Compare two blocks of text or code line by line and see exactly what was added and removed. Runs entirely in your browser.

The Diff / Text Compare tool compares two blocks of text or code line by line and highlights exactly what was added and removed. It uses a longest-common-subsequence diff, the same approach as version-control tools, and runs entirely in your browser.
It compares the two inputs line by line using a longest-common-subsequence algorithm, then marks each line as unchanged, added or removed.
No. The comparison runs entirely in your browser; nothing is sent anywhere.