What Is llms.txt?

Why it matters

As more people research through AI tools, you want those models to read the right pages and represent your business accurately. An llms.txt file offers a simple, low-effort way to point them to your best content, much like a sitemap helps search crawlers. Adoption is still early and no major AI provider treats it as an official ranking signal yet, but publishing one is low-risk and positions your site for a more AI-driven web.

Example

An open-source software company adds an llms.txt file at example.com/llms.txt listing its documentation, API reference, and pricing pages in Markdown, each with a one-line description. When a developer asks an AI assistant how to authenticate with the company's API, the model can lean on that curated file to surface accurate, up-to-date steps instead of guessing from scattered or outdated pages.