PDF Compare
Visual side-by-side comparison with overlay blend, pixel-diff highlighting, and per-page difference statistics.
Free & unlimited
Document A (original)
Document B (modified)
All processing happens in your browser. No data is sent to any server.
About this tool
- 1
Upload two PDFs
Upload the original PDF and the revised PDF you want to compare.
- 2
View side by side
Both documents are displayed side by side with synchronized scrolling and page navigation.
- 3
See differences
Visual overlay highlights additions, deletions, and changes between the two documents.
- 4
Navigate changes
Jump between differences using next/previous buttons to review all changes.
- Use this for reviewing contract revisions - every text change is highlighted visually.
- The pixel-level comparison catches formatting changes that text-only diff tools miss.
- For scanned PDFs, the comparison is visual only - it compares page images, not extracted text.
- Side-by-side synced view
- Pixel-level diff overlay
- Next/prev change buttons
- Page-count mismatch support
- Zoom & pan controls
- Reviewing contract revisions to verify all requested changes were made
- Comparing PDF versions of design proofs before and after corrections
- Auditing document changes between regulatory filing versions
- Verifying that PDF generation produces consistent output across software versions