AI Visibility Checker

Free AI visibility checker. See if ChatGPT, Claude, Perplexity & Gemini can access your site: get a 0–100 score, an agent-by-agent access map of 13 AI crawlers, llms.txt & sitemap signals, and fixes, no signup.

Built and maintained by Shehzad Munir ·

Needs the internet: your robots.txt and llms.txt are fetched on our server. Nothing is stored after the request.

AI Visibility Checker
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  • Free · No sign-up
  • Uses the internet
  • 8 features
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<a href="https://www.toolnova.org/seo-tools/ai-visibility-checker">AI Visibility Checker</a> by ToolNova

APA

ToolNova. (2026, September 23). AI Visibility Checker [Online tool]. https://www.toolnova.org/seo-tools/ai-visibility-checker

MLA

“AI Visibility Checker.” ToolNova, 23 Sept. 2026, www.toolnova.org/seo-tools/ai-visibility-checker.

Are you visible where people now search: inside AI?

Check whether ChatGPT, Claude, Perplexity, Gemini and the other AI assistants can actually reach your website. Paste your URL for an instant 0–100 AI visibility score with an A–F grade, a live agent-by-agent access map across 13 search, training and answer-engine crawlers, llms.txt and sitemap signals, and a prioritized fix list, plus a built-in llms.txt generator to close the gaps. Free, no signup, and every result is measured live from your real robots.txt and page headers.

More and more searches never reach a results page, people ask ChatGPT, Claude, Perplexity or Google's AI Overviews and read the answer directly. If those assistants can't crawl your site, you simply don't exist in that answer, no matter how well you rank in classic search. This checker probes your domain the way those engines do and tells you, in seconds, whether each one can actually reach your content.

Features

  • 0–100 AI visibility score with an A–F grade
  • Live access map for 13 crawlers (search, training & answer engines)
  • Real robots.txt parsing per user-agent (Allow/Disallow, longest-match)
  • Detects llms.txt, llms-full.txt, sitemap, meta robots & X-Robots-Tag
  • Prioritized, plain-English fix list for every blocked bot
  • One-click robots.txt snippet to allow the AI engines you want
  • Built-in llms.txt generator to fix a missing AI index
  • Copy or download a full report, everything measured live, no signup

How to use AI Visibility Checker

  1. 1

    Enter your website URL

    Paste your domain (example.com) and click Check. No signup, no login, no crawling of anyone's private data, just your public robots.txt and homepage.

  2. 2

    Read your AI visibility score

    See your 0–100 score and A–F grade, then the agent-by-agent map showing which of the 13 search, training and answer-engine crawlers can reach your site.

  3. 3

    Work through the fixes

    Each blocked bot and missing signal (llms.txt, sitemap, noindex) becomes a prioritized recommendation. Copy the robots.txt snippet to allow the AI engines you want.

  4. 4

    Generate an llms.txt & re-check

    If you're missing an llms.txt, generate one from your sitemap in a click, publish it and both files at your site root, then re-run the check to confirm your score improved.

Common use cases

  • Find out if ChatGPT, Claude, Perplexity and Gemini can crawl your site
  • Diagnose why your brand never appears in AI answers or AI Overviews
  • Audit robots.txt for an accidental block on AI or search crawlers
  • Check a whole site for a stray noindex or X-Robots-Tag before a launch
  • Prove to a client or team that a site is (or isn't) AI-ready
  • Generate a missing llms.txt to make a site visible to AI answer engines

Detailed guide

An agent-by-agent access map, not a vague score

Paste your URL and the tool fetches your live robots.txt and evaluates 13 real user-agents against it, grouped into Search Engines (Googlebot, Bingbot), AI Training Crawlers (GPTBot, ClaudeBot, Google-Extended, CCBot, Bytespider, Applebot-Extended, meta-externalagent) and AI Answer Engines (ChatGPT-User, OAI-SearchBot, Claude-User, PerplexityBot). Each one is marked Allowed or Blocked using the same longest-match, allow-wins-on-tie logic search engines use, so the map reflects exactly what those bots see.

The signals that decide AI visibility

Beyond robots.txt, the checker looks for the files and directives that make or break AI discovery: an llms.txt (the emerging AI index), llms-full.txt, a sitemap.xml, and any noindex hiding in your homepage meta robots tag or X-Robots-Tag header. A single stray 'Disallow: /' or a leftover noindex can quietly wall your whole site off from AI, this surfaces it immediately.

A transparent score, then a clear fix list

Your 0–100 score is a deterministic rollup, crawler access is worth 80 points, a published llms.txt is worth 20, with a penalty if the homepage is set to noindex. Nothing is invented; the same site always scores the same. Every blocked crawler and missing signal becomes a prioritized, plain-English recommendation, and the tool hands you a ready-to-paste robots.txt snippet that allows the exact AI engines you choose.

Fix a missing llms.txt without leaving the page

The most common gap this tool finds is a missing llms.txt. So it's built in: if you don't have one, generate a valid llms.txt straight from your sitemap in a click, then copy or download it and upload it to your site root. Re-run the check and watch your score climb. It's the fastest path from 'invisible to AI' to fully crawlable and indexed.

Frequently asked questions

What is an AI visibility checker?

It's a tool that tests whether AI assistants like ChatGPT, Claude, Perplexity and Google's Gemini can actually access and crawl your website. It reads your live robots.txt, checks each AI user-agent, looks for an llms.txt and sitemap, and gives you a 0–100 visibility score with specific fixes.

How do I check if ChatGPT or Perplexity can access my website?

Paste your URL and click Check. The tool evaluates the exact crawlers those engines use, ChatGPT-User and OAI-SearchBot for ChatGPT, PerplexityBot for Perplexity, ClaudeBot and Claude-User for Claude, Google-Extended for Gemini, against your robots.txt rules and shows Allowed or Blocked for each.

Which AI crawlers does it check?

13 in total, across three groups. Search Engines: Googlebot, Bingbot. AI Training Crawlers: GPTBot, ClaudeBot, Google-Extended, CCBot, Bytespider, Applebot-Extended, meta-externalagent. AI Answer Engines: ChatGPT-User, OAI-SearchBot, Claude-User, PerplexityBot.

How is the AI visibility score calculated?

It's a transparent, deterministic rollup: crawler access is worth up to 80 points (the share of the 13 agents your robots.txt allows) and a published llms.txt is worth 20 points, with a small penalty if your homepage carries a noindex directive. The same site always produces the same score, nothing is randomized.

Why would AI assistants be blocked from my site?

The usual causes are a robots.txt rule (a 'Disallow: /' under 'User-agent: *' or a named AI bot), a leftover noindex in your meta robots tag or X-Robots-Tag header, or a firewall/CDN rule. This checker pinpoints which of these is blocking each crawler so you can fix the right one.

How do I make my website visible to AI?

Allow the AI crawlers you want in robots.txt (the tool gives you a ready-to-paste snippet), remove any accidental noindex, publish a sitemap.xml, and add an llms.txt summarising your site. You can generate a valid llms.txt right inside this tool and then re-check to confirm your score improved.

What is llms.txt and does this tool detect it?

llms.txt is a Markdown file at your domain root that gives AI answer engines a clean summary of your site. Yes, the checker probes for llms.txt and llms-full.txt and, if you don't have one, it can generate a valid llms.txt from your sitemap so you can publish it immediately.

Is allowing AI crawlers good or bad for my site?

It's a strategic choice. Allowing AI answer-engine and training crawlers means your content can be surfaced and cited in ChatGPT, Perplexity, Gemini and AI Overviews, which is increasingly where discovery happens. Some sites prefer to block training crawlers while allowing answer engines. This tool shows both so you can decide deliberately.

Does this tool query ChatGPT or Perplexity to see if my brand is mentioned?

No. It measures crawler access and AI-readiness signals from your own live robots.txt, llms.txt and page headers, everything is real and reproducible. Whether an AI actually mentions your brand also depends on your content, but a site the assistants can't crawl can never be cited at all, which is the gap this tool closes first.

Is the AI visibility checker free and private?

Yes. It's completely free with no signup, and it only reads your site's public files (robots.txt, llms.txt, sitemap) and homepage, the same things any crawler sees. Nothing you enter is stored.

How often should I run an AI visibility check?

Run it after any change to robots.txt, a site migration, a CDN/firewall update, or a big content launch, and periodically as AI crawlers evolve. New AI user-agents appear regularly, so a site that was fully visible last year may have gaps today.

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