isvisible.ai is a free AI visibility audit tool that checks whether major AI crawlers and assistants can access your website. It analyzes your robots.txt and llms.txt files and runs live probes against 13 AI crawlers across search engines, training bots, and answer engines. The tool delivers an instant 0-100 score with an agent-by-agent access map showing which platforms are allowed or blocked. No account or credit card is required, and results are returned in seconds.