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

What AIclicks' robots.txt checker is

Most free robots.txt checkers are a hand-rolled parser and a list of bot names. AIclicks' Free Robots.txt Checker stakes its identity on not being that: it runs your live file through Google's open-source robots.txt parser, the same RFC 9309 implementation Googlebot uses, and returns a per-crawler verdict (allowed, blocked, or affected by a conflicting rule) in about a second. It belongs in the "AI bot checker" category because the crawlers it foregrounds aren't just the classic SEO ones; they're the agents that feed generative search.

On the robots.txt tool's own page, which we re-read on August 27, 2026, 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 syntax errors, invalid wildcards, conflicting Allow/Disallow rules, unknown directives, and a missing Sitemap declaration. Using Google's parsing library is what makes those verdicts trustworthy: wildcards and rule conflicts get resolved the way the live crawler resolves them, not the way a quick regex guesses.

Cost of entry: none. The page's standing promise is "No signup required — use any tool instantly": no login, no email, no gate.

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 ("Free, unlimited, no signup," per its page) covering a noticeably wider AI-bot set: GPTBot, ChatGPT-User, ClaudeBot, PerplexityBot, Google-Extended, CCBot, Applebot-Extended, Bytespider, and Amazonbot. This one goes further than reading the file: it fetches your robots.txt, then attempts a GET request with each crawler's user-agent and grades the server's answer as allowed, disallowed (naming the blocking rule), or soft-blocked, which surfaces blocks that never appear 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 the free checkers withhold, and what the paid platform charges for

Short answer: the checkers themselves withhold nothing. Both the Robots.txt Checker and the AI Crawlability Checker are complete, uncapped tools: the crawlability page states "Free, unlimited, no signup" outright, and neither page gates a result behind an account. The funnel is visible (the tool pages carry "Start Free Audit" and "Book a Demo" calls-to-action, plus a Google login button for the platform) but it never blocks the check you came for.

What AIclicks charges for is the layer the checkers can't reach: watching what the AI engines actually say about you. We pulled the pricing page on August 27, 2026, and the paid platform breaks down like this: Starter at $59/month buys 30 tracked prompts across 3 LLMs, 4,650 LLM responses analyzed per month, one website and one country; Pro at $189/month raises that to 150 prompts, 4 LLMs, 18,600 responses and unlimited websites; Business at $499/month covers 300 prompts, 6 LLMs and 55,800 responses; Enterprise is custom. Starter and Pro carry a 3-day free trial with no card required.

Two things about that seam are worth registering. First, the split is honest: the free tools answer the access question completely, and the subscription starts only where the question changes to visibility. You are never paying to finish a robots.txt check. Second, one gap the tool pages leave open: neither checker page publishes any statement about logging or retention of the domains you submit. Nothing suggests misuse; the pages simply don't address it. So an unlaunched or client domain deserves the same discretion here you'd apply to any third-party web tool.

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

The check AIclicks performs is the cheap, high-leverage kind of maintenance: an accidental AI-bot block (a copied robots.txt snippet, a CDN preset someone toggled) silently costs a site its chance of being read by the answer engines, and a one-second parse catches it. AIclicks is right to frame that as a real lever.

Precision about what the verdict covers matters just as much, though. The parser's output describes your file, and three gaps stand between the file and an actual appearance in an AI answer:

• An allowed crawler still has to choose to visit you, index what it finds, and cite it; the file compels none of that.
• Enforcement can live where the file can't see it. A WAF rule, a server-level 403, or an IP block will stop a bot the file welcomes; the companion crawlability tool's per-user-agent GET is AIclicks' own partial answer to this, since it tests the server's real response rather than its stated policy.
• The file itself is a posted notice, not a lock. Compliance is voluntary, and not every AI agent honors it.

An "allowed" verdict therefore retires one specific failure mode, nothing more and honestly nothing less. Whether your pages then actually surface in ChatGPT, Claude or Perplexity answers is a question for visibility tracking, which is the product AIclicks sells behind these free tools.

Where AIclicks stops being enough

Scale is the first wall: the free checker takes one live domain per run, with no bulk input and no stored history, so auditing a portfolio or watching for regressions after each deploy means manual repetition (or a platform-grade tool like the Apify Actor we review separately). Depth is the second: because it parses the file rather than probing your stack, a clean verdict still leaves your CDN and WAF settings unexamined. Run the companion crawlability checker, and your own edge-config review, before declaring the site open. And if the question you care about has shifted from "can the bots read me" to "do the answers mention me," no robots.txt tool of any kind is the instrument; that's tracking-product territory.

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, read an "allowed" verdict as one failure mode retired rather than visibility achieved, and go in knowing the checkers are the free floor of a paid GEO platform. For the AI bot-blocking check itself, it's a solid 3.8/5. For how it stacks up against the free field, including our top-pick checker, Is My Brand In AI, see our AI bot checker cluster.