Compare PDF
Upload two PDF files and spot differences side-by-side with visual highlighting.
Original PDF
Click to select PDF
Modified PDF
Click to select PDF
How to use compare pdf
- 1Upload both PDFs
Select the original and the modified version.
- 2Click Compare
Both PDFs are rendered and compared page by page.
- 3Review differences
Changed pages show a red diff overlay. Identical pages are marked green.
Frequently asked questions
- Is my PDF uploaded?
- No. Comparison runs entirely in your browser.
- What counts as a change?
- Any pixel difference above the threshold (10%) is flagged. Small rendering variations are ignored.