What is the name of the Google PageSpeed User Agent?

user-agent google-pagespeed
Matty B picture Matty B · May 6, 2013 · Viewed 18.6k times · Source

This page indicates that it uses a custom user agent but it does not mention the name. I would like to be able to run some logic if the user agent is from PageSpeed. What is the name of the Google PageSpeed user agent?

Answer

Mage2.PRO picture Mage2.PRO · Nov 23, 2018

The information in other answers is outdated: currently, Google PageSpeed does not pass the «Google Page Speed Insights» string in its User-Agent HTTP header, it passes the «Chrome-Lighthouse» string instead.
An example:

Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5 Build/MRA58N) AppleWebKit/537.36(KHTML, like Gecko) Chrome/69.0.3464.0 Mobile Safari/537.36 Chrome-Lighthouse

Please note that the string is exactly «Chrome-Lighthouse» even if you run Google PageSpeed in other browsers (e.g. Firefox).

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