Is Compare Two PDFs free?

Yes. Use Compare Two PDFs free on TheToolss — no signup required.

No. Processing runs locally in your browser whenever possible.

Can I use it on mobile?

Yes. Open the tool in a mobile browser.

What size limits apply?

Follow the upload limit shown in the tool (typically around 50 MB for PDFs).

Compare Two PDFs

Compare text extracted from two PDFs.

100% free
Private in browser
No signup
No watermarks

PDF ATap to choose a filefirst document

PDF BTap to choose a filesecond document

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About Compare Two PDFs

Checking if two PDF versions match? Compare Two PDFs on TheToolss extracts selectable text with pdf.js and diffs pages line by line. The result marks added, removed, and changed lines per page, so you can jump straight to the sections that moved instead of re-reading both documents end to end. Contract redlines, spec revisions, and updated report decks are the common cases. Everything runs in your browser, free and private. Scanned image-only PDFs hold no selectable text, so run OCR first — that step is not included here.

How to use Compare Two PDFs

Upload PDF A and PDF B.
Run the comparison.
Review page-level diff summary and previews.

Key features

Page-by-page text extract + diff
Added/removed/changed counts
Works offline after load
Highlights mismatched pages
Private browser comparison

Frequently asked questions

Is Compare Two PDFs free?: Yes. Use Compare Two PDFs free on TheToolss — no signup required.
Is my PDF uploaded?: No. Processing runs locally in your browser whenever possible.
Can I use it on mobile?: Yes. Open the tool in a mobile browser.
Do I need an account?: No account is required.
What size limits apply?: Follow the upload limit shown in the tool (typically around 50 MB for PDFs).