llms.txt validator
Paste an llms.txt or fetch one from a domain — we lint structure, sections, and link formatting.
Fetch from a domain (optional)
Looks valid
- H1 title found: "Example Co"
- Summary blockquote present.
- 2 section headings (##).
- 3 links found.
- All link lines are well-formed.
- All links have descriptions.
Save this & monitor your AI visibility over time
llms.txt is one signal. See your full Index & AI Health Score — index coverage, crawlability, AI-crawler access and llms.txt in one place — and get alerted when anything changes.
Run a full Index & AI Health scanRelated free tools
AI citation & brand mention checker
See whether AI models would cite your domain, and which off-site brand signals you're missing.
AI Crawler Access Checker
Check whether ChatGPT, Claude, Perplexity, and other AI crawlers can crawl your site.
Discoverability Score
0–100 score for any domain across Google and AI search.