Text Diff Checker
Compare two texts and highlight the differences line by line.
Compare two blocks of text and instantly see what changed — added and removed lines are highlighted. Everything runs in your browser, so your text stays private.
Runs entirely in your browser — nothing is uploaded.
How to use the text diff checker
- 1Paste the original text on the left.
- 2Paste the changed text on the right.
- 3Review the highlighted line-by-line differences.
Frequently asked questions
Does it compare line by line or word by word?
Line by line — each line is marked as unchanged, added, or removed.
Is my text private?
Yes — the comparison runs entirely in your browser and nothing is uploaded.