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llms.txt validator

Does your llms.txt follow the format?

We request your /llms.txt and /llms-full.txt, check the format proposed at llmstxt.org and show you how a tool would read it. No promises: its effect on AI answers is not proven.

We request your site's public files from our server, the way a crawler would. We store neither the domain nor the result.

How it works

What the tool does, step by step

  1. Step 1

    We request both files

    From our server we request /llms.txt and /llms-full.txt at the root of your domain, with up to three redirects.

  2. Step 2

    We check the format

    A required H1 title, an optional blockquote summary, text without headings and H2 sections with Markdown link lists.

  3. Step 3

    We show you the result

    You see each problem with its line, the structure as a tool reads it and, if you have no file, a template to start from.

Scope

What it checks and what it cannot tell you

What it checks

  • That /llms.txt exists, is served as text and is not an HTML error page.
  • The H1 title, the summary, the H2 sections and every link in the lists.
  • Badly written links, relative or non-https addresses, and empty sections.
  • Whether you also publish /llms-full.txt.

What it cannot tell you

  • Whether any AI reads your file. It is not a standard adopted by search engines, and Google says its AI features need no special file.
  • Whether the links work. We check how they are written, we do not visit each one.
  • Whether the content is true or matches your site. An llms.txt promising what your pages do not say is another kind of inconsistency.
Questions

Frequently asked questions

What people usually ask before and after using the tool.

Can't find your question? Write to us

  • It is not a requirement. Google says its AI features need no special file, and there is no public evidence that llms.txt changes answers. It can help tools that read it.

  • llms.txt is a short index with links to your important pages. llms-full.txt is a convention some sites use to publish their full content in one file. Neither replaces a crawlable website.

  • No. Under the proposal only the H1 title is required. The summary helps understand the site at a glance, which is why we flag it as a note.

  • What your site already says, in short: who you are, what you offer and links to the pages that answer (pricing, services, FAQ). We give you a template if you have no file.

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  • Measured for Spain, in Spanish
  • Every figure with its answer and its source
  • Nothing is published without your approval