Free Robots.txt Validator
Test whether your robots.txt lets AI crawlers like GPTBot, ClaudeBot, and PerplexityBot reach your pages. The Free Robots.txt Validator is 100% free — enter your URL, and we send the full report straight to your inbox.
What is the Free Robots.txt Validator?
The Free Robots.txt Validator fetches your robots.txt and checks whether AI crawlers — GPTBot, ChatGPT-User, ClaudeBot, PerplexityBot, and Google-Extended — are allowed, blocked, or unmentioned. It also verifies your sitemap reference and flags rules that quietly hide you from AI search. Results are emailed to you.
What the Free Robots.txt Validator checks
- Whether robots.txt exists and parses correctly
- Access for each major AI bot: GPTBot, ChatGPT-User, ClaudeBot, PerplexityBot, Google-Extended
- Traditional crawlers: Googlebot and Bingbot
- Whether a sitemap.xml is declared and reachable
- Overly broad Disallow rules that block AI discovery
- Meta robots and X-Robots-Tag directives that conflict with robots.txt
How it works
- 1
Enter your URL
Paste any page on your domain — we read robots.txt from the root.
- 2
We test every AI bot
We evaluate each crawler individually against your rules to see who can reach you.
- 3
Get your report by email
You receive a per-bot allowed/blocked breakdown and the fixes to unblock AI search.
Frequently asked questions
Which AI crawlers should robots.txt allow?
To be discoverable in AI search, most sites allow GPTBot and ChatGPT-User (OpenAI), ClaudeBot (Anthropic), PerplexityBot (Perplexity), and Google-Extended (Google AI). Blocking them removes you from those engines.
Will this change my robots.txt?
No. The tester only reads and evaluates your existing robots.txt. It shows you exactly which rules to change, but never modifies your site.
What happens if I block GPTBot?
If GPTBot is disallowed, OpenAI’s crawler will not index your pages, so ChatGPT and SearchGPT are far less likely to cite or recommend your site.
Is the Free Robots.txt Validator really free?
Yes. You can scan a website at no cost and receive the full report by email. There is nothing to install and no credit card required.
Also known as
The same free tool, by the names people search for it:
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