What is Compare PDFs?
Compare two PDFs online free, without uploading them. See exactly what text was added and removed between two versions, highlighted inline — all in your browser. It runs entirely in your browser, so there's no upload, no server involved, and no account required.
When to Use Compare PDFs
Use Compare PDFs when you need to:
- Version review
- Contract review
- Proofreading
How to Use Compare PDFs
- 1.Upload the original PDF, then the revised one.
- 2.Compare PDFs extracts the text layer from both and word-diffs them.
- 3.Added text is highlighted green, removed text red, with everything unchanged shown in between for context.
- 4.Read through the differences — nothing is downloaded, both files stay in your browser.
Frequently Asked Questions
Does it compare formatting and images too?
No — it's a text comparison. It catches wording changes precisely, but not font, layout, or image changes.
Will it work on scanned PDFs?
Only if they have a text layer. Run scans through OCR PDF first, then compare.
Are my files uploaded to compare them?
No. Both PDFs are read and diffed entirely in your browser — nothing is sent anywhere.
Privacy & Security
Your compare pdfs operations are 100% private:
- Nothing is uploaded to a server
- No account or sign-up required
- Works completely offline after the page loads
- All processing happens on your device
- No tracking or analytics on your files
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