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 Paste the original text in the left input area
- 2 Paste the modified text in the right input area
- 3 Click 'Compare' to analyze the differences
- 4 View highlighted additions, removals, and unchanged lines
- 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