Text compare
Paste two texts and see what changed, line by line, with the changed words marked inside each line. Works as a diff checker for code, config, logs and prose.
Everything runs in your browser. Nothing you paste is sent anywhere or saved: this page is served with a Content Security Policy that stops it from opening connections (connect-src 'none'), and it has no analytics or ads. Open your browser's Network tab to check that no request carries what you paste.
How to use
Paste or drop the original on the left and the changed text on the right, then press Compare. Line endings are normalised, so a file saved on Windows compares cleanly with one saved on a Mac. Use n and p to move between changes.