Compare two PDFs — free forever
Spot every visual difference between two PDFs.
How it works
Drop two PDFs onto the page — the first is the baseline.
Click Run and wait for the page-by-page diff to render.
Review each page and download a zip of the diff images.
Use cases
Contract revisions
Confirm that the only change between v3 and v4 is the price clause you negotiated.
Design QA
Verify a print-ready PDF matches the approved proof before sending to the printer.
Compliance checks
Prove that a circulated policy document is identical to the board-approved version.
Free account & email verification
Start working now. Create a free account and verify your email only when your PDF is ready to download. Verification keeps automated abuse off the site — it's the reason we can keep every tool free forever with no paid plan, no watermark, and no upgrade trap.
Your privacy
Your files are processed entirely in your browser — never uploaded to a PDF Pelican server. We only store anonymous analytics about which tools people use, never your file contents.
About this tool
Compare two PDFs page-by-page and see every changed pixel highlighted. Useful for contract reviews, design revisions, and confirming that two reports are identical.
FAQ
How does it find differences?
Each page is rendered to a bitmap and compared pixel by pixel. Anything that has changed visually is highlighted in red.
Does it understand text changes?
It sees them as visual differences — moved paragraphs, edited words or replaced figures all show up. It does not produce a word-level diff list.
What about pages that exist in one PDF only?
They are shown as fully red — the missing side is treated as a blank page.
Is anything uploaded?
No. Both PDFs are read locally in your browser.