Free llms.txt generator and checker
llms.txt is a small Markdown file at the root of your site that gives AI tools a short guided tour: who you are, what you do, which pages matter. It is an emerging convention that some AI tools read -- in our July 2026 study of the Tranco top 1,000 sites, 11.9% had published one. Google has said it does not use it, so treat it as a cheap experiment, not a requirement. We check whether you have one, and build you a valid one either way. No email.
free / no email / ~30s
Fill in four things. Copy the file.
The format comes from the llms.txt proposal: a Markdown file with your site name as the heading, a one line description as a quote, and lists of links. Everything below runs in your browser. Nothing you type is sent anywhere.
The file builds here as you type. It stays in your browser; we never see it.
- One H1 with your site nameThe first line is
# Your Site Name. It is the only required part of the format. - A one line summary as a blockquoteThe
>line tells an AI tool what your site is in one sentence. Write it the way you would tell a stranger. - Plain Markdown links to your key pagesPoint to the handful of pages that actually answer questions: services, pricing, contact. A short honest list beats a full sitemap dump.
- Upload it to your site rootThe file must live at
yourdomain.com/llms.txt, the same place robots.txt lives. Anywhere else and nothing will find it.
Not sure if you need one? Read what llms.txt actually does: it is not mandatory, but gives AI agents a clear map of your content. The work that actually decides whether AI engines cite you is covered in what AEO is and graded in the full AEO audit.
An llms.txt only helps if AI crawlers can actually reach your site first. The AI crawler access checker tests your robots.txt against 15 bots by name and tells you exactly who is blocked.
Adding llms.txt is step one. Run a GEO audit to verify AI crawlers can actually read the content you have opened -- an llms.txt file does not help if a CDN firewall is still blocking the crawlers.
The honest version.
What is an llms.txt file?
An llms.txt file is a plain Markdown file published at the root of a website, at /llms.txt, that gives AI tools a short guide to the site: the site name as a heading, a one line description as a blockquote, and lists of links to the pages that matter most. It is a community convention proposed in 2024, not an official web standard, and support varies from tool to tool.
Do I need an llms.txt to show up in Google or AI answers?
No. Google's AI search guidance says you do not need to create new machine readable files, AI text files, or Markdown to appear in generative AI search, and Google has said it does not use llms.txt. Some non-Google AI tools do read the file, so publishing one is a low cost experiment with a possible upside and no downside. Any tool that fails your site for a missing llms.txt is scoring folklore, not fact.
Where do I put the llms.txt file?
Upload it to the root of your website so it loads at yourdomain.com/llms.txt, the same location where robots.txt lives. Serve it as plain UTF-8 text, not as an HTML page. Then open that address in a browser: if you can read the file there, so can any tool that looks for it. The checker at the top of this page confirms it from the outside.
llms.txt is one check. We run 164.
This file is one small, optional signal. Whether search engines and AI assistants can actually reach, read and quote your site comes down to the fundamentals: crawler access, content that survives without JavaScript, structured data that parses, an answer worth lifting. The full AuditLamp audit scores all 164 documented checks in one free scan, full score on screen, no email taken. We make money on the watching and the fixes, not your inbox.