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llms.txt is a proposed standard by Jeremy Howard (Answer.AI) that helps AI assistants like ChatGPT, Claude, and Perplexity understand your website. Like robots.txt tells search engines which pages to crawl, llms.txt tells language models what your site is about in their native language: markdown.
Place an llms.txt file at your root directory (example.com/llms.txt) to give AI systems reliable, structured information about your content, services, and how to describe your business.
| robots.txt | llms.txt | |
|---|---|---|
| Purpose | Block crawlers | Guide AI understanding |
| Format | Directives | Markdown |
| Target | Search bots | Language models |
| Goal | Control indexing | Improve citations |
llms.txt is a proposed standard that helps AI assistants like ChatGPT, Claude, and Perplexity understand your website. Similar to robots.txt for search crawlers, llms.txt provides structured information about your site in a format optimized for language models. Place it at your root directory (example.com/llms.txt) to tell AI systems what your site contains and how to describe your business.
Upload your llms.txt file to your website's root directory so it's accessible at yourdomain.com/llms.txt. Most hosting platforms (Vercel, Netlify, WordPress, Shopify) support static file uploads. For WordPress, you can use a plugin or upload directly to your public folder.
Update your llms.txt when your site structure changes significantly - such as adding new product lines, major content sections, or rebranding. For most sites, quarterly reviews are sufficient. You can regenerate it using this tool anytime.
llms.txt makes your content easier for AI systems to understand and cite accurately. While having an llms.txt file doesn't guarantee citations, it provides AI assistants with reliable, structured information about your site. Actual citations depend on content relevance, authority, and the specific query.
robots.txt tells search engine crawlers which pages to index or ignore. llms.txt tells AI language models what your site is about and how to describe it. robots.txt uses directives (Allow, Disallow), while llms.txt uses markdown with structured sections. Both serve different but complementary purposes.
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