Text Diff Checker
Compare two texts line by line and see exactly what changed.
Line-by-line comparison, the way diff and git diff do it. Nothing is uploaded — the comparison happens in your browser.
How to use the Text Diff Checker tool
- Enter your diff in the fields above.
- Adjust any slider or type an exact number — the answer updates as you go.
- Copy the result and close the tab. Nothing you entered was sent anywhere.
About the Text Diff Checker tool
Paste the original and the changed version and the tool shows a line-by-line difference in the same style as git diff — added lines prefixed with a plus, removed lines with a minus, and changed lines shown as both.
The comparison uses a longest common subsequence, so a moved or reworded block is reported as a real change rather than a cascade of false edits. Toggles let you ignore whitespace or letter case when that is all that changed.
Everything runs locally in your browser: no data is uploaded, no account is needed, and it works offline once the page has loaded.
Embed this tool
Customize and copy an iframe. Linking back helps both sites.