SEO Tools

SEO Robots.txt Checker

Check a site's robots.txt file and its sitemap reference, from an SEO perspective.

Not sure what to enter? Try an example: wikipedia.org

Free & instant No signup How to use FAQ

Enter a URL to check its robots.txt file, sitemap reference, and crawl rules.

How does robots.txt affect SEO?

robots.txt controls what search engines may crawl. A single misplaced Disallow: / can hide an entire site from Google, while a Sitemap: line helps crawlers find your pages. This checker reviews the file from an SEO point of view, including whether it references a sitemap.

How to check robots.txt for SEO

Enter the domain in the box above.
Click Check robots.txt.
Make sure important pages, CSS and JavaScript are not disallowed.
Add a Sitemap: line with your sitemap's full URL if it is missing.

Related checks

Check the sitemap it points to with the XML Sitemap Checker.
To check a single page, use the Indexability Checker.

Use robots.txt to keep crawlers away from admin areas and endless filter URLs, never to hide pages you want removed from Google - use noindex for that. JustChecker checks the file regularly so a bad edit is caught quickly.

Frequently Asked Questions

They examine the same file - this version is framed specifically around SEO implications (crawl budget, sitemap discovery, unintentionally blocked important pages) rather than a purely technical presence/content check.

Yes, significantly - an overly broad Disallow rule left over from staging/development, or a rule accidentally blocking a critical section of your site, can prevent search engines from crawling and indexing important content entirely.

Yes - strategically disallowing low-value pages (admin areas, duplicate filtered/sorted views) helps focus a search engine's limited crawl budget on the pages that actually matter for ranking, especially valuable for large sites.

No - the sitemap should be openly crawlable and ideally explicitly referenced in robots.txt via a "Sitemap:" line, since blocking it would defeat its entire purpose of helping search engines discover your pages.

No - it only controls crawling behavior; it has no bearing on content quality, on-page optimization, or the many other ranking factors search engines evaluate once a page is actually crawled and indexed.

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