Free llms.txt Generator and Checker
llms.txt is a small file you put on your website so AI tools like ChatGPT, Claude and Perplexity can understand what your site is and recommend it accurately. Build one in a minute, or check the one you already have. Free, no sign-up, nothing uploaded.
Build your llms.txt
Put the finished file at the root of your site: yoursite.com/llms.txt. Everything happens in your browser — nothing is uploaded.
Check an existing llms.txt
Why it matters now
More people now find websites by asking an AI instead of scrolling search results. An llms.txt gives that AI a clean, official map of your site — your own words, your key pages — instead of letting it guess from scraped fragments.
Five minutes, not a project
It is one plain-text Markdown file at your site root. No plugin, no code changes, no developer needed. Generate it above, upload it next to your homepage, and you are done.
Already have one?
Paste it into the checker above. It verifies the title line, the summary, the section headings and that every link is a full working URL — the details AI crawlers actually read.
Questions
Where does the file go? At the root of your domain, so it answers at yoursite.com/llms.txt — the same level as your homepage and robots.txt.
Does it replace SEO? No. It complements it: search engines crawl pages, AI assistants read summaries. The llms.txt is the summary, written by you.
What should the summary line say? One sentence a stranger would understand: what the site offers and who it is for. Skip slogans.
Building AI agent skills too? Try our free SKILL.md generator and checker — the companion format for teaching AI assistants new abilities.
✓ Last checked November 2, 2026 — we re-test this tool every week to make sure it still works.