We built MakeLLM, a free tool that writes your llms.txt

AI assistants are reading your website right now, and most of them are guessing. They crawl your pages, fight your navigation, and try to reverse-engineer what your site is actually about. The llms.txt standard fixes that. It is a single Markdown file at the root of your domain that tells a language model what your site is, what matters on it, and where to find the good stuff.

The catch is that writing a good one by hand is tedious. You have to inventory your URLs, group them sensibly, summarize each section, and keep it tidy. So we built a tool that does it for you, and we are giving it away.

Meet MakeLLM

MakeLLM takes a URL and hands back a clean, spec-compliant llms.txt in seconds. No account, no email gate, no cost. You paste your domain, watch a short crawling and writing sequence, and get a finished file in a code panel with Copy and Download buttons. Publish it at yourdomain.com/llms.txt and you are done.

How it works

When you submit a domain, the request goes to a small serverless function that does the crawling. (A browser cannot fetch a third-party sitemap directly because of CORS, so this part has to run on the server.) That function:

1. Resolves your sitemap, trying sitemap.xml, then sitemap_index.xml, then the Sitemap line in robots.txt.
2. Parses the URLs, groups them into sensible sections, and ranks and caps the list.
3. Fetches your homepage and a few top pages to read the real titles and meta descriptions.
4. Asks Claude to write a clean llms.txt from that crawled data, using your actual URLs.

Because this is a free tool, we keep the AI call cheap and bounded. It uses the most affordable Claude model, a tight token ceiling, and a curated input. If the AI step is ever unavailable, the tool falls back to a deterministic generator that classifies your domain into an archetype and builds a plausible file anyway, so it never dead-ends on you.

Why we are giving it away

We build and scale software for SaaS companies all day, and the shift toward AI-driven discovery is real. A good llms.txt is a small, high-leverage thing that more sites should have. Making it free to generate felt like the right way to be useful. No upsell attached.

Try it on your own site and see what it produces. Generate your llms.txt at makellm.com.