Diff Checker
Compare two texts and instantly highlight what changed.
How it works
1
Paste two texts
Enter the original version in the left panel and the revised version in the right panel.
Enter the original version in the left panel and the revised version in the right panel.
2
Compare instantly
A lightweight diff algorithm highlights additions in green, deletions in red and unchanged lines in neutral — all in your browser.
A lightweight diff algorithm highlights additions in green, deletions in red and unchanged lines in neutral — all in your browser.
3
Switch view modes
Toggle between side-by-side and inline unified diff views to match your preference or screen size.
Toggle between side-by-side and inline unified diff views to match your preference or screen size.
4
100% private
No text is ever sent to a server. The comparison runs entirely in your browser — safe for confidential documents and code.
No text is ever sent to a server. The comparison runs entirely in your browser — safe for confidential documents and code.