Tools
llms.txt Validator
Paste or fetch /llms.txt for a health score. Local paste; URL fetch is server-side only.
Run a check to see score and issues.
What it checks
llms.txt is a root Markdown map for AI systems (since 2024). This linter flags structure that is hard to parse.
H1 title
One clear project or site name.
Summary
A > blockquote under the H1.
Sections
Markdown links under ## headings.
Descriptions
Each link ends with : short context.
Optional
## Optional stays last when present.
Expected format
# Example Project > A one-sentence summary of the site for AI systems. ## Docs - [Getting started](https://example.com/start): setup guide - [API reference](https://example.com/api): full reference ## Optional - [Changelog](https://example.com/changelog): release history
Common misses: no H1, empty sections, links without : description, Optional not last.
FAQ
Where should llms.txt live?+
At your domain root, e.g. https://example.com/llms.txt.
llms.txt vs robots.txt?+
robots.txt controls crawler access. llms.txt is a curated Markdown map of pages you want AI systems to understand.
Validator vs checker?+
Same job: confirm structure and useful link descriptions.
Is paste private?+
Yes. Pasted text stays in your browser. URL mode only fetches the public file.
Building in public?
Launch on MakerHunt. Free badge crawl or paid skip-queue.