llms.txt is a proposed web standard file (similar to robots.txt or sitemap.xml) designed to help large language models and AI systems better understand website content, structure, and important information. It provides AI-friendly metadata about a site's purpose, key content, and preferred citation methods.
The llms.txt file typically includes information such as site description and purpose, key pages and their topics, preferred citation format, content categories, update frequency, and contact information for AI-related inquiries. This structured information helps AI systems accurately represent and cite the website.
Implementing llms.txt is a proactive GEO strategy. By explicitly telling AI systems what your site is about and which content is most important, you increase the likelihood of accurate representation in AI responses. It's particularly valuable for complex sites where AI might struggle to identify the most authoritative content.
While llms.txt is not yet a universal standard, early adoption signals AI-readiness and may provide competitive advantage as AI systems increasingly look for structured guidance about website content.
Key factors
- Site description
- Key page identification
- Content categorization
- Citation preferences
- Update frequency
Examples
- A documentation site using llms.txt to highlight their most important technical guides
- An e-commerce brand implementing llms.txt to identify product categories and key landing pages
- A news organization using llms.txt to indicate content freshness and citation preferences
Questions people ask
Is llms.txt an official standard?
llms.txt is a proposed standard gaining adoption but not yet universally recognized. Major AI companies are aware of it, and implementation is recommended as a best practice for AI optimization. The standard continues to evolve.
How do I create an llms.txt file?
Create llms.txt as a plain text file in your site root. Include site description, key pages with brief descriptions, content categories, and any special instructions for AI systems. Follow emerging best practices and update as standards evolve.
Does llms.txt replace robots.txt?
No. llms.txt complements robots.txt. While robots.txt controls crawler access, llms.txt provides context about content. Use both: robots.txt for access control, llms.txt for content guidance.
Which AI systems support llms.txt?
Support varies and is evolving. Some AI systems actively look for llms.txt, while others may incorporate it in the future. Implementing it now positions your site for growing AI system support.