Compare PDF
Compare PDF - Find what changed between two PDF files, word by word. Side-by-side view, overlay, and a change list. Free, no sign-up, files never leave your browser.
Upload 2 PDFs to compare
Up to 100MB per file · Files never leave your browser
Drop 2 files at once and they fill the slots in order
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Frequently Asked Questions
Are my files uploaded to a server?
No. The entire comparison runs inside your browser, so files are never sent to a server. Sensitive documents like contracts stay on your device.
Can I compare scanned PDFs?
Word-level comparison needs PDFs that contain text. Scanned PDFs automatically switch to Overlay mode, and turning on tinting colors the differences.
What kind of differences are detected?
Added, deleted, and changed text is found word by word - red on the original, green on the revised file. Layout or image changes can be checked in Overlay mode.
Can I compare files with different page counts?
Yes. Pages that exist on only one side are shown as missing, and because differences are computed across the whole document, content pushed to later pages is still matched correctly.
Is there a file size limit?
Up to 100MB per file. There is no page limit, but larger files take longer to read.
Which file formats are supported?
PDF is supported. Up to 100MB per file and 2 files at a time. Everything runs in your browser, so files are never uploaded to a server.
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