Text Diff

Compare two texts and find differences. Highlight added, removed, and unchanged lines. Free online text comparison tool.

Free text diff tool. Compare two texts side-by-side. Highlights additions, deletions, and unchanged lines. Instant comparison.

  • Side-by-side text comparison
  • Color-coded additions and deletions
  • Line-by-line difference highlighting
  • Summary of changed/unchanged lines
  • 100% client-side - text stays private

How to Compare Text Differences

  1. 1 Paste the original text in the left input area
  2. 2 Paste the modified text in the right input area
  3. 3 Click 'Compare' to analyze the differences
  4. 4 View highlighted additions, removals, and unchanged lines
  5. 5 Use the summary to see counts of changed lines

Frequently Asked Questions

Is my code or data stored anywhere?

No. All developer tools process data locally in your browser. Nothing is sent to any server or logged.

Can I use these tools offline?

Yes! After the initial page load, most developer tools work without an internet connection.

Are there API limits?

No limits. Since processing happens in your browser, you can use the tools as much as you need.

Is the output compatible with production use?

Yes. Our tools produce standard-compliant output suitable for production environments.

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Last updated: January 15, 2026 · v2.1