What is an llms.txt file, and do I need one?
An llms.txt file is a short Markdown file at the root of a website that names the business, sums it up and links its most useful pages for AI tools. It's an informal proposal, not an official standard, and Google says its AI features don't need one. It's optional: helpful pages and accurate listings matter far more.
The short version
- llms.txt is a plain Markdown file at yourdomain.com/llms.txt.
- It gives AI tools a short summary of your business and links to your best pages.
- It’s a proposal from 2024, not an official standard, and support varies by tool.
- Google says you don’t need AI text files to appear in its AI features.
- It doesn’t block or allow anything. That’s robots.txt’s job.
What goes in an llms.txt file?
The llms.txt proposal describes a simple layout, in this order:
- A title line (a Markdown H1) with your business name. It’s the only required part.
- A one-line summary in a blockquote: what you do and where.
- Optional short notes, such as hours or areas served.
- Sections of links under H2 headings, like “Services” or “Help”, each link with a few words of description.
- An optional section for less important pages a tool can skip.
For a small business, that might be ten or fifteen links: each service page, your contact page, your FAQ or Answers pages and your About page. Save it as llms.txt at the root of your site.
Why would a business bother?
It’s cheap to add and gives tools that read it a tidy map of your best content. If an assistant fetches your site to answer a question, a clean list of service pages can point it to the right one.
Keep the expectation modest, though. Google’s AI features guide says “you don’t need to create new machine readable files, AI text files, or markup” to appear in AI Overviews or AI Mode. Other companies use the file unevenly.
What are the common mistakes?
- Treating it as a ranking trick. It won’t make an assistant recommend you on its own.
- Copying your whole site into it. It’s a short guide, not a duplicate of every page.
- Letting it go stale. A link to a deleted page or an old service is worse than no file.
- Confusing it with robots.txt. Robots.txt tells crawlers where they may go. llms.txt only suggests what to read. See whether to block AI crawlers.
What if adding it changed nothing?
That’s normal. The file is a small helper, not a lever. If you want AI tools to describe you better, the work that counts is plain answers on your pages, consistent details on your listings, structured data and reviews. See how to show up in AI answers and what schema markup is.
How much does it cost, and how long does it take?
The file is free. Writing one takes about as long as listing your main pages with a line each. Keep it current whenever you add or remove a service page.
How does E-3 handle this?
If you’d like one on a site E-3 looks after, ask us. The work that matters more, such as Answers pages and schema, is part of our SEO and AI search service.
Related questions
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