Text Compare (Diff Checker)
Compare two texts side by side with additions and deletions highlighted.
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About this tool
Paste two versions of anything — article drafts, meta tag sets, robots.txt files, code — and see exactly what changed, line by line, with additions in green and deletions in red. All processing is local, safe for confidential text.
How to use the Text Compare (Diff Checker)
- Paste the original in the left box, the new version in the right.
- Click Compare.
- Review highlighted changes and the change summary.
Frequently asked questions
What do SEOs diff most?
Before/after page HTML during ranking drops, robots.txt changes, and competitor page revisions over time.
Is there a size limit?
It comfortably handles tens of thousands of lines in-browser.