What Is llms.txt and Does Your Website Need One?

By Site Axis · Updated November 10, 2026 · 5 min read

What the file looks like

An llms.txt file is plain Markdown. It starts with your name as a heading, a one-paragraph summary in a blockquote, and then sections of links with short descriptions. Here is a simplified version for a local business:

# Hearthline Builders

> Kitchen and bath remodeling in Lancaster County, PA.
> Design and construction by one team since 2009.

## Services
- [Kitchen remodeling](https://example.com/kitchens/): full remodels, typical cost $45k to $120k, 8 to 12 weeks
- [Bathroom remodeling](https://example.com/baths/): typical cost $18k to $45k

## Company
- [About](https://example.com/about/): licensed PA contractor PA012345
- [Reviews](https://example.com/reviews/)

Some sites also publish llms-full.txt, which contains the full text of key pages in one file so a model can read everything in a single request. You can see ours at /llms.txt and /llms-full.txt.

Who actually reads it?

This is where honesty matters. As of late 2026:

• Google has said its search systems do not use llms.txt, and that normal SEO practices are what count for AI Overviews.
• AI coding tools and developer documentation are where llms.txt has caught on most. Many software companies publish one so assistants can read their docs accurately.
• AI assistants browsing on a user's behalf may read it if they land on it, but no major assistant has publicly committed to using it as a ranking or citation signal.

In other words, llms.txt is not robots.txt. It does not control anything, and publishing one will not make ChatGPT recommend you by itself.

So should you add one?

Probably yes, for three reasons that have nothing to do with hype:

1. It costs almost nothing. It is one text file, maybe 30 minutes of work.
2. Writing it is useful. Summarizing your business in one paragraph and picking your ten most important pages forces the same clarity that helps your real pages get quoted.
3. It cannot hurt. Search engines ignore it if they do not use it.

What you should not do is prioritize it over the things that demonstrably matter: crawlable pages, answer-first content, structured data, consistent business listings and reviews. If someone is selling you llms.txt as the key to AI search, be skeptical.

How to add one

1. Create a plain text file named llms.txt.
2. Start with # Your Business Name and a one-paragraph summary as a blockquote (lines beginning with >).
3. Add sections (## Services, ## Company, ## Guides) with Markdown links and a short note on each, including facts like prices and service areas.
4. Upload it to the root of your site so it loads at yourdomain.com/llms.txt.
5. Keep it updated when prices or services change. A stale file is worse than none.

On WordPress, several SEO plugins can now generate one for you. Review what they produce, because auto-generated files often list every page instead of the ones that matter.

For the bigger picture, read our guide to AI search optimization, or get a free snapshot of how assistants see your business today.