AI Website Detector
← All free tools

llms.txt checker

Validate any site’s llms.txt: the required title, the summary, every link section, the Optional section, llms-full.txt, and whether the links actually work.

What a good llms.txt looks like

# Acme Docs

> Acme is a payments API. These docs cover setup, the REST API and SDKs.

## Getting started
- [Quickstart](https://acme.com/docs/quickstart.md): Make a first payment in 5 minutes
- [Authentication](https://acme.com/docs/auth.md): API keys and OAuth

## API reference
- [Payments](https://acme.com/docs/api/payments.md)

## Optional
- [Changelog](https://acme.com/changelog.md)

What this checks

New to the format? Read What is llms.txt? A practical guide — including an honest look at who actually reads it.

Frequently asked questions

What is llms.txt?

llms.txt is a Markdown file at the root of a site (/llms.txt) that gives AI tools a short, curated guide to its most important pages. It was proposed by Jeremy Howard of Answer.AI in September 2024.

What does a valid llms.txt need?

Only an H1 title ("# Site name") is required. The recommended structure adds a "> summary" blockquote, then "## " sections listing links as "- [name](url): notes". A section titled "Optional" marks links an AI may skip.

What is llms-full.txt?

A companion file that contains the full text of your key pages in one document, for tools that want everything at once instead of following links.

Does ChatGPT or Google use llms.txt?

No major AI company has officially committed to reading llms.txt, and Google has said it does not use it for Search. It costs little to add, but don’t expect it to change rankings or traffic on its own.

Why does the checker only test 10 links?

To keep checks fast and polite to your server. The first 10 links are usually your most important pages; if those work, the file is in good shape.

More free tools