llms.txt Checker
Enter a site: the tool fetches /llms.txt (and looks for /llms-full.txt), checks its format against the llmstxt.org proposal and tests a sample of the linked pages.
Privacy and cost
This tool runs a live check on our servers. Free accounts get 3 live checks per day in total across all such tools. We keep your report in your account so you can delete it any time.
How it works
- We fetch /llms.txt and /llms-full.txt (two requests).
- The Markdown is parsed: one H1, a blockquote summary, H2 sections holding "[title](url): note" lists and an optional Optional section.
- Up to 10 links are tested with HEAD (GET fallback) to confirm they answer 200.
Example
A file that starts with "# Acme Docs", followed by a blockquote summary and a "## Docs" section with two absolute links, passes the format checks; a relative link is flagged.
What the result means
llms.txt is a community proposal, not a standard, and no major engine has confirmed using it to rank or cite pages. The tool only checks the file's conformance to the proposal and the state of its links, with no promise of an effect on visibility.
Common problems this tool helps with
- A /llms.txt URL that returns an HTML page (soft 404) instead of Markdown.
- Relative or broken links in the file.
- A file with no H1 or summary.
- A list that does not use the [title](url) format.
Frequently asked questions
Does llms.txt improve my ranking?
No demonstrated effect. It is an open proposal to help models find the essentials of a site; Google has said it does not use it for Search.
What is llms-full.txt for?
It is a proposed variant that gathers the full content in one file. The tool only notes its presence.
Why only 10 links tested?
To finish within one request of under 25 seconds, the tool tests a capped sample and states how many links were not verified.
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