A small file with an outsized job.
llms.txt is a plain-text file you publish at your site root. It tells AI systems which pages on your domain matter most, in what order, and what each one is about. The format is markdown-flavored so any model can parse it the same way a person would.
It does not replace robots.txt, sitemaps, or strong content. It complements them. Where robots.txt sets access permissions and sitemaps list URLs, llms.txt explains intent — here is what we want AI to know about us, and here is where to find it.
Support is still emerging, so think of llms.txt as low-cost, forward-looking signal hygiene. The file is short, hand-curated, and easy to keep current as your site grows.
Sits at /llms.txt
Lives at your site root, the way robots.txt does.
AI crawlers read it
GPTBot, ClaudeBot, PerplexityBot, and others look for it.
Like robots.txt for LLMs
Guides, not gates. It points to what matters most.
Improves citation accuracy
A clean map helps AI quote the right pages, not the wrong ones.