Text Diff Checker

Compare two texts online and see exactly what changed. Highlights added and removed lines, words or characters, with a side-by-side view and options to ignore case.

  • Free, no sign-up
  • Runs in your browser
  • Your data stays private

How to use the Text Diff Checker

  1. Paste the original text on the left and the changed text on the right.
  2. Choose to compare by lines, words or characters, and set options such as ignore case.
  3. Review the highlighted changes, the side-by-side view and the similarity score.

Why use this Text Diff Checker

  • Three comparison levelsLines for documents and code, words for prose, characters for tiny edits.
  • Side-by-side and inlineSee a unified view with word-level highlights or two aligned columns.
  • Forgiving optionsIgnore case, extra spaces or blank lines so only real changes show.
  • Similarity scoreCounts added, removed and unchanged items with an overall percentage.

Frequently asked questions

How do I compare two texts?

Paste one version in each box and press Compare. Added text is green and removed text is red.

Can it compare code or JSON files?

Yes. Any plain text works. For JSON, the JSON Diff tool also understands structure and ignores key order.

Is my text uploaded?

No. The comparison runs entirely in your browser.

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