Text Diff Checker
Free online text diff tool. Paste two versions and compare them line by line: additions are green, removals are red and unchanged lines are grey. Great for comparing drafts, code versions, lists and configs — the comparison runs entirely in your browser. ProductivityRuns locally
Use this tool
How to use
- Paste the original text in A and the revised text in B.
- Click “Compare”.
- Green lines were added in B, red lines removed from A, grey lines are unchanged, with a summary count.
Frequently asked questions
Is it character- or line-based?
It compares line by line, which suits articles, lists, code and configuration best.
Is the text uploaded?
No — both texts are compared only in your browser.
How large can the text be?
Up to about 1000 lines per side is recommended for smooth performance, which covers ordinary documents and code.