Free Robots.txt AI Crawler Checker

See whether search engines and AI crawlers can reach the pages you want discovered. Get a clear report of crawler access, content signals, and the fixes to make first.

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Search & AI crawler access rules

Content signals & blocked paths

Prioritized fix list

Get Your Crawler Access Score Instantly

Enter your domain and get a Crawler Access Score. The report shows search access and AI access broken out separately, so you can see what's open and what's blocked.

See your overall score plus an "open to crawlers" status label
View separate scores for search access and AI access at a glance
Get a prioritized fix list starting with the highest-impact issues
Run up to 3 free checks per day

Crawler Access Score card showing the overall score, the status label (e.g., "Open to crawlers"), and the search access and AI access sub-scores.

Find & Fix Critical Access Issues Fast

Stop guessing. The Fix List puts failed checks first, ordered by their impact on search and AI discoverability, so you know exactly what to tackle first.

Get issues ranked by impact on discoverability
Review each issue and how to fix it
Confirm when no blocking issues are found

Fix List section showing failed checks ordered by impact on search and AI discoverability.

See Which Search and AI Answer Engines Can Reach Your Site

The report checks access for the crawlers behind search results and AI answers, then shows you which ones can reach your pages.

Check access for major search and AI answer engines, including Googlebot, Bingbot, OAI-SearchBot, and PerplexityBot.
See whether each crawler is allowed or blocked
Identify whether rules are explicit or set by default
Confirm key URLs pass a live crawlability test against Googlebot

Search Crawlers section showing Googlebot, Bingbot, Applebot, and DuckAssistBot with allowed or blocked status and rule source.

Check AI Training and Assistant Bot Access

The checker tests access for the bots that train AI models and the assistants that fetch your pages in real time. You'll also see how many AI training opt-outs your robots.txt currently has in place.

Check access for AI training bots like GPTBot, ClaudeBot, CCBot, and more
Review rules for AI assistant bots like ChatGPT-User and Claude-User
See your current AI training opt-out count
Spot missing or thin AI crawler rules

AI Crawlers section showing GPTBot, ClaudeBot, Google-Extended, ChatGPT-User, Claude-User, Perplexity-User, and others with access status and rule source.

Want to Go Deeper? Stop Checking. Start Tracking

The robots.txt Checker gives you a one-time snapshot. Semrush shows you the full picture: track your AI visibility as it trends, monitor your site's health, and see where competitors get cited so you can close the gap.

Track AI visibility across ChatGPT, Gemini, and Perplexity, Google AI Overviews, and more
See which competitors get cited when you don't
Monitor site-wide technical health, not just robots.txt
Turn AI blind spots into your next wins

Robots.txt AI Crawler Checker FAQs

Start with the top items in the Fix List. It's ordered by impact on search and AI discoverability, so failed checks appear before warnings. If no failed checks are found, use the report to confirm your access rules match your intent, especially for AI training and assistant bots. If no failed checks are found, use the report to confirm you're allowing and blocking the right bots on purpose, especially AI training and assistant bots.