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Compare Two PDFs — Free Online Tool
Upload two PDFs and see what changed. Text is extracted page-by-page and shown side-by-side with additions and deletions highlighted.
Drop two PDFs above and press Compare PDFs — the text diff appears here, page by page.
Text comparison, page by page
No sign-up needed
Free forever
How it works
1Drop two PDFs — A (original) and B (the new version).
2Press Compare PDFs — text is extracted from every page of both files.
3Flip through the pages and read the highlighted side-by-side text diff.
Frequently asked questions
Is this a pixel-by-pixel visual comparison?
No — this is a text comparison. The tool extracts the text content of each page and highlights added/removed lines. Layout, fonts, colors and images are not compared.
What if the two PDFs have different page counts?
Pages that exist in only one PDF are shown in full, labeled "Only in A" or "Only in B", so nothing is silently skipped.
Why does the diff look odd on a scanned PDF?
Scanned pages are images, not text — there is nothing to extract, so those pages show no text lines. This tool cannot read text from scanned images.
Text extraction via PDF.js · line diff computed locally · 100% local — your PDFs never leave this page.