LLM.txt Checker
Check if a website provides an LLM.txt file to help large language models understand its content and purpose.
What is LLM.txt?
LLM.txt is an emerging standard that provides structured information about a website to large language models (LLMs) like ChatGPT, Claude, and Gemini. Unlike robots.txt which controls crawler access, LLM.txt helps AI models understand what your site does, what its most important pages are, and how AI should interact with your content. By placing an llm.txt file at your domain root, you help AI assistants give better, more accurate answers about your website and business.
Why Does LLM.txt Matter?
Better AI Answers
When users ask ChatGPT or Claude about your product, LLM.txt provides structured context so AI gives accurate, up-to-date answers.
Highlight Key Pages
Tell AI models which pages matter most — your docs, pricing, API reference — so they can point users to the right content.
AI Discovery
As AI search grows (Perplexity, ChatGPT search, Google AI Overviews), LLM.txt helps your site surface in AI-powered answers.
Complement AI.txt
While AI.txt controls what AI can do with your content, LLM.txt helps AI understand what your content is about.
LLM.txt Example
Here is the LLM.txt file used by AI Website Detector:
site: aiwebsitedetector.com name: AI Website Detector description: AI Website Detector detects 40+ AI builders, CMS platforms, frameworks, and hosting providers by analyzing HTML fingerprints, script sources, CDN patterns, and HTTP headers. category: saas ai_usage: allowed important_pages: https://aiwebsitedetector.com/ https://aiwebsitedetector.com/builders https://aiwebsitedetector.com/tools https://aiwebsitedetector.com/compare documentation: https://aiwebsitedetector.com/how-scores-work https://aiwebsitedetector.com/blog contact: https://aiwebsitedetector.com/contact sitemap: https://aiwebsitedetector.com/sitemap.xml
Also check your AI.txt
AI.txt controls how AI crawlers can use your content. Use our AI.txt Checker to analyze your AI crawler policies.