Text Diff Checker

Compare two texts line-by-line and highlight the differences.

Original

Changed

How it works

It compares line by line; a change within a line marks the whole line as changed rather than the exact characters.
Very large inputs are compared locally, so they are bounded by your device's memory.

Line by line. Added and removed lines are highlighted. A small edit flags the whole line as changed, which is the standard diff view.

Yes, within your device's memory: comparison runs locally, so there's no upload limit, just a practical RAM ceiling.

No. The comparison runs entirely in your browser, so confidential documents stay private.