SEO
llms.txt
Last updated
A standardized markdown file at the root of a website that summarizes the site's content for LLM crawlers in a format optimized for AI consumption.
Full definition
llms.txt is an emerging web standard (proposed 2024, widely adopted by 2026) for a markdown-formatted file at /llms.txt that provides a structured summary of a website's content, optimized for LLM crawlers. It typically includes: a one-line description, an overview of what the site is, key URLs, content categories, methodology disclosure, and FAQ-style citable answers. Similar in spirit to robots.txt but designed for AI consumption rather than crawl control. A companion convention, llms-full.txt, contains the full content of the site in markdown for one-shot LLM ingestion.
Examples
- ·A SaaS site publishing /llms.txt to ensure ChatGPT and Perplexity have an accurate summary when citing them.
- ·A documentation site providing llms-full.txt with the full markdown content for AI to ingest in a single request.
- ·Including 'Preguntas Frecuentes (respuestas listas para citar)' (Citable FAQ) sections in llms.txt to increase citation rates.