Open two PDFs
Drop the original PDF on the left and the new version on the right.
WAVESPEED AI COMPARE PDF Files stay on your device
100% FREE
Compare PDF FilesFind every difference between two PDFs.
Open two versions of a PDF and see what changed, word by word, side by side and highlighted on the original pages.
Running headers and page numbers are left out, so only real changes show.
Highlights on the pagesRedline PDF reportNo upload
No sign-up No upload No watermark
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Your documents are read and compared in your browser. They are never uploaded.
THREE SIMPLE STEPS
How to use the Compare PDF
See the differences
Changes are highlighted in the text and on the PDF pages. Step through them with N and P.
Save the report
Download a PDF comparison report with the redline and a numbered list of changes.
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Compare PDF FAQ
Is it free to compare PDFs here?
Yes. No account, no limit on pages or files, and no watermark on the report.
Are my PDFs uploaded?
No. Both PDFs are read and compared in your browser and never leave your device.
Can I see the changes on the PDF pages?
Yes. The Pages view shows the original pages of both PDFs with the changed words highlighted where they are.
Does it work with scanned PDFs?
Only if they have a text layer. A scan without one is a picture: make it searchable with the free OCR tool, then compare.
Does it compare formatting?
No, it compares the text. Changes in fonts, colours, pictures or layout are not reported.
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Compare PDF Files
Highlights on the pages · Redline PDF report · No upload