Diff Checker
Compare two blocks of text line by line. Runs entirely in your browser.
[ ORIGINAL ]
[ CHANGED ]
[ RESULT ]
// waiting for input
About Diff Checker
A line-by-line diff shows which lines differ between two versions of a document — useful for config files, log output, or any text where you need to spot a small change.
How to use it
- Paste the original text on one side.
- Paste the changed text on the other.
- Review the highlighted added and removed lines.
- Adjust either side and the comparison updates.
Frequently asked questions
- Is my text uploaded?
- No. The comparison runs in your browser.
- Does it diff word by word?
- Comparison is line-based. Moving a few words within a line shows the whole line as changed.
- Is there a size limit?
- Very large inputs may be slow because everything runs client-side, but there is no hard cap.