Text Compare (Diff Checker)

Compare two texts line by line and highlight added and removed lines. Free diff checker for contracts, drafts, code and config files. Private.

🔒 Comparison runs in your browser; your text is never uploaded.

How to compare two documents

Paste the original on the left and the revised version on the right. Removed lines are shown in red with a minus, added lines in green with a plus, and unchanged lines in between, with line numbers from both versions. A changed line appears as one removed and one added line.

Uses at work

  • Check what a counterparty changed in a contract clause.
  • Compare two exports of a list to find new or missing entries.
  • Review edits to policy text, scripts or config files.

Tip: if the texts were re-wrapped, enable Ignore whitespace.

FAQ

Is my text uploaded?

No. The comparison (a longest-common-subsequence algorithm) runs in your browser.

Can I compare Word files?

Copy the text out of each document and paste it here.

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FAQ

Is Text Compare (Diff Checker) safe for confidential files?

Yes. It runs entirely inside your browser, so your files and text are never uploaded to a server.

Is Text Compare (Diff Checker) free?

Yes — free with no sign-up, no daily limits and no watermark.

Does it work on my phone?

Yes. FileMoss tools work in current iPhone and Android browsers as well as on desktop.