Glossary

llms.txt

llms.txt is a proposed plain-text file at /llms.txt that gives language models a short description of a site and a curated list of its important pages with one-line summaries.

By Reflexa Technologies — the team building Reflexa, the agent that works on your site · updated 16 October 2026

Why it matters

It costs nothing and gives a fetcher the map a human would give a new colleague. Adoption by the engines is partial and undocumented; the file does no harm and is read by some retrieval tools today.

How to see it on your own site

Open https://yourdomain/llms.txt. The validator checks the format and resolves the links.

Free tool →

Related terms

Questions people ask.

What is llms.txt?

llms.txt is a proposed plain-text file at /llms.txt that gives language models a short description of a site and a curated list of its important pages with one-line summaries.

Why does it matter for AI visibility?

It costs nothing and gives a fetcher the map a human would give a new colleague. Adoption by the engines is partial and undocumented; the file does no harm and is read by some retrieval tools today.

How do I see it on my own site?

Open https://yourdomain/llms.txt. The validator checks the format and resolves the links. The free tool does it for you →

See it measured on your site.

The free page check runs the 23 checks on your public pages — the terms on this page, observed on your pages.

Run the free check →