Text Compare
Find differences between two texts. Line-by-line diff with highlighted changes.
Original Text
Changed Text
Your text never leaves your browser. Nothing is uploaded to our servers.
How It Works
1
Paste
Paste your original text on the left and the modified version on the right.
2
Compare
Click Compare to see a line-by-line diff with word-level highlighting of changes.
3
Review
Green = added lines. Red = removed lines. Changed words are highlighted inline.
Use Cases
- Code review — Compare two versions of code to see what changed
- Document editing — Track changes between drafts of articles, essays, or contracts
- Configuration files — Compare server configs, .env files, or YAML before deploying
- Translation — Compare original and translated text side by side
- Debugging — Find subtle differences in log output, API responses, or data dumps
FAQ
No. All comparison happens entirely in your browser using JavaScript. Your text never leaves your device.
The tool uses the Longest Common Subsequence (LCS) algorithm for line-level diff, then applies word-level diffing within changed lines for precise highlighting.
Since everything runs in your browser, the limit depends on your device. Most modern devices can handle texts up to 50,000+ lines without issues.