llms.txt Validator
Paste an llms.txt file to check its headings, summary, resource links and proposed Markdown structure.
Validate the proposed llms.txt format
This validator checks the structural rules described by the llms.txt proposal: a single H1 name, an optional blockquote summary, Markdown details, H2 sections and linked resource lists.
A structurally valid file is not necessarily useful. Review every description, keep links authoritative and avoid treating llms.txt as an access-control or AI-training policy file.
How to use the llms.txt Validator
- Paste the full llms.txt Markdown.
- Review heading, link and section-structure messages.
- Correct the source and manually verify every linked resource.
Practical example
Keep one clear project heading followed by curated documentation links with useful descriptions.
What this tool cannot guarantee
The validator checks the proposed format locally; it does not request URLs or guarantee adoption by AI systems.
Continue this workflow with the llms.txt Generator
Read the Practical llms.txt Guide for implementation guidance and common limitations.
Frequently asked questions
What does this validator check?
It checks the pasted Markdown structure, absolute resource URLs, headings, descriptions and the placement of the Optional section.
Does it check whether URLs work?
No. This local validator does not request the URLs or upload the file.
Is llms.txt the same as robots.txt?
No. robots.txt provides crawler access directives, while llms.txt is a proposed curated content guide for language models.