Free Online Robots.txt Diff Checker
Use this browser-based SEO checker to review pasted code, files, or URL lists before publishing changes. The tool runs locally in your browser and gives you a copyable report for QA, SEO, and launch workflows.
Robots.txt Diff Checker
Compare two robots.txt versions, highlight added and removed crawl rules, and flag risky new Disallow, Sitemap, and crawl-delay changes.
Paste the current robots.txt on the left and the proposed version on the right.
Optional. Loads into the current version box.
Optional. Loads into the proposed version box.
Paste both versions, then compare.