Tools / AI crawlers & agents
Check your llms.txt
Fetch and validate /llms.txt and /llms-full.txt against the llmstxt.org format, with plain fixes for anything missing.
Free, no signup.
Example result: vercel.com · checked 2026-09-30
llms.txt
| /llms.txt | ✓ found · 4.7 KB |
| Title (# heading) | Vercel |
| Summary (> line) | Vercel is a cloud platform for building, deploying, and scaling web applications and AI workloads. |
| Sections (##) | 9 |
| Links | 24 |
Why it matters
Coding agents read it
Tools like Cursor and Claude Code fetch llms.txt on docs sites to find the right pages fast.
A broken file is worse than none
Many sites serve their HTML 404 page at /llms.txt. Agents get junk instead of a map.
Keep expectations honest
Ahrefs found 97% of llms.txt files got no requests in 2026. It’s a cheap bonus, not a ranking factor.
What it checks
File exists
Whether /llms.txt returns plain text, not an HTML error page.
Title
A single “# Site name” heading at the top.
Summary
A one-line “> summary” right after the heading.
Sections
How many “##” sections organise your links.
Links
Markdown links to your key pages.
llms-full.txt
Whether the full-content companion file exists.
How it works
Enter a URL
A domain or page address. No install, nothing to add to your site.
We fetch it live
Our servers request the page read-only, the way a crawler would.
Read and fix
Get the results in seconds, with what each one means.
Questions
More in AI crawlers & agents
Check everything at once
The site audit checks your whole site and scores SEO, AI Search and Agent Readiness in about 30 seconds.
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