selectText.4=Tryb automatyczny - Automatycznie dostosowuje jakość, aby uzyskać dokładny rozmiar pliku PDF
 compress.selectText.5=Oczekiwany rozmiar pliku PDF (np. 25 MB, 10,8 MB, 25 KB)
 compress.submit=Kompresuj
--- a/src/main/resources/messages_pt_BR.properties
+++ b/src/main/resources/messages_pt_BR.properties
@ -931,10 +931,9 @@ compress.title=Comprimir
 compress.header=Comprimir
 compress.credit=Este serviço usa o Qpdf para compressão/otimização de PDF.
 compress.grayscale.label=Aplicar escala de cinza para compressão
-compress.selectText.1=Modo Manual - De 1 a 9
-compress.selectText.1.1=Nos níveis de otimização 6-9, além da compressão normal do PDF, a resolução das imagens são reduzidas, para diminuir ainda mais o tamanho do arquivo. Quanto maior o nível, maior a compressão da imagem (até 50% do tamanho original), resultando em tamanho menor do arquivo, porém com menor qualidade nas imagens.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Nível de Otimização:
-compress.selectText.3=4 (Pior para imagens de texto)
 compress.selectText.4=Modo Automático - Ajusta automaticamente a qualidade para atingir o tamanho exato desejado
 compress.selectText.5=Tamanho esperado do PDF (por exemplo, 25 MB, 10,8 MB, 25 KB):
 compress.submit=Comprimir
--- a/src/main/resources/messages_pt_PT.properties
+++ b/src/main/resources/messages_pt_PT.properties
@ -931,10 +931,9 @@ compress.title=Comprimir
 compress.header=Comprimir PDF
 compress.credit=Este serviço usa qpdf para Compressão/Otimização de PDF.
 compress.grayscale.label=Aplicar escala de cinzentos para compressão
-compress.selectText.1=Modo Manual - De 1 a 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Nível de otimização:
-compress.selectText.3=4 (Terrível para imagens de texto)
 compress.selectText.4=Modo automático - Ajusta automaticamente a qualidade para obter o PDF com o tamanho exato
 compress.selectText.5=Tamanho esperado do PDF (ex. 25MB, 10.8MB, 25KB)
 compress.submit=Comprimir
--- a/src/main/resources/messages_ro_RO.properties
+++ b/src/main/resources/messages_ro_RO.properties
@ -931,10 +931,9 @@ compress.title=Comprimare
 compress.header=Comprimare PDF
 compress.credit=Acest serviciu utilizează qpdf pentru comprimarea/optimizarea PDF-urilor.
 compress.grayscale.label=Aplicare scală de gri pentru compresie
-compress.selectText.1=Modul manual - de la 1 la 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Nivel de optimizare:
-compress.selectText.3=4 (Îngrozitor pentru imaginile text)
 compress.selectText.4=Mod automat - ajustează automat calitatea pentru a aduce PDF-ul la dimensiunea exactă
 compress.selectText.5=Dimensiunea PDF așteptată (de ex. 25MB, 10.8MB, 25KB)
 compress.submit=Comprimare
--- a/src/main/resources/messages_ru_RU.properties
+++ b/src/main/resources/messages_ru_RU.properties
@ -931,10 +931,9 @@ compress.title=Сжать
 compress.header=Сжать PDF
 compress.credit=Этот сервис использует qpdf для сжатия/оптимизации PDF.
 compress.grayscale.label=Применить шкалу серого для сжатия
-compress.selectText.1=Ручной режим - от 1 до 5
-compress.selectText.1.1=На уровнях оптимизации от 6 до 9, помимо общего сжатия PDF, разрешение изображений уменьшается для дальнейшего сокращения размера файла. Более высокие уровни приводят к более сильному сжатию изображений (до 50% от исходного размера), обеспечивая большее уменьшение размера, но с возможной потерей качества изображений.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Уровень оптимизации:
-compress.selectText.3=4 (Ужасно для текстовых изображений)
 compress.selectText.4=Автоматический режим - автоматически настраивает качество для получения точного размера PDF
 compress.selectText.5=Ожидаемый размер PDF (например, 25MB, 10.8MB, 25KB)
 compress.submit=Сжать
--- a/src/main/resources/messages_sk_SK.properties
+++ b/src/main/resources/messages_sk_SK.properties
@ -931,10 +931,9 @@ compress.title=Komprimovať
 compress.header=Komprimovať PDF
 compress.credit=Táto služba používa qpdf pre kompresiu/optimalizáciu PDF.
 compress.grayscale.label=Použiť odtiene šedej na kompresiu
-compress.selectText.1=Manuálny režim - Od 1 do 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Úroveň optimalizácie:
-compress.selectText.3=4 (Hrozné pre textové obrázky)
 compress.selectText.4=Automatický režim - Automaticky upravuje kvalitu, aby sa PDF dostalo na presnú veľkosť
 compress.selectText.5=Očakávaná veľkosť PDF (napr. 25MB, 10.8MB, 25KB)
 compress.submit=Komprimovať
--- a/src/main/resources/messages_sl_SI.properties
+++ b/src/main/resources/messages_sl_SI.properties
@ -931,10 +931,9 @@ compress.title=Stisnite
 compress.header=Stisnite PDF
 compress.credit=Ta storitev uporablja qpdf za stiskanje/optimizacijo PDF.
 compress.grayscale.label=Uporabi sivinsko lestvico za stiskanje
-compress.selectText.1=Ročni način - Od 1 do 5
-compress.selectText.1.1=Na stopnjah optimizacije od 6 do 9 je poleg splošnega stiskanja PDF ločljivost slike zmanjšana, da se dodatno zmanjša velikost datoteke. Višje ravni povzročijo močnejše stiskanje slike (do 50 % prvotne velikosti), s čimer se doseže večje zmanjšanje velikosti, vendar s potencialno izgubo kakovosti slik.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Raven optimizacije:
-compress.selectText.3=4 (Grozno za besedilne slike)
 compress.selectText.4=Samodejni način - Samodejno prilagodi kakovost, da dobi PDF na natančno velikost
 compress.selectText.5=Pričakovana velikost PDF (npr. 25 MB, 10,8 MB, 25 KB)
 compress.submit=Stisnite
--- a/src/main/resources/messages_sr_LATN_RS.properties
+++ b/src/main/resources/messages_sr_LATN_RS.properties
@ -931,10 +931,9 @@ compress.title=Kompresija
 compress.header=Kompresuj PDF
 compress.credit=Ova usluga koristi qpdf za kompresiju / optimizaciju PDF-a.
 compress.grayscale.label=Primeni sivinu za kompresiju
-compress.selectText.1=Ručni režim - Od 1 do 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Nivo optimizacije:
-compress.selectText.3=4 (Užasno za tekstualne slike)
 compress.selectText.4=Automatski režim - Automatski prilagođava kvalitet kako bi PDF bio tačne veličine
 compress.selectText.5=Očekivana veličina PDF-a (npr. 25MB, 10.8MB, 25KB)
 compress.submit=Kompresuj
--- a/src/main/resources/messages_sv_SE.properties
+++ b/src/main/resources/messages_sv_SE.properties
@ -931,10 +931,9 @@ compress.title=Komprimera
 compress.header=Komprimera PDF
 compress.credit=Denna tjänst använder qpdf för PDF-komprimering/optimering.
 compress.grayscale.label=Tillämpa gråskala för komprimering
-compress.selectText.1=Manuellt läge - Från 1 till 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimeringsnivå:
-compress.selectText.3=4 (Fruktansvärt för textbilder)
 compress.selectText.4=Autoläge - Autojusterar kvaliteten för att få PDF till exakt storlek
 compress.selectText.5=Förväntad PDF-storlek (t.ex. 25MB, 10,8MB, 25KB)
 compress.submit=Komprimera
--- a/src/main/resources/messages_th_TH.properties
+++ b/src/main/resources/messages_th_TH.properties
@ -931,10 +931,9 @@ compress.title=บีบอัด
 compress.header=บีบอัด PDF
 compress.credit=บริการนี้ใช้ qpdf สำหรับการบีบอัด/การเพิ่มประสิทธิภาพ PDF
 compress.grayscale.label=ใช้ระดับสีเทาสำหรับการบีบอัด
-compress.selectText.1=โหมดแมนนวล - จาก 1 ถึง 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=ระดับการเพิ่มประสิทธิภาพ:
-compress.selectText.3=4 (ไม่ดีสำหรับภาพข้อความ)
 compress.selectText.4=โหมดอัตโนมัติ - ปรับคุณภาพอัตโนมัติเพื่อให้ PDF ตรงกับขนาดที่ต้องการ
 compress.selectText.5=ขนาด PDF ที่คาดหวัง (เช่น 25MB, 10.8MB, 25KB)
 compress.submit=บีบอัด
--- a/src/main/resources/messages_tr_TR.properties
+++ b/src/main/resources/messages_tr_TR.properties
@ -931,10 +931,9 @@ compress.title=Sıkıştır
 compress.header=PDF'i Sıkıştır
 compress.credit=Bu hizmet PDF Sıkıştırma/Optimizasyonu için qpdf kullanır.
 compress.grayscale.label=Sıkıştırma için Gri Ton Uygula
-compress.selectText.1=Manuel Mod - 1'den 5'e
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimizasyon seviyesi:
-compress.selectText.3=4 (Metin resimleri için hiç uygun değil)
 compress.selectText.4=Otomatik mod - PDF'in tam boyutuna ulaşmak için kaliteyi otomatik ayarlar
 compress.selectText.5=Beklenen PDF Boyutu (örn. 25MB, 10.8MB, 25KB)
 compress.submit=Sıkıştır
--- a/src/main/resources/messages_uk_UA.properties
+++ b/src/main/resources/messages_uk_UA.properties
@ -931,10 +931,9 @@ compress.title=Стиснути
 compress.header=Стиснути PDF
 compress.credit=Ця служба використовує qpdf для стиснення/оптимізації PDF.
 compress.grayscale.label=Застосувати відтінки сірого для стиснення
-compress.selectText.1=Ручний режим - від 1 до 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Рівень оптимізації:
-compress.selectText.3=4 (Жахливо для текстових зображень)
 compress.selectText.4=Автоматичний режим - автоматично налаштовує якість для отримання PDF точного розміру
 compress.selectText.5=Очікуваний розмір PDF (наприклад, 25 МБ, 10,8 МБ, 25 КБ)
 compress.submit=Стиснути
--- a/src/main/resources/messages_vi_VN.properties
+++ b/src/main/resources/messages_vi_VN.properties
@ -931,10 +931,9 @@ compress.title=Nén
 compress.header=Nén PDF
 compress.credit=Dịch vụ này sử dụng qpdf để Nén/Tối ưu hóa PDF.
 compress.grayscale.label=Áp dụng thang độ xám để nén
-compress.selectText.1=Chế độ thủ công - Từ 1 đến 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Mức độ tối ưu hóa:
-compress.selectText.3=4 (Tệ cho hình ảnh văn bản)
 compress.selectText.4=Chế độ tự động - Tự động điều chỉnh chất lượng để đạt được kích thước PDF chính xác
 compress.selectText.5=Kích thước PDF mong muốn (ví dụ: 25MB, 10.8MB, 25KB)
 compress.submit=Nén
--- a/src/main/resources/messages_zh_BO.properties
+++ b/src/main/resources/messages_zh_BO.properties
@ -931,10 +931,9 @@ compress.title=སྡུད་སྒྲིལ།
 compress.header=PDF སྡུད་སྒྲིལ།
 compress.credit=ཞབས་ཞུ་འདིས་ PDF སྡུད་སྒྲིལ་/ཡར་རྒྱས་གཏོང་བའི་ཆེད་དུ་ qpdf བེད་སྤྱོད་བྱེད་པ།
 compress.grayscale.label=应用灰度进行压缩
-compress.selectText.1=Manual Mode - From 1 to 4
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=Optimisation level:
-compress.selectText.3=4 (Terrible for text images)
 compress.selectText.4=རང་འགུལ་རྣམ་པ། - PDF ཏག་ཏག་ཆེ་ཆུང་ཚད་ལ་འཁྲིད་པའི་ཆེད་དུ་སྤུས་ཚད་རང་འགུལ་གྱིས་སྙོམ་སྒྲིག་བྱེད་པ།
 compress.selectText.5=རེ་བའི་ PDF ཆེ་ཆུང་། (དཔེར་ན། 25MB, 10.8MB, 25KB)
 compress.submit=སྡུད་སྒྲིལ།
--- a/src/main/resources/messages_zh_CN.properties
+++ b/src/main/resources/messages_zh_CN.properties
@ -931,10 +931,9 @@ compress.title=压缩
 compress.header=压缩 PDF
 compress.credit=此服务使用qpdf进行 PDF 压缩/优化。
 compress.grayscale.label=应用灰度进行压缩
-compress.selectText.1=手动模式 - 从 1 到 5
-compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 compress.selectText.2=优化级别：
-compress.selectText.3=4（文本图像很糟糕）
 compress.selectText.4=自动模式 - 自动调整质量以获得精确大小的PDF
 compress.selectText.5=预期PDF大小（例如：25MB、10.8MB、25KB）
 compress.submit=压缩
--- a/src/main/resources/messages_zh_TW.properties
+++ b/src/main/resources/messages_zh_TW.properties
@ -931,10 +931,9 @@ compress.title=壓縮
 compress.header=壓縮 PDF
 compress.credit=此服務使用 qpdf 進行 PDF 壓縮/最佳化。
 compress.grayscale.label=應用灰階進行壓縮
-compress.selectText.1=手動模式 - 從 1 到 5
-compress.selectText.1.1=在最佳化等級 6 到 9 時，除了一般 PDF 壓縮外，圖片解析度也會降低以進一步減少檔案大小。較高的壓縮等級會進行更高強度的圖片壓縮（最多可壓縮到原始大小的 50%），以達到更高的壓縮率，但可能會影響圖片品質。
+compress.selectText.1=Compression Settings
+compress.selectText.1.1=1-3 PDF compression,</br> 4-6 lite image compression,</br> 7-9 intense image compression Will dramatically reduce image quality
 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）
 compress.selectText.4=自動模式 - 自動調整品質使 PDF 達到指定的檔案大小
 compress.selectText.5=指定的 PDF 檔案大小（例如 25MB, 10.8MB, 25KB）
 compress.submit=壓縮
--- a/src/main/resources/templates/misc/compress-pdf.html
+++ b/src/main/resources/templates/misc/compress-pdf.html
@ -26,7 +26,7 @@
              <div class="card mb-3">
                <div class="card-body">
                  <h4 th:text="#{compress.selectText.1}"></h4>
-                  <p th:text="#{compress.selectText.1.1}"></p>
+                  <p th:utext="#{compress.selectText.1.1}"></p>
                  <label for="optimizeLevel" th:text="#{compress.selectText.2}"></label>
                  <select name="optimizeLevel" id="optimizeLevel" class="form-control">
                    <option value="1">1</option>