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web.dev Measure

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description web.dev Measure Overview

Web.dev Measure is a free, open-source tool that analyzes website performance by simulating real user connections and rendering processes to provide detailed metrics on loading speed, First Contentful Paint, Largest Contentful Paint, and other key indicators of web page experience.

help web.dev Measure FAQ

What specific metrics does web.dev Measure evaluate?

The tool analyzes your site based on Google's Core Web Vitals, specifically focusing on Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS). It also provides an overall Performance score out of 100 based on Lighthouse criteria.

Does web.dev Measure test websites on mobile devices?

Yes, it allows you to run tests simulating both desktop and mobile environments, adjusting for mobile CPU throttling and slower network connections. This helps developers see exactly how their pages load on mid-range smartphones.

Is web.dev Measure free to use?

Yes, web.dev Measure is completely free to use and is powered directly by Google's open-source Lighthouse technology. You can run as many audits as you need without any subscription or API limits.

How does web.dev Measure differ from PageSpeed Insights?

While both tools are powered by Lighthouse, web.dev Measure integrates directly into the broader web.dev learning platform. PageSpeed Insights, on the other hand, also incorporates real-world field data from the Chrome User Experience Report (CrUX).

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