Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko compatible Googlebot/2.1 +) Chrome/ W.X.Y.Z Safari/537.36.Mozilla/5.0 (compatible Googlebot/2.1 +).Mozilla/5.0 (iPhone CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible AdsBot-Google-Mobile +) Mozilla/5.0 (Linux Android 5.0 SM-G920A) AppleWebKit (KHTML, like Gecko) Chrome Mobile Safari (compatible AdsBot-Google-Mobile +) Learn how to verify if a visitor is a Google crawler.Ĭhecks Android web page ad quality. The full user agent string is a full description of the crawler, and appears inĬaution: The user agent string can be spoofed. This list is not complete, but covers most of the crawlers you might see on your One token, as shown in the table you need to match only one crawler token for a rule toĪpply. To match a crawler type when writing crawl rules for your site. The user agent token is used in the User-agent: line in robots.txt The following table shows the crawlers used by various products and services at Google: Is used to automatically discover and scan websites by following links from one webpage toĪbout the common Google crawlers you may see in your referrer logs, and how to specify them in
"Crawler" (sometimes also called a "robot" or "spider") is a generic term for any program that Overview of Google crawlers (user agents)
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