Compare PDF
Add the original document first and the revised version second — we highlight what changed on every page. Added or removed pages are marked too.
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Max 30 MB per file. Files are deleted after 2 hours.
How to compare two PDFs
- 1
Select two PDFs
Add the original document first, then the revised version.
- 2
Compare
Press Compare PDFs. We render both documents and tint the regions that differ.
- 3
Download
Download the comparison PDF. Your files are deleted automatically after 2 hours.
Frequently asked questions
Is comparing two PDFs free on PDFKoala?
Yes, comparing two PDF versions is free — no account and no sign-up. Upload the two files and download the highlighted comparison.
Are both documents deleted after comparing?
Yes. Both PDFs and the comparison result are deleted from our servers automatically within 2 hours, and none of them is shared.
What differences does the comparison show?
Changed regions are highlighted on every page, and pages that were added or removed between the versions are marked too. Upload the original first and the revised file second.