Text Diff Checker

Paste two versions of a text and see exactly what changed, line by line: additions highlighted in green, removals in red, with a running total of added and removed lines. The comparison uses a longest-common-subsequence diff, the same core technique version-control tools use.

Use it to review edits to a document, spot what changed between two config files, or compare API responses. All comparison happens locally in your browser — nothing is uploaded.