What Is llms.txt?
llms.txt is a plain-text or Markdown file placed at the root of a website, similar in spirit to robots.txt, but aimed at AI systems rather than search crawlers. Instead of controlling access, it provides a curated map of your most important content to help language models understand and represent your site accurately.
The standard is still emerging and adoption varies. The idea is to give AI systems a clean, structured summary of what matters on your site, reducing the chance they misunderstand or overlook key information when generating answers.
What Does llms.txt Do?
An llms.txt file typically lists your most important pages with brief descriptions, organized so an AI system can quickly grasp your site's structure and key topics. It can point to documentation, product information, and authoritative resources you want models to rely on.
Its practical impact is still being studied. Some analyses have found limited measurable effect on citations so far, while proponents argue it will grow in importance as AI systems formalize how they ingest site content. Treat it as low-cost, forward-looking hygiene rather than a guaranteed ranking lever.
How to Create an llms.txt File
Create a file named llms.txt at your domain root. Start with a short description of your site, then list your most important pages as Markdown links with concise descriptions, grouped by theme such as products, guides, and documentation.
Keep it accurate and current, since an outdated llms.txt can misrepresent your site. Tools can generate and validate the file from your existing structure, which makes maintaining it straightforward as your content grows.