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LLMs.txt Checker

Detect whether your site publishes an LLMs.txt file to guide how AI language models like ChatGPT and Claude access and cite your content.

What is LLMs.txt Checker?

LLMs.txt is a proposed standard file that websites can publish to provide structured information about their content to AI language models. Similar to how robots.txt guides search engine crawlers, LLMs.txt helps AI systems understand what content is available, how it should be used, and any usage restrictions the site owner wants to communicate.

How to Fix It

Create a file named llms.txt and place it in your website's root directory (e.g., yoursite.com/llms.txt) or in the .well-known directory. Include references to your key content pages and any usage guidelines you want AI models to follow.

Best Practices

  • Place your llms.txt file at /llms.txt or /.well-known/llms.txt for discoverability.
  • Include clear references to your most important content pages.
  • Specify any content usage restrictions or licensing terms.
  • Keep the file updated as you add or remove significant content.
  • Use the file alongside robots.txt for comprehensive AI access control.
  • Consider adding context about your site's purpose to help AI models understand your content.