---
title: What is llms.txt? · Aeonav
description: A proposed plain-text file that points AI crawlers to your most important content in Markdown.
canonical: https://www.aeonav.fivecoder.com/glossary/llms-txt
updated: "2026-09-11"
---

[AI search glossary](http://www.aeonav.fivecoder.com/glossary)

# llms.txt

A proposed plain-text file that points AI crawlers to your most important content in Markdown.

The llms.txt convention is a simple file at your domain root that lists key pages, often with Markdown versions that are easy for models to read. Adoption is inconsistent and its impact is debated.

The downside is low and the upside is uncertain. It is cheap to add, so most sites may as well, while keeping expectations modest.

## Go deeper

- [Do llms.txt files matter?](http://www.aeonav.fivecoder.com/blog/do-llms-txt-files-matter-for-aeo)

## Related terms

[Structured data](http://www.aeonav.fivecoder.com/glossary/structured-data)[AI crawler](http://www.aeonav.fivecoder.com/glossary/ai-crawler)

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