llms.txt validator
Paste your /llms.txt content and check its structure against the llmstxt.org format. Live reachability and whether you allow AI crawlers is covered by Express Check.
How it works
- Open https://yourdomain.com/llms.txt in your browser and copy everything.
- Paste it into the box below.
- Fix anything marked ✕ or !, then check again.
Where do I find my llms.txt?
Open https://yourdomain.com/llms.txt in your browser (swap in your own address) and copy everything you see into the box below.
See a 404 or a blank page? You don’t have one yet — create it with the generator.
Validation results
- File is not empty
- Has an H1 title (# Name)
- Has a one-line summary (> …)
- Has at least one section (## …)
- Has markdown links to pages
- No HTML tags (markdown only)
Paste your llms.txt content to see the checks.
This checks file structure only. It does not guarantee AI citation or ranking — inclusion is decided by each platform.
Want to check whether AI crawlers can actually reach your file and pages?
Run the diagnostic