Text Diff Checker
Compare two texts and highlight the differences.
Paste text in both boxes to see the differences.
About the Text Diff Checker
Compare two texts free and see every difference highlighted — added lines in green, removed lines in red, unchanged lines dimmed. Paste the original on the left and the revised version on the right to instantly spot what changed between contract drafts, config files, articles, or code snippets. The comparison runs locally in your browser, so sensitive documents stay private.
How to use the Text Diff Checker
- 1Paste the original text on the left.
- 2Paste the changed text on the right.
- 3Review added (green) and removed (red) lines.
Frequently asked questions
What kind of diff is this?
A line-by-line diff that highlights added and removed lines between the two versions.
Is there a size limit?
For performance it handles up to roughly 4000 total lines in the browser.
Can I compare two Word documents?
Yes — copy the text out of each document and paste them into the two panes. For tracked-changes workflows, Word's built-in Compare is better.