Free PDF tool

Compare Two PDFs and See What Changed

Choose an older and a newer version of a document and see, word by word, what was added or removed.

Use the Compare PDF tool

Free, no sign-up, nothing uploaded

Your file stays in your browser tab. We never see it.
No account, no watermark and no limit on files.
Works on phones as well as laptops.

What the Compare PDF tool does

After feedback, you redraft. After more feedback, you redraft again, and soon it is unclear what changed between versions. Comparing two files shows exactly which words were added and which were taken out.

The tool compares the words rather than the page layout, so a changed margin does not drown out real edits.

How to use it in four steps

Open the Compare tool and choose your two PDFs.
Pick which is the older version and which is the newer.
Press Compare.
Read the highlighted additions and removals.

How students use it

Check what you changed after your supervisor's feedback.
Confirm that a final version contains every edit you meant to make.
Compare a draft with the version you submitted.
Review changes between two versions of a group report.

Good to know

It works on typed PDFs. Scans have no text to compare.
Very long documents are compared by trimming what both files share first, so the tab stays responsive.

Need more than a tool?

These tools handle your files, not the work inside them. If you want feedback on a draft, TutorSuite offers proofreading and editing. You can also see the rest of our PDF tools and other free study tools.