An open proposal (llmstxt.org) for sites to give language models a Markdown summary: who you are, what you do and which links to read. It's to an AI what a table of contents is to a book.

Do ChatGPT, Claude or Gemini read it?

It isn't an official standard and no major company has promised to always read it. It's mostly used by coding assistants and some agents when they visit a site. It takes a minute, does no harm and makes you decide which pages matter, which is useful on its own.

Does it replace robots.txt or the sitemap?

No. robots.txt says who can come in, the sitemap lists every page and llms.txt explains which ones matter and why. Ideally you have all three.

What goes in the “Optional” section?

What an AI can skip if it's short on space: the old blog, press releases, secondary docs. The format reserves that name exactly for this.

Tools

Your llms.txt,
in a minute

llms.txt is a text file at the root of your site that tells an AI, in a few lines, what you are and which pages to read first. Enter your site, we fill it in with what we find, and you polish it.

Site or business nameOne-sentence summaryMore context (optional)

Pages

Section title

Your llms.txt

llms.txt

# …

Upload it to the root of your site, so it opens at yourdomain.com/llms.txt.

This is one piece. The analysis looks at all of them.

In 30 seconds we compare what a person sees on your site with what an AI crawler receives, give you a score and tell you what to fix first. The analysis is free.

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Questions

What is llms.txt?
An open proposal (llmstxt.org) for sites to give language models a Markdown summary: who you are, what you do and which links to read. It's to an AI what a table of contents is to a book.
Do ChatGPT, Claude or Gemini read it?
It isn't an official standard and no major company has promised to always read it. It's mostly used by coding assistants and some agents when they visit a site. It takes a minute, does no harm and makes you decide which pages matter, which is useful on its own.
Does it replace robots.txt or the sitemap?
No. robots.txt says who can come in, the sitemap lists every page and llms.txt explains which ones matter and why. Ideally you have all three.
What goes in the “Optional” section?
What an AI can skip if it's short on space: the old blog, press releases, secondary docs. The format reserves that name exactly for this.

Your llms.txt,in a minute