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A list of 21 tools to measure Core Web Vitals (together with screenshots, instructions, and usage tips). 

Measuring Core Web Vitals does not need to be tricky if you know what tools to use and how to use them. 

In this guide, I’m sharing with you a list of 21 tools to measure Core Web Vitals. The list includes the tools that I have personally tested when doing Core Web Vitals audits for my clients. 

Ready to take your Core Web Vitals skills to a new level? Great!ContentsLab tools vs field tools to measure Core Web VitalsCore Web Vitals and other metricsTools to measure Core Web Vitals1: Google PageSpeed Insights2: Google Search Console3: Chrome UX Report (CrUX)4: Google Lighthouse5: Chrome DevTools6: Web.dev7: WebPageTest8: GTmetrix9: TREO Site Speed10: Dunplab Web Vitals Tester11: Web Vitals (Chrome Extension)12: Core SERP Vitals (Chrome Extension)13: Core Web Vitals Annotations (Chrome Extension)14: CLS Visualizer (Chrome Extension)15: Cumulative Layout Shift Debugger16: Layout Shift GIF Generator17: Semrush Site Audit18: PageSpeed Compare19: ContentKing20: DebugBear21: OnlineOrNotFinal Thoughts on Core Web Vitals tools

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Lab tools vs field tools to measure Core Web Vitals 

The tools to measure Core Web vitals fall into two categories:

  • Field tools provide the real-world data that comes from users in the field. This measurement is called Real User Monitoring (RUM) and the data it collects is called field data.
  • Lab tools provide the data on how potential users may experience a website and are used for debugging by developers. The data provided by lab tools are called lab data.

Core Web Vitals and other metrics

Just for a quick reminder, Core Web Vitals are made of three metrics: 

Core Web Vitals metrics

In addition to Core Web Vitals, it’s also worth analyzing and measuring four other metrics:

  • Time to First Byte (TTFB) and First Contentful Paint (FCP) that can be useful when analyzing load speed and diagnosing issues with LCP. 
  • Time to Interactive (TTI) and Total Blocking Time (TBT) that are critical lab metrics that correlate with First Input Delay which can only be measured in the field. 

To learn more about Core Web Vitals, make sure to check my guides:

Tools to measure Core Web Vitals 

And here are 21 different tools you can use to measure Core Web Vitals both in the lab and in the field. Note that all the tools to measure Core Web Vitals rely on either Google Chrome, CrUX, or both.

1: Google PageSpeed Insights

Google PageSpeed Insights (PSI) is the number one tool when it comes to the measurement and assessment of Core Web Vitals. PSI is powered by both Lighthouse and Chrome UX Report, so it provides both the lab and the field data on both mobile and desktop devices. In addition to giving you an overview of field data coming from real-world users (CrUX), PageSpeed Insights also provides specific recommendations on how to improve the performance of the site (Lighthouse). PSI works on a per-page basis.

Type: field and lab, web-based 
Price: free
Core Web Vitals metrics measured: LCP, FID, CLS, FCP, TTI, TBT 
Level: basic, intermediate
URL: Google PageSpeed Insights

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