Free · No login · For AI search
llms.txt Checker Does your site have an llms.txt, and is it valid?
Enter any website to check whether it serves an llms.txt file, whether it loads as plain text, and whether it follows the proposed format: a title, a short summary, sections and links. It also checks for llms-full.txt.
Results
What is llms.txt?
A plain-text map of your site for AI tools
llms.txt is a proposed standard (from llmstxt.org) for a Markdown file at the root of a website, like example.com/llms.txt. It gives AI tools a short summary of the site and links to the pages that matter most, without the menus, ads and scripts of the full HTML.
Our take: it's cheap to add and useful for documentation-heavy sites, but no major AI search engine has said it uses llms.txt for ranking or citations. Treat it as a tidy extra, not a replacement for pages that rank. To see whether AI actually mentions you, use the AI visibility checker.
The format the checker expects
# Your Site Name
> One or two sentences on what the site is and who it's for.
## Docs
- [Getting started](https://example.com/start/): set up in five minutes
- [Pricing](https://example.com/pricing/): plans and costs
## Optional
- [Blog](https://example.com/blog/): guides and updatesFAQ
llms.txt checker FAQ
Where does llms.txt go?
At the root of your domain, so it loads at https://yourwebsite.com/llms.txt, served as plain text.
What is llms-full.txt?
An optional companion file with the full text of your key pages in one document, for tools that want everything at once. The checker reports whether it exists.
Does llms.txt help SEO?
It doesn't affect Google rankings, and AI search engines haven't confirmed they use it. It can help AI tools and agents that do read it understand your site quickly.
Is the llms.txt checker free?
Yes. No login or DataForSEO account is needed.
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