Updating the user agent of Googlebot

Ecompromo | October 2, 2019 | SEO Resources

Googlebot uses a Chrome-based browser to render webpages, as we announced at Google I/O earlier this year. As part of this, in December 2019 we’ll update Googlebot’s user agent strings to reflect the new browser version, and periodically update the version numbers to match Chrome updates in Googlebot.

See Google crawlers (user agents) and Make sure Google can index JavaScript for background reading about user agent strings and rendering.

Googlebot user agents today


Mobile:
Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.96 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

Desktop:
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

OR

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Safari/537.36

The new evergreen Googlebot and its user agent

In December we’ll start periodically updating the above user agent strings to reflect the version of Chrome used in Googlebot. In the following user agent strings, “W.X.Y.Z” will be substituted with the Chrome version we’re using. For example, instead of W.X.Y.Z you’ll see something similar to “76.0.3809.100“. This version number will update on a regular basis.

Mobile:
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; Googlebot/2.1; +http://www.google.com/bot.html)

Desktop:
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

OR

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/W.X.Y.Z Safari/537.36

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