Check a website's llms.txt
Type a website. We read /llms.txt and /llms-full.txt and check the structure against the llmstxt.org format: the H1, the summary, the link sections and each link. Problems are listed with how to fix them. Free, no account.
Example: a sample page we wrote for this demo (smithplumbing.example is not a real site). Type any website above for a live check.
smithplumbing.example: llms.txt
smithplumbing.example: llms.txt is readable, with 1 warning.
- Pass: H1 title. Smith Plumbing
- Pass: Summary blockquote. Family-run plumbing company serving Springfield.
- Pass: Section "Services". 2 links.
- Pass: Section "Optional". 1 link.
- Warning: A link is not a full URL. /blog: use the whole address so it works away from your site.
- Note: Optional section. In the format, links under Optional may be skipped when space is short.
This checks structure only. It does not open the links or judge the content. llms.txt is a community proposal; no AI company has promised to use it, so a valid file is not a promise of citations.
Format reference: llmstxt.org.
What the checker looks for
- The file exists at
/llms.txtand is text, not an HTML page. Sites that answer every unknown address with a web page are caught. - An H1 on the first line with the name of the site.
- A summary in a
>blockquote straight after it. - H2 sections of links, each item written
- [name](url): notes, with full addresses and no repeats. - llms-full.txt, the optional single-file version, is read too.
We read the files once, with the same address guard as our other site tools, and open none of the links inside them.
Find the businesses to sell to
Spot sites with no llms.txt and offer to write one. Search 67Leads by trade and city, or start with businesses with no website and businesses with an owner email.
Get 67 leads free No card. Search free with contacts masked.
llms.txt generatorAI crawler checkerSchema markup checkerWebsite audit reportAll lead lists67Leads pricing
Questions
A proposed plain Markdown file at /llms.txt that gives language models a short guide to a site: its name, a summary and links to the pages that matter. The format is described at llmstxt.org.
No one can promise that. It is a proposal and AI companies have not committed to reading it. It is cheap to add and does no harm, so it is reasonable to have.
An optional companion file that holds the full text of the key pages in one place, for tools that prefer one file.
The format requires only an H1 title. The checker also flags a missing summary, empty sections, list items that are not links and links that are not full addresses, because those are the usual mistakes.
No. The page is read when you ask and the result is written to the page, not saved.
No. Every address is resolved first and refused if it points at a private, loopback, link-local or reserved network, and every redirect is checked the same way.
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