Compare two blocks of text line by line, or word by word inside a changed line.
This runs entirely in your browser. Nothing you paste, type or drop here is sent anywhere — there is no server on the other end of it.
Paste two versions of anything and see what changed — line by line, with the changed words picked out inside each changed line. Useful when the two things are not in git: a config that drifted between environments, two API responses, a prompt you edited and want to see the shape of.
No. The comparison runs in your browser and nothing is transmitted, which is what makes it reasonable to paste a config or an API response containing things you would not put into a hosted diff tool.
This one takes pasted text. For files already under version control, git diff is better at it and knows the history; this is for the cases where the two versions are not in a repository at all.
Invisible characters — a trailing space, a tab where the other side has spaces, or Windows CRLF line endings against Unix LF. Turn on ignore-whitespace and if the difference disappears, that was it.
Yes. Very large inputs are capped so the page stays responsive, since a full line diff grows with the product of both lengths. For anything approaching that size, a real diff tool on your own machine is the better answer.