AIclicks Free Robots.txt Checker Review (2026): Which AI Crawlers, Real Parser, No Signup

What AIclicks' robots.txt checker is

AIclicks' Free Robots.txt Checker is a single-purpose web tool: you paste a domain, it fetches that site's live robots.txt, and it returns a per-crawler verdict — allowed, blocked, or affected by a conflicting rule — in about a second. It sits in the "AI bot checker" category because its pitch isn't just classic SEO crawlers; it specifically calls out the AI crawlers that feed generative search.

On the robots.txt tool's own page, that AI list is GPTBot (OpenAI), ClaudeBot (Anthropic), Perplexity-User, and OAI-SearchBot, shown alongside the traditional Googlebot, Googlebot-Image, and Bingbot. Beyond the per-bot verdict, it does genuine validation work: it flags invalid wildcards, conflicting Allow/Disallow rules, unknown directives, and a missing Sitemap declaration. The headline technical claim is that it parses your file with Google's open-source robots.txt parser (the RFC 9309 implementation Googlebot uses), which is the right way to do this — it means the verdict reflects how a real crawler resolves the file, not a hand-rolled approximation.

The tool is free and requires no signup, login, or email.

The two-tool detail most reviews miss

AIclicks actually ships two adjacent free tools, and they are not the same:

• Robots.txt Checker — validates the file and names four AI crawlers (above). Its job is "is your robots.txt correct, and what does it say about these bots."
• AI Crawlability Checker — a separate free tool that covers a noticeably wider AI-bot set: GPTBot, ChatGPT-User, ClaudeBot, PerplexityBot, Google-Extended, CCBot, Applebot-Extended, Bytespider, and Amazonbot. Per its page, this one goes further than reading the file — it attempts a GET with each crawler's user-agent and checks the server response, which catches blocks that don't live in robots.txt at all.

This matters for an honest verdict. If you only run the robots.txt tool and you care about, say, Google-Extended (Gemini's training/grounding agent), CCBot (Common Crawl, which feeds many models), or Applebot-Extended, you won't see them — they're on the companion tool. The robots.txt checker is accurate within its scope; the scope is just narrower than the platform's full AI-bot coverage. We score "bots covered" against that narrower tool, which is the one this review's URL points to.

Disclosure

AI Tools Police earns affiliate commissions when readers sign up for some tools we cover. That never changes a score, a feature finding, or whether we surface a weakness. We sell no GEO platform and no crawler checker of our own. Worth being explicit here: AIclicks' free checkers are lead-gen for its paid AI-visibility product (roughly $59–$499/mo), so the free tools come wrapped in upsell framing. That's a normal model — we just want you to know the free tool is the front door to a paid platform, and we rate the free tool on its own merits.

How we reviewed this

This is a research-based review, not a fabricated hands-on test. We examined AIclicks' two tool pages and corroborating public sources, and we have not invented a screenshot, a benchmark, or a "we tested N sites" metric. The bot lists, the "no signup" claim, and the RFC 9309 / Google-parser detail are reported as AIclicks states them on its pages — accurate as documentation, not as our own controlled measurement. Where we were unsure (exact platform pricing tiers), we've kept the figures approximate and flagged them. Pricing and bot lists are the kind of thing vendors change, so verify against the live tool before relying on a specific number.

What a robots.txt check can and can't tell you (the GEO point)

For generative engine optimization, confirming AI crawlers aren't blocked is a real and underrated lever — many sites block two to four major AI bots without realizing it, often from a copied robots.txt snippet or a Cloudflare default AI-bot-block preset. Catching that is cheap and high-impact. AIclicks is right to frame it that way.

But it's worth stating the limit plainly: not being blocked is necessary, not sufficient. A robots.txt checker tells you what your file permits. It does not tell you:

• Whether a crawler actually visits, indexes, or cites you.
• Whether something other than robots.txt is blocking the bot — a Cloudflare/WAF rule, a server-level 403, or an IP block. (The companion crawlability tool's per-user-agent GET catches more of this than the robots.txt parser alone.)
• Whether a given crawler even honors robots.txt — compliance is voluntary, and not every AI agent respects it.

So treat an "allowed" verdict as clearing a prerequisite, not as proof of AI visibility. The check that answers "am I actually showing up in ChatGPT/Claude/Perplexity answers" is a different category of tool — a visibility tracker, which is exactly what AIclicks' own paid platform (and incumbents like Is My Brand In AI) are built to do.

Where AIclicks stops being enough

The free robots.txt tool checks one live domain at a time, with no bulk mode and no historical tracking — fine for a one-off audit, limiting if you manage many sites or want to watch for regressions after a deploy. And because it reads the file rather than your whole stack, it's a first-pass diagnostic: a clean verdict here still warrants a look at your CDN/WAF settings. If your real question is "is my brand being surfaced and cited in AI answers over time," you've outgrown any robots.txt checker and want a tracking product instead.

Verdict

AIclicks' Free Robots.txt Checker is a genuinely good free tool for its job: no signup, fast, and — because it uses Google's open-source parser — accurate about what your robots.txt actually says for the crawlers it covers. Its honest weakness is scope on this specific tool: only four AI crawlers are named here, with the wider list (Google-Extended, CCBot, Applebot-Extended, Bytespider, Amazonbot and more) sitting on AIclicks' companion AI Crawlability Checker. Use both, treat an "allowed" result as a prerequisite rather than a visibility guarantee, and remember the free tools are the front door to a paid GEO platform. For the AI bot-blocking check itself, it's a solid 3.8/5. For ongoing AI visibility tracking, see our Is My Brand In AI review and the rest of our AI bot checker cluster.