Please send bug reports, feature suggestions, and translation corrections to the email address below. Every message is read, but replies may take some time.
If a comparison result looks wrong, telling us what input you used and what result you expected helps a great deal in finding the cause.
Helpful details to include
- Browser and device (e.g. Chrome 130 on Windows 11, Safari on iPhone)
- Options you had turned on (whitespace, case, blank lines, line endings, JSON, in-line diff unit)
- A short sample text that reproduces the problem — remove or replace anything sensitive
- The result you expected and the result you got
This site does not collect your input, so the operator has no way to see the text you compared. If an example is needed, please paste it directly into your email.