Type or paste into either box and the differences highlight live, directly in the editor — no Compare button needed. Removed lines shade red on the left, added lines shade green on the right. Since both sides stay fully editable, the two panes highlight their own lines independently and may not always land on the same row when lines are inserted or deleted.
All tools/Text Tools
Text Diff Checker
Compare two blocks of text or code live — differences highlight directly in the editor as you type.
Original
1
Changed
1
+0
-0
How this works & FAQ
Does this diff word-by-word?
No, it compares line by line — a single changed word will mark the whole line as removed on the left and added on the right.
Can I compare code, not just plain text?
Yes — it works on any line-based text, including source code, config files, JSON, or logs.