Free tools
Check it like a crawler would.
Paste-in validators check syntax. These tools fetch the live site with a crawler user-agent and evaluate the same public files and access rules AI crawlers encounter. Free, no signup, honest about what each check can and cannot prove.
llms.txt reality check
Most validators only inspect pasted text. We fetch your deployed /llms.txt with a crawler user-agent and test the HTTP response, accessibility, structure, and links.
Open the toolAI crawler access checker
Can ChatGPT actually see this page? One row per AI crawler, current and legacy agents, with the exact robots.txt rule that decides each.
Open the toolMaintained by Paul, founder of Citevera · Methodology discipline: every stat we cite, sourced and framed · Sources last reviewed 2026-08-04