Enter any site URL and our robots.txt checker fetches its /robots.txt file, then parses every user-agent group, allow/disallow rule, sitemap declaration and syntax issue.
What is a robots.txt checker?
A robots.txt checker is a free tool that loads a site's /robots.txt file and parses it into readable rules. It works as an online robots.txt checker and robots.txt tester tool — paste a URL to check a website's robots.txt in seconds, no signup.
Check any website's robots.txt
Use it as a website robots.txt checker or site robots.txt checker: we request the file at the domain root, list every user-agent group with its allow and disallow rules, and show any Sitemap: declarations. It's the fastest way to check a website for robots.txt and read exactly what crawlers are told.
Validate robots.txt syntax
As a robots.txt syntax checker, it parses each directive (User-agent, Allow, Disallow, Sitemap) and flags structural problems — such as rules that sit outside a user-agent group, or an empty/missing file — so you catch mistakes before they block the wrong pages.
Why robots.txt matters for SEO
robots.txt controls crawling, not indexing. A stray Disallow can hide important pages from Google, while a missing file can let crawlers waste budget on low-value URLs. To keep a page out of the index, use a noindex check instead.
How to use the robots.txt checker
Enter a site URL or domain into the robots.txt checker above.
Click “Check” — we fetch and parse the live robots.txt file.
Review each user-agent group, its rules, and declared sitemaps.
Fix any over-broad Disallow rules or syntax issues, then re-check.
A robots.txt checker is a free tool that fetches a site's /robots.txt file, parses it, and reports every user-agent group, allow/disallow rule, and sitemap declaration — flagging syntax issues. It works as an online robots.txt tester so you can check a website's robots.txt in seconds, no signup.
Enter the site URL (or domain) into the robots.txt checker above and run it. We request the robots.txt file at the root, parse the rules, and show what's allowed and disallowed for each crawler — the quickest way to check a website for robots.txt and read it clearly.
robots.txt is a plain-text file at the root of a domain (example.com/robots.txt) that tells search-engine crawlers which paths they may or may not request. It controls crawling, not indexing — to keep a page out of the index use a noindex tag or X-Robots-Tag header.
Yes. As a robots.txt syntax checker it parses each directive (User-agent, Allow, Disallow, Sitemap) and surfaces structural problems — like rules outside a user-agent group or an empty file — so you can catch mistakes before they block the wrong pages.
A wrong Disallow rule can hide important pages from Google, while a missing or broken robots.txt can let crawlers waste budget on low-value URLs. Checking it regularly — and confirming your sitemap is declared — keeps crawling efficient and your key pages reachable.
Completely free and online, with no account required. It's part of WebsiteAuditTools' free suite of technical SEO checkers.