llms.txt Explained: What It Is and Whether Your Site Needs One

If you follow AI search discussions, you've probably seen llms.txt mentioned. It is simple, cheap to implement and frequently overhyped. Here is a clear-eyed look.

What llms.txt is

llms.txt is a proposal, first published in 2024, for a Markdown file at the root of a website (/llms.txt) that gives language models and AI tools a curated overview of the site. The format is intentionally minimal:

# Site name

> A one-paragraph summary of the site.

## Section

- [Page title](https://example.com/page): Short description

The idea is that a model, or a developer feeding documentation to a model, can read one small file to understand what matters on a site instead of crawling and parsing dozens of HTML pages.

What it is not

• It is not robots.txt. It does not allow or block anything. Access is still governed by robots.txt.
• It is not an official standard adopted by the major AI providers, and none has publicly committed to using it for ranking or citation.
• It is not a ranking factor that anyone has demonstrated. Be wary of claims that it will boost AI visibility.

So why bother?

Because it is low effort and has real, if modest, uses:

• Developer tools and agents increasingly look for it, especially for documentation.
• Writing it forces you to decide which pages represent your business, which is useful in itself.
• It provides a clean, accurate summary that any system can read in one request.

How to create one

1. Use our free llms.txt generator to build a draft from your sitemap.
2. Edit the summary line so it states exactly what you do and for whom.
3. Keep it short: your key product, pricing, documentation and company pages.
4. Publish it as plain text at https://yourdomain.com/llms.txt.

The bigger picture

An llms.txt file won't make up for a site that AI crawlers can't access or that never explains clearly what it offers. Fix those first. Our AI readiness checker tests both, plus llms.txt, in one go.