Free llms.txt generator and checker

Make an llms.txt file for your site, or paste the one you have and see what to fix. No signup. Your text stays in your browser.

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What is llms.txt?

llms.txt is a plain Markdown file at the root of your site (yoursite.com/llms.txt), or under the v2 proposal at any path within it. It gives language models and AI tools a short map of your most useful pages: a title, a one-line summary and lists of links grouped under headings.

It's a community proposal (v2, updated August 10, 2026), not an adopted web standard. Having one won't guarantee traffic, rankings or citations. It's cheap to add and easy to get wrong, which is why we built the checker.

What the checker looks at

• Exactly one H1 title (# Name), and it comes first. This is the only required section (an optional byte-order mark is fine)
• Recommended: a blockquote summary (> ...) and H2 sections with links
• No headings in the details before the first H2
• Every list item in an H2 section is a Markdown link: [title](https://...)
• Absolute https links only (our recommendation)
• File not empty and under 1 MB

Each problem has a short code and a plain-English fix. The score is our own 0–100 rule check, not an official validation.

How it works

1. Paste your llms.txt, or fill in the generator form.
2. Get your format score and suggested changes.
3. Copy or download the file, or share a link to your result.

Guides

• The Lighthouse llms.txt audit: what it checks and how to pass
• llms-full.txt vs llms.txt: what it is and whether you need one
• llms.txt examples: 5 real files, annotated
• llms.txt on GitHub Pages: where the file goes for user and project sites
• llms.txt on Shopify: what your store already serves, and how to change it
• llms.txt vs robots.txt: what each file does (and doesn't)
• llms.txt for WordPress: plugin or manual upload?
• What is llms.txt? The v2 proposal explained in plain English

FAQ

Is it free?

Yes. No signup, no account.

Do you store my file?

No. Checking and generating happen in your browser, and the text isn't sent to us. See Privacy.

Will llms.txt improve my SEO?

We can't promise that, and nobody else honestly can either. Treat it as a low-cost signal for AI tools, not a ranking factor.

Is this the official llms.txt validator?

No. We're independent. The proposal lives at llmstxt.org.

llms.txt vs robots.txt?

robots.txt tells crawlers what they may access. llms.txt suggests what's worth reading. They do different jobs.

Is this SEO or legal advice?

No. It's a formatting tool.