Compare PDF - Find Differences Between Two PDFs
Professional PDF comparison tool that detects text and visual changes between document versions. Free, accurate, and works in your browser. Perfect for contracts and version control.
Compare two PDF files side-by-side to identify text changes, additions, deletions, and visual differences. Our advanced comparison engine highlights all changes with color coding - additions in green, deletions in red, and modifications in yellow.
Perfect for contract review, document version control, quality assurance, and tracking revisions in reports, proposals, and legal documents. View both PDFs simultaneously with synchronized scrolling, or use diff mode for automatic change highlighting.
All comparisons happen locally in your browser. Your confidential documents never leave your device, ensuring complete privacy for sensitive contracts and proprietary information.
Why use this tool
- Visual difference detection with color-coded highlights
- Side-by-side view with synchronized scrolling
- Overlay mode for visual alignment checking
- Diff mode for automatic change highlighting
- Text-level and pixel-level comparison
- Works entirely in your browser - no uploads
- No file size limits
- Completely free with unlimited comparisons
How it works
- Upload the original PDF and the modified version
- Choose comparison mode: side-by-side, overlay, or diff
- Navigate through pages to review all changes and differences
Frequently asked questions
How accurate is the PDF comparison?
Our tool provides highly accurate text-level and visual comparison. It detects text additions, deletions, modifications, and formatting changes. Scanned PDFs are compared using pixel-level analysis.
Can I compare scanned PDFs or image-based PDFs?
Yes. Our tool performs visual comparison for scanned PDFs by analyzing pixel differences. For best results, ensure both PDFs have similar scan quality and resolution.
What types of changes can be detected?
We detect text additions and deletions, word modifications, formatting changes, image differences, layout changes, page additions/removals, and font or color variations.
Are my files uploaded to a server?
No. All PDF comparison happens entirely in your browser. Your files never leave your device, ensuring complete confidentiality for sensitive documents.
Can I compare PDFs with different page counts?
Yes. You can compare PDFs with different numbers of pages. Our tool will align matching pages and indicate when pages have been added or removed.
What is the difference between comparison modes?
Side-by-side shows both PDFs next to each other. Overlay mode superimposes documents to spot alignment differences. Diff mode highlights all changes with color coding.
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