Compare PDF
Compare two versions of a PDF page by page and get a visual report with the changed areas highlighted. It catches silent edits that a text diff misses, including moved images and altered figures. It is free, needs no account, and adds no watermark to your result.
Compare PDF
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What people use it for.
What happens to your file.
Both documents are rendered page by page and compared visually. Each page of the report shows version A, version B and the differences highlighted in red, with the share of changed pixels and a text-similarity score, so layout and image changes are visible and not just text. Where the text of a page changed, a line-by-line text difference follows it.
Where it stops: This is a visual comparison, so a change in an invisible property such as metadata will not appear. Pages that shift position can flag a whole page as changed.
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Common questions.
Why is a visual comparison better than a text diff?
A text diff misses anything that is not text: a swapped figure, a moved signature block, an altered chart or a changed layout. Visual comparison catches all of those.
Why is an entire page marked as changed?
If content reflowed or shifted, every element after that point moves, so the whole page differs visually. Compare the highlighted regions to see what actually moved.
Do the documents need the same page count?
They compare best when they do. Pages are matched by number, so an extra page in one file is compared against a blank page and shows as entirely changed.
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