Check Pro
Text Diff Checker
Compare two blocks of text and highlight the differences.
In-content ad slot — add NEXT ad unit id
How to use this tool
- 1Paste your original text on the left and the changed version on the right.
- 2Click "Compare".
- 3Removed lines show in red, added lines in green.
Frequently asked questions
Does this compare word by word or line by line?
Line by line — it's built for comparing paragraphs, config files, or code blocks rather than catching single-character edits.
Why does a line show as both removed and added?
That happens when a line was edited — the old version is marked removed and the new version marked added, since they're no longer identical.
Can I use this for code?
Yes, though for large codebases a dedicated diff tool in your editor or version control will give more context.