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Text Diff Checker

Compare two blocks of text line by line (LCS algorithm).

Compare two blocks of text and highlight the differences line by line. Handy for comparing two versions of content, configuration files, or code.

How to use Text Diff

  1. Paste the original text and the new text.
  2. See added, removed, and changed lines marked clearly.

Frequently asked questions

Can it compare long files?

Yes, the tool can handle text with thousands of lines.

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🔒 Text Diff Checker runs entirely in your browser — the data you enter is not sent to any server. Free, no sign-up required. See145 free dev tools more.