DocomintCompare PDFs
See what changed between two versions of a PDF, entirely in your browser.
🔒 Processed on your device
Original PDF
Drop the original PDF here
or choose a file
Revised PDF
Drop the revised PDF here
or choose a file
How it works
- Add the original PDF and the revised PDF
- Text is extracted and diffed page by page, on your device
- Review additions and deletions highlighted inline
Frequently asked questions
Is my file uploaded anywhere?
No — this tool runs entirely in your browser using JavaScript/WebAssembly. Your file is never sent to a server.
Is there a file size limit?
Free accounts can process files up to the limit shown on this page; signing up for Pro raises that limit substantially.
Does this work on scanned PDFs?
No — comparison is based on the PDF's actual text content, not its appearance. A scanned page with no embedded text (an image only) has nothing to extract, so it won't show meaningful differences. Run OCR first if you need to compare scanned documents.