AI visibility tools — free forever.
Five free tools, published and maintained by VisibAI, that check how AI assistants see a website. No signup, no email, no payment.
llms.txt Generator
Generate a llms.txt file for your website — tells AI crawlers what your site is about and how to index it.
AI Crawler Checker
Fast yes/no check of whether GPTBot, PerplexityBot, ClaudeBot, Bingbot and Google-Extended can read your site, with a live homepage fetch for each.
Robots.txt AI Bot Checker
Detailed check of your robots.txt against 12 AI bots. See exactly which crawlers are blocked and which are allowed.
Query Fan-Out Generator
See how ChatGPT, Perplexity and Google AI fan a single query into 8-15 sub-queries. Great for content briefs and SEO planning.
Industry AI Visibility Index
See the average AI visibility score by industry, the most common issues, and where any score ranks. Aggregated and anonymous.
What are these tools for?
AI assistants such as ChatGPT, Perplexity, Claude and Gemini answer millions of buying questions a day, and they can only mention websites their crawlers can read and understand. The VisibAI free tools check those technical preconditions one at a time: whether the AI crawlers are allowed in, whether the site describes itself in a machine-readable llms.txt file, which hidden sub-queries an assistant derives from a question, and how whole industries score on AI visibility today.
What the free tools do not tell you
Passing every check here means AI assistants are able to read a site, not that they actually recommend it. Measuring the outcome takes a different instrument: the full VisibAI audit asks the assistants real customer questions and reports how often the business is named, scored from 0 to 100.
Frequently asked questions
What are the VisibAI free AI visibility tools?
The VisibAI free tools are five browser-based checks published by VisibAI: an llms.txt generator, an AI crawler checker, a robots.txt AI bot checker, a query fan-out generator, and an industry AI visibility index. Each one runs without signup and answers one specific question about how AI assistants see a website.
What is AI visibility?
AI visibility is how often a business appears in AI-generated answers when people ask assistants such as ChatGPT, Perplexity, Claude or Gemini about its market. It is the AI equivalent of ranking in a search engine: if the assistants never mention a brand, that brand is invisible to everyone who asks them.
Do the free tools require an account or an email address?
No. Every VisibAI free tool runs directly in the browser without signup, without an email address and without payment. The optional email form on the tools page only joins a contact list; it does not unlock anything.
Which tool should I start with?
Start with the AI Crawler Checker: it answers in seconds whether GPTBot, PerplexityBot, ClaudeBot, Bingbot and Google-Extended are allowed to read a site at all. If a crawler is blocked, nothing else matters until that is fixed, because an assistant cannot cite what its crawler cannot read.
What is the difference between the free tools and the VisibAI audit?
The free tools check technical preconditions: whether AI crawlers can access a site and whether files like llms.txt exist. The full VisibAI audit measures the outcome: it asks ChatGPT, Perplexity, Claude, Gemini, Mistral and You.com real customer questions and reports how often the audited business is actually named, scored from 0 to 100.
Who publishes these tools?
VisibAI publishes and maintains all of the free tools on this page. VisibAI is an AI visibility audit product, founded in 2026, that measures how businesses appear across ChatGPT, Perplexity, Claude, Gemini, Mistral and You.com.
Published and maintained by VisibAI. Last updated 22 August 2026.