Chrome UX (CrUX) reports have become increasingly popular recently. This guide aims to help you understand what these reports are, what they are not, and how to interpret them better. Interestingly, the term "Crux" also refers to the Southern Cross constellation.

What Do the Data in CrUX Reports Mean?

The data in CrUX reports are based on percentiles. This means you can see the percentage of users who fall into specific performance ranges for any given metric. This statistical approach provides the most accurate representation.


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For example, in August 2022, among the thousands of users who visited (the exact number of users is unknown), 58% had a good LCP (Largest Contentful Paint) value, while 20% had a poor LCP value. The CrUX report and PageSpeed Insight report base their reference on the 75th percentile (seen as P75 in the image). The LCP value at P75 is 3500 ms.

Thus, CrUX data provides accurate results based on monthly averages rather than individual user data or single searches.

Sources of Data for CrUX Reports

The data in CrUX reports come from anonymous Chrome user data. However, only certain users and pages are used as data sources under specific rules, including:

  • Pages that return a successful 200 status code after any redirects (301, 302, etc.).


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Option in Chrome > Settings > Sync & Google services menu


  • Users who have enabled the "Help improve Chrome's features and performance" setting in Chrome > Settings > Sync and Google services.
  • Data from Chromium-based browsers like Microsoft Edge and Yandex are not included.
  • Pages not blocked by noindex.
  • Data from Chrome browsers on iOS are not included.
  • Data from WebView in native Android apps are not included.
  • Data from other browsers like Safari, Firefox, and Opera are not included.
  • Data are sourced from Chrome browsers on Windows, Linux, MacOS, ChromeOS, and Android devices, including Custom Tabs and WebAPK.
  • Additionally, third-party applications use this data to display it elegantly, such as Here’s an example report: Report.

Given Chrome's 65% market share in the browser market (Source: StatCounter), the CrUX dataset remains the largest statistical dataset available. Since 2017, Chrome users have been contributing their data to the Chrome UX report.

Where Can You Access Chrome UX (CrUX) Data Outputs?

CrUX data can be accessed from various sources and used in different ways, including:

  • CrUX BigQuery
  • CrUX Dashboard
  • CrUX API
  • PageSpeed Insights and PageSpeed Insights API
  • Google Search Console


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You can use CrUX Dashboard reports for the best content and quick solution. All you have to do is create the report by entering the URL of the web page you want from the link As above, you will be able to find in-depth reports on a monthly and percentile basis in a single Data Studio report.


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Chrome UX(CrUX) report example

CrUX Data in the PageSpeed ​​Insight Reports

Now hold tight... In fact, the data source of the first part of the PageSpeed ​​Insight reports that we use all the time is CrUX data sets. In other words, the data here shows the performance of that URL in the last 28 days, not its current status.


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CrUX data in the PageSpeed ​​Insight report