A text diff tool lets you compare two pieces of text and immediately see what has changed between them. Whether you are reviewing edits to an article, verifying changes in a configuration file, or comparing two versions of a legal document, this tool highlights every addition and removal so nothing slips through unnoticed.
This free text diff tool uses a line-by-line comparison powered by the Longest Common Subsequence (LCS) algorithm. Lines present only in the modified text are shown in green as additions, while lines present only in the original are shown in red as removals. Unchanged lines are displayed in their normal color for context. The result is a clear, easy-to-read summary of every difference between the two texts.
All comparison happens in your browser. Neither text is transmitted to a server, making this text diff tool safe for sensitive content like contracts, source code, and private communications. There are no file size limits, no account requirements, and no watermarks on the output.