Does your site have an llms.txt?
llms.txt is an emerging standard that tells AI crawlers what your site is and how to understand it — like a robots.txt for language models.
How it works
What the check actually does
1. Enter a domain
Type in any website, yours or someone else's.
2. We look for the file
We check whether that site publishes a file at /llms.txt.
3. You get a clear answer
Found or missing, right away. No crawl of the whole site required.
Frequently asked questions
What is llms.txt?
It's a plain text file, written in Markdown, that a website can publish at yoursite.com/llms.txt. It gives AI models a short, structured summary of what the site is and links to its most important pages, similar to how robots.txt tells search engines what they can crawl.
Why does llms.txt matter?
AI models increasingly answer questions using information pulled from the web. An llms.txt file gives them a clean, direct summary instead of making them guess from a homepage's navigation and marketing copy. It's a way to help AI models read your site correctly.
What does this checker actually do?
We send a quick request to yoursite.com/llms.txt and check whether it exists. That's it. We don't crawl the rest of the site or store anything about its content.
Do I need an llms.txt file?
It's optional. There's no proof yet that having one changes how often AI models mention you. It's a low-effort way to make your site's information available in a format built for AI models to read, similar to publishing a sitemap for search engines.
Does missing one hurt my AI visibility?
There's no evidence it directly affects whether AI models mention you. What it does is make your site's key information easier for a model to find and read correctly, which can't hurt.
I don't have one. Can you make me one?
Yes. Use our free llms.txt generator. It reads your site's real pages and writes a spec-compliant file you can copy or download.
Is this free?
Yes. Free, instant, and no signup required. You can run up to twenty checks a day.