Upload two versions of a PDF and get a plain-language summary of what changed.
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✨ AI: AI diff summary — sign in to use
Sign in- Explains changes in plain language, not just line-by-line diffs
- Upload the original and the revised PDF
- Sign in to use — connect your own API key
How it works
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Sign in with credits or a connected API key.
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Upload the original PDF, then the revised one.
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Run the comparison.
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Read the list of changes and check the key passages.
About the PDF Changes Summary (AI)
A line-by-line diff tells you which lines changed, but not what the changes mean. Upload an original and a revised PDF and this tool asks an AI model to read both and list, in short bullet points, what was added, removed or reworded in a way that affects meaning. Page numbers, spacing and other purely cosmetic differences are ignored.
What you can do
- Upload two PDFs of up to 25 MB each: the original first, the revised version second.
- Get a bulleted list of meaningful changes, including additions, removals and rewordings.
- Catch changes that a text diff hides, such as a sentence moved to another section or a reworded obligation.
- Check the estimated credit cost before you run it.
When it works best
- Reviewing a revised contract, lease or employment agreement before signing.
- Explaining to a team what changed between two versions of a policy or specification.
- Comparing two quotes or proposals that cover the same work.
Things to know
- Signing in with a verified email is required, and runs use credits or your own Anthropic or Google API key.
- Both documents are sent to the AI provider you choose.
- A summary can leave out small edits. For an exhaustive line-by-line view that runs in your browser and needs no account, use Compare PDF.
- Treat the summary as a guide to where to look, then read the changed passages yourself before relying on them.
Frequently asked questions
The original goes in the first slot and the revised version in the second, so additions and removals are reported the right way round.
No. Spacing, page numbers and similar layout differences are ignored; the bullets cover additions, removals and rewordings that change meaning.
When you need every edited line. Compare PDF runs in your browser without an account and misses nothing in the text, while this summary may skip minor edits.
A verified, signed-in account and credits or an Anthropic or Google API key. Both PDFs, up to 25 MB each, are sent to the chosen provider.