llms.txt Validator
Already have an llms.txt? Check in seconds whether it is built correctly. You get a score, a grade and concrete tips on what to improve.
Why should I check this?
An llms.txt is only useful if it is built correctly and reachable. The validator shows you where you stand:
See at a glance what is missing or wrong: from reachability to encoding.
A clear rating from 0 to 100 points and a grade make the status immediately understandable.
A correctly structured, reachable file can be read by software and AI systems without workarounds.
Check domain
Enter your domain and we automatically fetch /llms.txt and evaluate it.
/llms.txt automatically.What gets checked?
Nine criteria together make up the total score of 100:
| Criterion | Check | Points |
|---|---|---|
| Reachability | HTTP 200 at /llms.txt | 20 pts |
| Title | # Markdown heading on line 1 | 15 pts |
| Description | > blockquote short description | 15 pts |
| Sections | ## headings (full from 4) | 15 pts |
| Links | Markdown links (full from 5) | 15 pts |
| Content type | text/plain or text/markdown | 5 pts |
| File size | 100 Bytes to 500 KB | 5 pts |
| UTF-8 | Correct encoding | 5 pts |
| llms-full.txt | Reference present & reachable | 5 pts |
No llms.txt yet? Create one with the generator. For programmatic use, the REST API is available.
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