For Marketers · Free Tool
Your site, legible to machines.
Buyers increasingly ask AI assistants before they ask search engines, and llms.txt is the file that tells those AIs what your site actually contains. Paste a domain: if it has no llms.txt we generate a starter file from its real pages, and if it already has one we grade it. Free, no email, no signup.
Reads up to 7 public pages of the site. AI writes only the descriptions; every link comes from pages that actually exist. Results cached for a day.
Your llms.txt, graded
0/ 100
Reference implementation: zrev.ai/llms.txt (this grader scores it 100).
Your starter llms.txt
Now what? Host this file at yourdomain.com/llms.txt (any static host can serve it), review the descriptions, and expand it as your site grows. Ours is live at zrev.ai/llms.txt if you want a fuller reference.
What Is llms.txt
A plain-markdown file at your site's root that gives AI systems a curated map: what you are, which pages matter, what each covers. Think robots.txt, but for comprehension instead of permission. ChatGPT, Claude, Perplexity and the crawlers behind them increasingly use it to answer questions about companies, and the sites that publish one get described accurately instead of guessed about.
It is one piece of AEO (answer-engine optimization). zRev practices what it generates: our own llms.txt, a public MCP server AI agents can query directly, and structured data across the site. If you want this thinking applied to your whole GTM, start with the AEO Audit.
In Your Browser
zRev AEO LensFree Chrome extension
The same engine, one click away on any site. Run it on your own homepage first, then on three competitors, then on a prospect before the call. No account, nothing tracked.
- AEO readiness score out of 100
- llms.txt grade and schema types
- AI crawler access
- The cold read of the homepage
Legible to machines is step one.
The audit tells you what ChatGPT, Claude and Perplexity say about you today, where competitors show up instead, and what to fix first. Fixed scope, about a week.