Free, runs entirely in your browser — no sign-up, no file upload to a server.
What does Text Diff do?
It compares two blocks of text and highlights the differences between them, line by line.
How do I use it?
Paste the original text on one side and the changed text on the other — differences are highlighted automatically.
Is there a limit on how much text I can enter?
No hard limit is enforced — very large blocks of text just take a little longer to process, since everything runs in your browser.
Is my text sent anywhere?
Everything runs in your browser — nothing you type or paste is sent to a server.
How do I report a problem or request a feature for this tool?
Use the Contact / Feedback page — select "Text Diff" as the related tool so we know exactly which tool you mean, then describe the bug or the feature you'd like to see.