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Robots.txt Validator

Validate robots.txt syntax and test URL paths against its rules for any user-agent. A free robots.txt checker, no sign-up.

How It Works

1

Paste your robots.txt

Paste the contents of your robots.txt file into the editor. A sample is pre-loaded to get started.

2

Review validation results

The tool checks syntax, groups rules by User-agent, and flags errors and warnings.

3

Test specific URLs

Enter a user-agent name and URL path to check whether that path would be allowed or blocked.

FAQ

User-agent, Allow, Disallow, Sitemap, Crawl-delay, and Host. Unknown directives trigger a warning.
Patterns support * (wildcard) and $ (end anchor) per the robots.txt specification. The most specific matching rule wins — longer patterns take priority.
Yes. 'Disallow: /' blocks all paths for the specified user-agent. To allow everything, use 'Allow: /' or leave Disallow empty.
No. All parsing and validation runs in your browser. To validate your site's Open Graph tags, try the OG Tag Validator.

Built & Maintained by Varstatt

Varstatt is a one-person product studio run by Jurij Tokarski, product engineer since 2011. These tools are free and open — no signup, no catch.