Paste two texts and see every added, removed and changed line — side by side or unified, with the changed characters highlighted inside changed lines. Toggle trailing-whitespace and case sensitivity, and copy a unified diff.
Privacy ledger
Data acquired
None.
Libraries used
Lit 3 — bundled into the tool file itself.
Data stored
None.
Data transmitted
None.
Use it on your own page
Download the tool as a single self-contained HTML file: readable source with the Lit library included, zero network requests — it works opened straight from your disk, and you can customize everything.