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Text · 100% browser-side

Diff Checker

Spot every change between two versions of a text instantly.

Free foreverNo uploadsNo account
Original text
Changed text
Suggested next steps

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Your privacy matters

All files are processed locally in your browser. Nothing is uploaded to our servers, so your documents remain private and secure.

01 · Real-world fits

Common use cases

  • Comparing two versions of a contract or policy document
  • Reviewing edits between drafts of an article or essay
  • Checking what changed between two config files or code snippets
  • Verifying that a copy-paste preserved the original text
  • Auditing changes a colleague (or an AI) made to your writing
02 · The honest pitch

Why Diff Checker?

Reworded lines are paired up and diffed word-by-word, so an edited sentence shows exactly which words changed instead of appearing as an unrelated deletion and insertion. Everything runs locally — paste confidential contracts without them leaving your machine.

Diff Checker keeps the job narrow: spot every change between two versions of a text instantly. It is built for the small but frequent moments when opening a heavyweight editor, installing a package, or uploading sensitive work to a random service is more friction than the task deserves.

03 · Edge cases

Frequently asked questions

No. The comparison runs entirely in your browser using the Myers diff algorithm — nothing is sent to a server.