Compare two PDFs, see what changed

Word-by-word comparison of two versions, page by page. Both files stay on your device.

Drop two PDFs here

The original first, then the revised version. Text is compared, not pixels.

Nothing is uploaded. Both files are read on your device. Up to 50 MB.

How comparison works

Step 1

Add both versions

Original first, revision second. Order matters: it decides what counts as added and what counts as removed.

Step 2

Compare

Every page is compared word by word. Pages that did not change are collapsed so only the differences remain.

Step 3

Read the changes

Removals struck through, additions underlined, each with its page number.

What it handles

Word-level, not pixel-level

01

Reflow does not count as change

Insert one word and a pixel comparison flags every line after it. Comparing words reports only what a reader would call a change.

02

Page counts

A page added or removed is reported as such, rather than shifting everything after it into a wall of false differences.

03

Whitespace ignored

Different spacing or line breaks between versions are not differences. Only the words are.

04

Honest about big edits

Where a page is rewritten wholesale, it says the block was replaced instead of inventing a precise word-by-word story.

Questions

Does it compare formatting or images?

No. Text only. Font, color, spacing and image changes are not detected. For contracts and policies the words are what matter; for design proofs this is the wrong tool.

Does it work on scans?

Not directly. A scan has no text layer, so there is nothing to compare. Run it through the searchable-PDF tool first, then compare.

Can I export the result?

Not yet. The comparison is shown on screen. Print the page from your browser if you need a copy.

What if the pages do not line up?

Pages are compared in order. If a page was inserted near the front, everything after it will appear changed. The tool reports the page count difference so you can see why.