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What is an llms.txt file?
llms.txt is an emerging standard that helps large language models understand your website. It is a single Markdown file placed at the root of your domain that summarizes what your site is about and lists the pages you most want AI systems to read.
As AI search from ChatGPT, Claude, Perplexity and Gemini becomes the way buyers discover brands, an llms.txt file gives these models a clean, curated entry point to your content, instead of leaving them to guess from raw HTML. It is the AI era companion to robots.txt and sitemap.xml.
Frequently asked questions
What is the llms.txt standard?
llms.txt is a plain text Markdown file placed at the root of your website that gives large language models (ChatGPT, Claude, Gemini, Perplexity) a clean, curated summary of your site and its most important pages. It helps AI systems understand what your site is about and which pages to read, without wading through your full HTML.
Where do I upload the llms.txt file?
It must live in the root directory of your domain, reachable at https://yourdomain.com/llms.txt, exactly like robots.txt. Download the file from this tool and upload it to the root of your hosting (public/, the web root, or your CDN).
Will llms.txt stop ChatGPT from scraping my site?
No. llms.txt guides friendly AI agents toward the content you want them to read. It is a discovery and curation file, not an access control file. Blocking crawlers is the job of robots.txt. Think of llms.txt as a helpful table of contents for LLMs.