Compare two texts or documents
Drop two versions of a document and see exactly what changed. Word files are read as text, so you can compare two revisions of a contract without a Word licence.
- Runs entirely in your browser
- Works offline
- No upload
- No sign-up
- No watermark
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How it works
- Drop or paste the original and the changed version.
- Choose the granularity: line, word, sentence or character.
- Compare, and export a .patch if you need one.
Why nothing is uploaded
Every operation on this page is done by code running inside your browser tab, using the same engine that renders web pages. The file is read from disk into your tab’s memory, transformed there, and written back out as a download. It is never sent anywhere — not to us, not to a third party.
Verify it yourself
- Open your browser’s developer tools (F12) and select the Network tab.
- Load your file and run the tool.
- The only requests you will see are the tool’s own code and, once cached, none at all.
Frequently asked questions
Can I compare two Word documents?
Yes. Both files are read with Mammoth and compared as text, so wording, order and structure are compared — formatting is not. For a contract revision, that is usually the comparison you actually want.
Which granularity should I use?
Line for code and structured text. Word or sentence for prose, where a line diff marks a whole paragraph as changed because of one word. Character is for tracking down an invisible difference such as a non-breaking space.
Are my documents uploaded?
No — and this is a tool where that matters: comparing two versions of a contract on a random website means handing over both. Here the comparison runs in the tab.