FREE TOOL
Check if your llms.txt is built right
Paste any site. We fetch its llms.txt, check the structure against the format (title, summary, curated sections, described links), flag files that are really sitemap dumps, and test whether the URLs inside actually resolve. Plain results, no opinions.
What it does?
llms.txt Validator fetches a site's llms.txt (falling back to llms-full.txt or ai.txt) and checks it against the format: one H1 title, a one-line blockquote summary, named H2 sections, and markdown links with short descriptions. It flags files that are really unsorted link dumps instead of curated lists, then resolves the file's own-site links and reports which ones are broken. It only reports what it finds.
How it works?
Paste a URL.
A bare domain or a full page URL both work. No signup and nothing is stored.
We validate the file.
Title, summary line, sections, and link descriptions are each checked against the llms.txt format.
We test the links inside it.
Each linked URL is fetched and broken links are listed, up to 24 links per check.
What you get?
A structure report.
Every format rule is a separate pass or fail line with the exact detail behind it.
A live link test.
The file's own-site links are fetched and broken ones are shown with the response status.
The raw file.
The validated content is shown in full so you can compare the findings to the source.