llms.txt is a text file that allows website owners to control how artificial intelligence (AI) accesses their content. It serves primarily to make large language models (such as ChatGPT, Gemini or Claude) can easily understand the content and important pages of your website and know what they are allowed to do on your website.

While classic search engines respect the file robots.txtthat tells them what they can index, language models not only index the content, but also process it and use it for training or generation of answers. And that's where he has llms.txt his role.

To what llms.txt Serves

The goal is to give control over it, how AI tools deal with web content and at the same time help you find the key content pillars of the site. With this file you can:

  • provide AI models with a complete list of web pages in a simple markdown format,
  • determine which parts of the site are accessible,
  • whether the content can be used to train models,
  • or whether it should be completely blocked.

For example, this entry can be used to restrict access completely:

user-agent: gptbot
disallow: /

This is the search robot's GPTBot (from OpenAI) commands that may not access the website at all.

Why it's important right now

Generative AI now displays content in direct answers/summaries even without having to click through to the original site. This means that the reader often sees the information without visiting your site - and without citing the source.

File llms.txt is currently voluntary standardbut major AI companies are starting to respect it. OpenAI, Google and other developers claim to modify the behaviour of their models accordingly. On some sites, OAI-SearchBot even searches for new information every 15 minutes.

How it differs from other files

It is important to understand that:

  • robots.txt is designed for search robots,
  • sitemap.xml helps search engines and users understand site navigation,
  • While llms.txt targets AI models directly - especially the generative ones.

What this means for your website

Whatever your goal is protect your contentor, conversely, do you want make it easier for large language models to find your content easily, it's worth a file llms.txt implement. Especially on websites built on WordPress, its implementation is particularly easy.

Adding this file is one of the measures that can significantly affect the visibility of your website in language models and AI Overviews (GEO).

Do you want to have a website that will bring in customers through organic search? Book a non-binding consultation, it's completely free.

The llms.txt file provides AI models with instructions on how to process your content, but it doesn’t determine who can access your website in the first place. That’s decided by the robots.txt file and settings with providers like Cloudflare. For a complete overview of which bots to allow and which to block, see the article on AI Robots on Your Website.