# What is llms.txt? - Changebot Glossary

URL: https://www.changebot.ai/glossary/llms-txt/
Description: llms.txt is a plain-text file at the root of a website that gives large language models a curated, Markdown-formatted map of the site's most useful content. It was proposed by Jeremy Howard in 2024 and is a convention, not a standard: no model is obliged to read it.

[Glossary](/glossary/)

# What is llms.txt?

llms.txt

llms.txt is a plain-text file at the root of a website that gives large language models a curated, Markdown-formatted map of the site's most useful content. It was proposed by Jeremy Howard in 2024 and is a convention, not a standard: no model is obliged to read it.

## What the file contains

The file is Markdown: an H1 with the site or product name, a short summary, then lists of links with one-line descriptions of what each page covers. Many sites also publish an llms-full.txt containing the full text of those pages, so an assistant can retrieve the whole corpus in a single fetch.

It is complementary to robots.txt and sitemap.xml rather than a replacement. robots.txt states who may crawl, sitemap.xml lists every URL, and llms.txt states which pages are worth reading and what they say.

## Why sites publish one

HTML pages carry navigation, scripts, and styling that waste an assistant's context window and obscure the content. A Markdown index — and Markdown versions of the pages themselves — gives a model the substance without the markup, which makes accurate quoting and citation more likely.

Changebot publishes both files: llms.txt as the index and llms-full.txt as the full corpus, alongside a Markdown twin of every content page.

## Related terms

-   [Changelog](/glossary/changelog/) — What is a changelog?
-   [Model Context Protocol (MCP)](/glossary/mcp/) — What is MCP?

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