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How to Compare Two PDF Documents

Spot every change between two PDFs with side-by-side view and red difference highlights. Free, private, done in your browser.

🆓 Free ✍️ No sign-up 🔒 100% Private

Checking what changed between two versions of a contract or report by eye is slow and unreliable. PDF EAZY TOOL renders both PDFs side by side and can highlight every pixel-level difference in red, with a difference percentage for each page.

Compare two PDFs in 4 steps

  1. Open the free Compare PDFs tool and drop your first PDF into zone A.
  2. Drop the second PDF into zone B. Both documents render side by side, page by page.
  3. Flip pages with Previous and Next, or switch to Highlight differences to see every change marked in red.
  4. Use the sensitivity slider to ignore tiny rendering noise, and zoom in to inspect any change closely.
Screenshot: two PDFs compared side by side with differences highlighted in red

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Frequently asked questions

Is it free to compare two PDFs online?

Yes. The comparison tool is free, with no account and no usage limits.

Are my PDFs uploaded to a server?

No. Both documents are rendered locally in your browser and never leave your device.

Can I compare PDFs with different page counts?

Yes. A page that exists in only one file shows a placeholder note.

Why are identical-looking pages marked as different?

Tiny font-rendering differences between PDF producers can trigger the pixel comparison. Lower the sensitivity slider to ignore them.