llms.txt Field Reference
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Claude
Gemini
PerplexityThis is the complete field reference for the llms.txt specification.
The llms.txt field reference documents all supported sections including site name, description, key pages, documentation links, topic lists, and contact information with formatting requirements.
Required Fields
| Field | Format | Description |
|---|---|---|
| Site name | # Site Name | H1 heading with site name |
| Description | > One-line description | Blockquote with site purpose |
Recommended Sections
| Section | Format | Content |
|---|---|---|
| About | ## About | 2-3 sentence description |
| Key Pages | ## Key Pages | Important page links |
| Documentation | ## Documentation or ## Docs | Doc page links |
| Topics | ## Topics | Topic list |
Link Format
- [Page Title](URL): Brief description of the pageFull Example
# Your Site
> Your site in one sentence.
## About
Two to three sentences about your site.
## Key Pages
- [Page](https://site.com/page): Description
## Topics
- Topic 1
- Topic 2Related Articles
- llms.txt Reference — Full specification
- llms.txt Template — Starter template
- How to Create llms.txt — Tutorial
Related Articles
tutorial
How to Create llms.txt
Step-by-step tutorial for creating and deploying an llms.txt file to make your site's content discoverable by AI systems and LLMs.
template
llms.txt Starter Template
A ready-to-use llms.txt template with annotations explaining each section and customization options.
reference
llms.txt Reference
llms.txt is a proposed standard file that provides a machine-readable index of site content for AI crawlers. It tells LLMs what a site contains and how to navigate it.