llms.txt
llms.txt is a plain-text file placed at the root of a website that gives AI systems a curated, machine-readable guide to the site's most important pages and information.
Modeled loosely on robots.txt, llms.txt is a proposed standard for helping large language models find and understand a site's key content — a concise map of what matters, in Markdown-style text, rather than making the model infer it from cluttered HTML.
It is an emerging Generative Engine Optimization tactic. Support is not universal yet, but adding one is low-cost and signals that a site is thinking about AI discoverability.
Frequently asked
Where does llms.txt go?
At the root of your domain, e.g. https://example.com/llms.txt, so AI crawlers can find it the same way they find robots.txt.
Is llms.txt required?
No. It is an optional, emerging convention. It can help AI systems parse your site, but it is not yet a formal standard adopted by every engine.
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