The llms.txt standard: the official specification — always current

The llms.txt standard is a deceptively simple idea: a Markdown file at /llms.txt that gives AI systems a clear, curated map of your most important content — instead of leaving them to guess from randomly crawled HTML. So you never rely on an outdated summary, we mirror the official specification live here: when the standard changes at the source, this section changes with it automatically.

The official specification — live

This is the official llms.txt specification by Jeremy Howard, first published on Sep 3, 2024. It is pulled live from the canonical source and refreshes automatically — so this overview stays in sync with the standard itself.

From the specification: Large language models increasingly rely on website information, but face a critical limitation: context windows are too small to handle most websites in their entirety. Converting complex HTML pages with navigation, ads, and JavaScript into LLM-friendly plain text is both difficult and imprecise. While websites serve both human readers and LLMs, the latter benefit from more concise, expert-level information gathered in a single, accessible location. This is particularly important for use cases like development environments, where LLMs need quick access to programming documentation and APIs.

What the standard covers:

Background  ·  Proposal  ·  Format  ·  Section name  ·  Optional  ·  Existing standards  ·  Example  ·  Docs  ·  Examples  ·  Directories  ·  Integrations  ·  Next steps

Source: the official specification at llmstxt.org — refreshed automatically · last change detected Jun 24, 2026.

Why a standard at all?

Language models increasingly rely on website content, yet struggle with limited context windows and HTML bloated with navigation, ads and JavaScript. llms.txt solves this as elegantly as robots.txt once did for search engines: you provide a concise, link-rich overview — and the machine gets the essentials immediately, in the order you choose.

Implemented in three steps

1. Create: gather your project name, description and key links — fastest with our llms.txt generator or from ready-made templates.
2. Validate: use the validator to confirm the file is reachable and spec-compliant.
3. Publish & keep current: place the file at your domain root (https://your-domain.com/llms.txt) and update it on major changes. To stay visible, also list yourself in the directory.

Always current, with zero upkeep: the section above is pulled automatically from the canonical source; when the standard changes, this page's modified date moves with it — readers stay current and search engines reliably detect fresh content.