GEO & AI Visibility Checker — Marketing Signals

Instant GEO/AEO check: AI crawler access, schema, quotability and llms.txt. Free, no sign-up, runs locally in your browser.

What's new in 1.1: more reliable on sites behind Cloudflare and similar security, an honest "couldn't read" state when a site blocks the check, and a one-tap Recheck button. Can AI find, trust and quote your website? Click once and find out. People increasingly get answers straight from ChatGPT, Gemini, Perplexity and Google's AI Overviews — without clicking a single link. If those systems can't read your site, can't work out who you are, or can't pull a clean quote from your page, you simply won't be in the answer. GEO & AI Visibility Checker gives you a 30-second snapshot of your AI visibility on any page, free. It runs four checks plus a content-rendering safety net, entirely inside your browser. WHAT IT CHECKS 1. AI crawler access Reads the site's robots.txt and shows a clear green/red grid of which AI crawlers are allowed in — GPTBot and OAI-SearchBot (OpenAI), ClaudeBot (Anthropic), PerplexityBot, Google-Extended (Gemini), Applebot-Extended, CCBot and Bytespider. Accidentally blocking the crawlers you want to be cited by is the most common GEO own-goal. This catches it. 2. Structured data and entity signals Scans the page's structured data for the markup language models lean on — Organization, Article, FAQPage, Author and sameAs — and flags what's missing. The real question isn't "do you have schema," it's "can a model work out who you are and decide to trust you." 3. Quotability Scores how easy your page is to lift a clean answer from, out of 100: a single clear H1, logical sectioning, lists, tables, direct-answer paragraphs, readable sentence length and enough depth to be useful. 4. llms.txt Checks for llms.txt and llms-full.txt — the emerging standard that tells language models what matters on your site. PLUS: a JavaScript-rendering safety net If your content only appears after JavaScript runs, AI crawlers that read raw HTML may see a near-empty page — even though it looks full to you. The checker compares the raw HTML against the rendered page and warns you the moment there's a gap, so you never get a false clean bill of health. WHY IT'S DIFFERENT - No sign-up, ever. Install it and use it. No account, no email wall, no API key. - No scan limits. Check as many pages as you like. Free forever. - Minimal permissions. It only reads the tab you're on, the moment you click the icon. There's no "read and change all your data on all websites" access, because it doesn't need it. - Nothing leaves your browser. Every check runs locally. No analytics, no tracking, no servers, nothing stored, nothing sold. - Honest results. The rendering safety net means it won't tell you you're fine when a crawler would see an empty page. You can copy a plain-text summary of any result to share with your team or client in one click. WHO IT'S FOR SEO and GEO professionals, content teams, web developers, and any business owner who wants to know whether AI search can actually see their site. The extension is the free 30-second snapshot. When you're ready to fix what it surfaces across your whole site — with citation tracking and a prioritised plan — that's what the Marketing Signals GEO and LLM visibility service is for. A free tool by Marketing Signals. Questions? hello@marketingsignals.com