Text compare

Paste. Compare. Done.

See exactly what changed between two versions. Nothing leaves your browser.

Original
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Comparison results Text
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These texts are identical
No differences found. Every word, space, and punctuation mark matches perfectly.
Explain these changes in plain English
Pro summarises what changed and why it matters. "The appointment moved from March 15 to April 3, medical records are now required, and the office has relocated to Federal Street."
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How does text comparison work?

ChangeChecks lets you compare text online for free, with no account and nothing to install. Paste two versions of any text — a contract, a draft, a letter, a piece of marketing copy — and see every word that changed at a glance. The merged view reads like Track Changes in Word: removed text in coral, added text in green, with numbered markers so you can step through each change one by one.

Everything happens in your browser. We never send your text to a server, and there is no log of what you compared. That makes ChangeChecks safe for sensitive material — confidential drafts, NDA'd documents, internal copy — without the friction of a self-hosted tool. The summary bar tells you up front how much changed, how similar the texts still are, and where the changes are concentrated, so you don't have to scroll to find out whether anything important moved.

If you need to compare two text files online for a quick edit review, audit a contract revision, or check whether someone changed a paragraph you were not expecting them to, the workflow is the same: paste, compare, scan the summary, jump to each change. No signup, no upload, no waiting.

Frequently asked questions

Is my text private?

Yes, completely. ChangeChecks runs entirely in your browser; your text never leaves your device. There is no server storage and no log of what you compared.

Do I need to sign up?

No. Every tool is free and works without an account.

What is the maximum text length?

5 MB per pane. Pasted content above that is truncated with a notice; most browsers handle hundreds of pages comfortably below the cap.

Can I compare more than two texts at once?

Not in a single view. For multi-version comparisons, run pairwise checks against the canonical version.

Does it work offline?

Yes, once the page is loaded. The diff engine runs locally without any network requests.

Learn more

How to compare two text files online
Step-by-step guide: paste, scan the summary, jump through changes.
For writers and editors
Track every edit between drafts without wading through Track Changes.
For freelancers
Check what your client changed in the contract before you sign.