All file processing in PDFJPG runs only in the user's browser. This is called client-side processing.

• Processed within browser using JavaScript and HTML5 Canvas API
• Files are not transmitted over the internet
• Automatically released from browser memory after processing
• Works without network connection (offline capable)

Impossible. Files are processed only on the user's device, with the following security measures:

• Files never leave the user's computer
• All data is completely deleted when browser tab is closed
• Not stored in temporary files or cache
• Inaccessible to other websites or third parties

Recommended but not required. File processing itself occurs only in the browser, so it works safely on HTTP as well.

HTTPS is needed in the following cases:

• Using modern browser features (Service Worker, Clipboard API, etc.)
• Secure connection to the website itself
• Browser security policy compliance

However, since there is no network communication during file processing, it is safe regardless of HTTP/HTTPS.

Not needed at all.

• All features available without registration
• No collection of personal information such as email or phone number
• No cookies or tracking
• Ready to use immediately upon browser access

• PDF.js
• jsPDF
• Canvas API
• PDF-lib

Since there is no network communication during actual file processing, conversion work is possible even offline once the page is loaded.

Works perfectly on modern browsers.

Full Support:

• Chrome/Edge 80+ (Recommended)
• Firefox 75+
• Safari 13+
• Mobile Chrome, Safari

Limited Support:

• Internet Explorer - Not supported
• Old Android browsers (4.4 and below)

Conversion speed is affected by the following factors:

File Related:

• File size (larger files are slower)
• Number of PDF pages
• Image resolution
• PDF internal structure complexity

Device Related:

• CPU performance (JavaScript processing speed)
• RAM capacity (browser memory)
• Mobile vs Desktop

Optimized limits considering browser performance:

• PDF: Maximum 25MB
• Images: Maximum 10MB
• Batch processing: Maximum 20 files

For larger files, we recommend splitting the file or reducing quality to decrease size before conversion.

Supported input formats:

• PDF: .pdf (Adobe PDF standard)
• Images: .jpg, .jpeg, .png, .webp, .gif (excluding animations)
• Documents: Coming soon (.docx, .xlsx)

Supported output formats:

• PDF: Adobe PDF 1.7 standard
• Images: JPG, PNG, WebP

Yes, you can adjust quality settings.

PDF to Image conversion:

• Quality settings: 50%, 75%, 90%, 100%
• Output format selection: JPG, PNG, WebP
• Resolution scaling: 75%, 100%, 150%, 200%

Image to PDF conversion:

• Compression level selection
• Page size and orientation settings
• Image positioning and scaling options
• Margin and layout customization

Yes, batch processing is fully supported.

Batch processing capabilities:

• Process up to 20 files simultaneously
• Mixed format support (PDF + images)
• Individual quality settings per file
• Bulk download as ZIP file

Common causes of conversion failure:

File-related issues:

• Corrupted or damaged files
• Password-protected or encrypted PDFs
• Unsupported file format or version

Browser-related issues:

• Insufficient browser memory
• Browser compatibility issues

Solutions:

• Try a different browser or update current browser
• Reduce file size or split large files
• Close other browser tabs to free up memory

Mobile optimization tips:

• File size: Recommended under 5MB
• Memory: Close other apps to free up memory
• Connection: Use Wi-Fi for faster initial loading
• Performance: Disable battery saving mode for better CPU performance

Common download issues:

• Pop-up blocker: Allow PDFJPG site downloads
• Browser settings: Check download permissions in browser settings
• Storage space: Check if device has sufficient storage space

Alternative solutions:

• Try right-clicking the download button and selecting 'Save as'
• Use incognito/private browsing mode
• Clear browser cache and cookies

Quality improvement tips:

Best practices:

• Use high-quality source files
• Select highest quality settings (90-100%)
• Choose appropriate output format (PNG for graphics, JPG for photos)

Quality troubleshooting guide:

PDF to Image quality issues:

• Increase resolution scaling to 150% or 200%
• Use PNG format for text-heavy documents
• Select maximum quality setting (100%)

Image to PDF quality issues:

• Use high-resolution source images
• Avoid multiple compression (don't convert already compressed images)
• Choose appropriate PDF compression level