Free tool

llms.txt validator

Check whether your site serves a valid /llms.txt — the markdown file that points AI agents at your most important content — and whether it has the links and structure that make it useful. Free, no account.

What llms.txt actually is

A plain-markdown file at your site root: a one-line description of your site plus grouped links to the pages an AI agent should read first. Think of it as a curated sitemap for language models — docs, pricing, key product pages.

The honest status, mid-2026

Google's Lighthouse now checks for llms.txt in its agentic-browsing audits, and adoption is growing — but most AI labs don't consume the file yet, and Google says it isn't needed for AI Search features. Our take: it's a cheap, forward-looking signal of agent-readiness, not a ranking lever. Anyone telling you otherwise is overselling.

What a good one looks like

# Your Company

> One line on what you do.

## Docs
- [Getting started](/docs/start): Quickstart
- [API reference](/docs/api): Full API

## Key pages
- [Pricing](/pricing): Plans
- [Products](/products): Catalog

llms.txt is one of 50+ signals in the full audit — structured data depth, agent actionability, crawl hygiene. Run the free AI-readiness scan.