The /llms.txt file – llms-txt
December 15, 2025
We propose adding a /llms.txt markdown file to websites to provide LLM-friendly content. This file offers brief background information, guidance, and links to detailed markdown files.llms.txt markdown is human and LLM readable, but is also in a precise format allowing fixed processing methods (i.e. classical programming techniques such as parsers and regex).We furthermore propose that pages on websites that have information that might be useful for LLMs to read provide a clean markdown version of those pages at the same URL as the original page, but with .md appended. (URLs without file names should append index.html.md instead.)
Source: The /llms.txt file – llms-txt
LLMs.txt it’s one of a number of proposals for how best to expose the content of a web page, site, or app to large language models.
Llms.txt is a proposal initially from Jeremy Howard, well-known in the Python and AI communities, founder of FastAPI and now FastAI (as well as FastMail).
