llms.txt validator

Enter a domain to check for /llms.txt and /llms-full.txt, including file size, whether a top-level Markdown heading is present, and linked resources. A missing file is informational, not critical.

What this checks

Retrieves /llms.txt and, if present, /llms-full.txt.
Checks file size and whether a top-level Markdown heading is present.
Lists the linked resources the file points to.

What this does not check

llms.txt is an independent community proposal, not an IETF or W3C standard — no AI system is known to require or guarantee use of it. A missing file is treated as informational, not as a fault. See limitations.

How to publish an llms.txt file
Why an llms.txt file isn't validating

Want the complete picture?

This checker is a view into a full CrawlPact audit, which also covers robots.txt, RSL, Content Signals, and your Policy Health Score.

Run the full audit

llms.txt validator

What this checks

What this does not check

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