Google-InspectionTool

search-engine Google-InspectionTool

Google's inspection tool bot for testing and debugging search indexing

About this crawler

Google-InspectionTool is a web crawler identified by the regular-expression pattern Google-InspectionTool in the User-Agent request header. It is categorised as search-engine. Use the regex above to detect, log, allow, or block Google-InspectionTool traffic in your web server, CDN edge rules, or robots.txt.

Block-rate · top 25k sites

0.065%

latest snapshot
2026-06-04
matched key: Google-InspectionTool

Technical details

Name: Google-InspectionTool
Pattern: Google-InspectionTool
Tags: search-engine
Reference: https://developers.google.com/crawling/docs/crawlers-fetchers/overview-google-crawlers
rDNS suffixes: .1e100.net, .googlebot.com, .googleusercontent.com
Instances: 2 known sample(s)

rDNS verification (FCrDNS)

Verify a request is genuinely Google-InspectionTool with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.

.1e100.net
.googlebot.com
.googleusercontent.com

Sample User-Agent strings

Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/W.X.Y.Z Mobile Safari/537.36 (compatible; Google-InspectionTool/1.0)

Mozilla/5.0 (compatible; Google-InspectionTool/1.0)

Block this crawler

robots.txt — disallow Google-InspectionTool:

User-agent: Google-InspectionTool Disallow: /

Apache .htaccess — return 403:

RewriteEngine On RewriteCond %{HTTP_USER_AGENT} Google-InspectionTool [NC] RewriteRule .* - [F,L]

Nginx — return 403 inside a server block:

if ($http_user_agent ~* "Google-InspectionTool") { return 403; }

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