An llms.txt file is a proposed standard — a simple text file placed at your site’s root — that gives AI systems a clean, curated guide to your most important content. Think of it as a robots.txt-style signpost designed for large language models rather than search crawlers.
What is an llms.txt file?
llms.txt is a markdown-based file, hosted at yourdomain.com/llms.txt, that lists and links to the key pages and resources you want AI systems to understand. The idea is to provide a concise, structured overview of your site so models can find authoritative information without wading through navigation, scripts, and clutter.
How is llms.txt different from robots.txt?
- robots.txt tells crawlers what they may or may not access.
- llms.txt proactively highlights your best content for AI systems in a clean format.
- robots.txt is restrictive; llms.txt is descriptive and curatorial.
Should your site have an llms.txt file?
It’s an emerging, voluntary standard, and adoption by AI platforms is still uncertain. Adding one is low-risk and can help you present a clear, curated view of your content, but it isn’t a guaranteed ranking or citation booster. For most sites, it’s a reasonable, forward-looking experiment rather than a must-have.
What goes in an llms.txt file?
- A short description of your site and what it covers.
- Links to key pages — cornerstone content, documentation, and resources.
- Brief context for each link so models understand its purpose.
- Optional supporting files for deeper detail.
How do you create one?
Write a markdown file listing your most valuable URLs with short descriptions, keep it focused on genuinely useful content, and upload it to your site’s root directory. Keep it updated as your cornerstone content changes.
Frequently asked questions
Do AI systems require llms.txt?
No. It’s optional and not universally adopted. Its value depends on whether AI platforms choose to use it.
Will it improve my AI visibility?
It may help models find your best content more easily, but it’s not a guaranteed boost. Strong, well-structured content remains the bigger factor.
The takeaway: llms.txt is a simple, low-risk way to hand AI systems a curated map of your best content. It’s worth adding as a forward-looking step, with expectations kept realistic.