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CWV: 12 Effective Core Web Vitals Tools To Measure And Improve Your Site’s Performance


Ever since the announcement of Google’s Core Web Vitals in May 2020, a lot has been said about it and the importance of user experience now more than ever. However, measuring core web vitals can be a little overwhelming especially if you don’t know what metrics to track or the resources to use in measuring your website’s performance. 

This article provides a deep understanding of core web vitals tools and how to use them to better the performance of your site and help improve user experience. 

We’ve compiled a list of 10 important tools to measure core web vitals. These tools fall under both field and lab (we’ll discuss that in more detail). 

Ready to improve your core web vitals? Great, let’s dive in!

What Are Core Web Vitals?


According to Google, Core Web Vitals is “A set of real-world, user-centred metrics that quantify key aspects of the user experience. For example, it measures dimensions of web usability such as load time, interactivity, and the stability of content as it loads.”

Core web vitals are page experience indicators that assess the quality of a website’s user experience (UX), showing how quickly visitors will be able to interact with your website. They also indicate how simple it is for users to navigate the website. Simply put, core web vitals are signals Google uses to assess the user experience on your site.

Why Are Core Web Vitals Important?

A lot is said about core web vitals and why you need to take them seriously. But, do you know why? Are you aware of the importance of core web vitals? 

The importance of core web vitals stems from the fact that they are primarily concerned with various users. Therefore, it highlights the aspects of the web page to develop it to improve the user experience, also known as UX.

Users will prefer to visit your website to gather different types of information as needed if your website has a better user experience. The user type is also observed by their search preferences and is most interested in the Core Web Vitals. Some of the most valuable reports are easily accessible.

You can easily take some of the most important steps with the help of the provided report, which will help you develop your site according to the tastes of different types of users so that users have a better experience on your website.

  • Conversion Rate – Page load time affects visitors; if your site loads in 1.2 seconds, you’ve lost 30% of your visitors
  • Google Organic Ranking – A bad CWV score will affect your SEO
  • Ads Costs – Low CWV score means high ad costs

Core Web Vitals Metrics

Core web vitals are made up of three metrics – Large Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS). 

  • The largest Contentful Paint (LCP) checks the page’s loading speed.
  • First Input Delay (FID) measures the interactivity of the page.
  • Cumulative Layout Shift (CLS) focuses on the visual stability of your site.

Core Web Vitals Tools 

Any website’s long-term success hinges on its ability to provide a high-quality user experience. These tools can help you measure the background of your site and find possibilities for improvement, whether you’re a business owner, marketer, or developer. However, when it comes to core web vitals tools, they are categorised into two – field tools and lab tools. 

Field Tools: These tools give you real-time data collected by users on the ground. When a user views our page, field data is collected. These core vitals tools are excellent for analysing real-world user experience issues.

Lab tools: Developers use these to troubleshoot websites and offer statistics on how potential users may interact with them. The lab data is the information produced by lab tools. It’s good in troubleshooting performance issues and recording ideas for further research.

1. Google PageSpeed Insights 

Another core web vital tool is Google PageSpeed Insight. Your site speed is a crucial factor in user experience (UX). PageSpeed Insights offers both lab and field data. Not only does it offer you an overview of field data, but it also gives you recommendations on how you can improve your site’s performance. Google’s PageSpeed Insights is useful for initial, top-line inquiries into performance and CWV-related issues for both mobile and desktop devices. 

Reports include ‘Field Data,’ which describes how real-world people interact with the website, and ‘Lab’ data, which replicates a page load and is valuable for repeatable and consistent testing. It’s effortless to use PageSpeed Insights on your website. All you have to do is go to the PageSpeed Insights page and type in the URL of the web page you want to examine.

At the top of the report, PSI includes a score that summarizes the page’s performance. A score of 90 or higher is usually suggested to pass the performance evaluation. PSI will also tell you if your website fits the requirements for a great user experience.

2. Chrome DevTools Performance Monitor 

Another core web vitals tool is Chrome DevTools Performance Monitor. You can follow the steps below to get started:

  • Because LCP and CLS elements will often alter at different resolutions, you’ll want to make sure you’re running the performance monitor at the correct answer.
  • You might want to replicate the connectivity and power of a mobile device before running the report.
  • Once you have the report, selecting the LCP metric determines the largest piece. This should be as near as possible to the FCP (First Contentful Paint). If there is a void, you should identify and streamline the delivery of the most crucial component.
  • The red diagonals on the grey bars indicate long CPU tasks. Drilling down the bars below will generally reveal the JavaScript files and functions causing the problem.
  • These red bars identify layout shifts and picking them highlights which element has been altered. CLS values will be higher if there are a lot of these.
  • The frame view can be a valuable tool for highlighting how information and layout change. The cause of high CLS values is frequently clear from the frames.

3. Google Search Console

The Core Web Vitals report from Google Search Console can help you analyze and discover groupings of pages that may need to be improved or fixed. Google Search Console (GSC) is based on the Chrome UX Report data. The URLs are categorised by their metric kind and state – bad, needs improvement, and good. The GSC Core Web Vitals report will show you how well all (or most) of your web pages perform in a Core Web Vitals test. 

The study indicates groups of pages that want work based on real-world data from the Chrome UX report.

4. Chrome UX Report (CrUX)

Although not a core web vital tool, Chrome UX report is a public dataset that comprises real-world user experience from many websites. The Chrome UX report assesses field versions of all Core Web Vitals. The Chrome User Experience Report data comes from Chrome users who have opted in; therefore, it monitors field data for all Core Web Vitals indicators. You can use the CrUX API to measure the field versions of Core Web Vitals in your app if you’re a developer.

5. Google Lighthouse

Google Lighthouse is the most popular tool for testing your website in a lab setting. It lets you audit and evaluates your website in four areas: performance, accessibility, best practices, and SEO. Lighthouse tracks largest contentful paint (LCP), cumulative layout shift (CLS), time to interactive (TTI), and total blocking time (TBT), among other lab user experience parameters. The program will also make specific suggestions for how to improve your website.

The Lighthouse Extensions provide a shortcut to the same reporting capability seen in Chrome DevTools, except it uses the Lighthouse API to pull in Lab Data rather than Field Data from real-world users via CrUX.

The performance report is quite comparable to PageSpeed Insights mobile analysis, including diagnostics and recommendations that are relatively similar. Additional information for SEO, Accessibility and Best Practice is also generated.

6. Chrome DevTools

Total Blocking Time (TBT) is also measured by Chrome DevTools, which is essential for reducing First Input Delay (FID). When you test page performance in the Chrome DevTools Performance panel, TBT is now displayed in the footer. Chrome DevTools is a developer tool that comes pre-installed with the Chrome browser. Right-click and select “Inspect,” and Chrome DevTools will launch to access it. You may examine some of the Core Web Vitals metrics using the Chome DevTools Performance panel. Keep an eye on Web Vitals. The part on experience will assist you in analyzing layout alterations.

7. Web Vitals

Web Vitals is a Chrome Extension that allows you to analyze Core Web Vitals metrics in real-time on your desktop. Developers who want to examine and debug the changes made may find the Web Vitals Chrome Extension very useful. Simply visit the page and then click on the extension to study analytics.

Another option for measuring Core Web Vitals metrics in real-time is the Chrome Web Vitals extension for desktop. This is useful for detecting issues earlier in the development cycle and as a diagnostic tool for evaluating Core Web Vitals’ performance while browsing the web.

This Chrome add-on measures the three primary CWV metrics in real-time for desktop users, and its traffic light colouring provides a fast indicator as you browse through a website. It can be useful for developers working in a local environment to spot any flaws early because it doesn’t rely on externally collected user data.

8. GTmetrix


GTmetrix is another important lab tool for evaluating your site’s speed and performance. It is a page speed and performance analysis tool. GTmetrix is a free application that helps generate thorough information regarding a website’s performance. It assigns scores to the pages and makes ideas for improving them. GTmetrix core web vitals tool relies on Google Lighthouse data, and it tracks parameters like Largest Contentful Paint, Total Blocking Time, Cumulative Layout Shift, and more.

9. Web.dev

Web. dev is a more upscale version of Google Lighthouse. The primary distinction is that the web. dev tool will save the history of your audits if you are logged into your Google account. This could be useful if you’re constantly improving a website and want to track your progress over time.

10. TREO Site Speed


Another exciting tool for measuring Core Web Vitals is TREO Site Speed. It features a spotless and straightforward user interface. You can trust the data because it is based on field data from the Chrome UX Report and lab data from Google Lighthouse. This tool is great because it displays historical data on how the site’s Core Web Vitals metrics were evaluated.

11. Core SERP Vitals


Another handy Google Chrome extension is Core SERP Vitals, which allows you to view the Core Web Vitals metrics of pages right in search results. It’s useful for competitor research and can give you an idea of how fast a website will be before you visit it. It measures the LCP, FID and CLS metrics.

12. Semrush Site Audit


The assessment of Core Web Vitals has recently been included in the Semrush Site Audit tool. You can now review the Core Web Vitals report after running the Semrush Site Audit (in Overview under Thematic Reports). Semrush reports on measures including LCP, TBT, and CLS using Lighthouse data.

Final Thoughts

These tools measure your site’s performance and provide vital insights and recommendations on areas to improve. 

The harsh reality is that core web vitals is not always that easy; it can seem overwhelming and confusing especially if you don’t know the metrics to track and how to measure and interpret them. That’s where we come in. If you need expert advice on core web vitals and how to improve your user experience, you can book a free consultation with us today.


Yes, Core Web Vitals are a ranking factor. The Core Web Vitals, which measure the user experience on a page, have a meaningful impact on Google rankings. As a result, they are a ranking element and thus important for search engine optimisation.

Different devices, network connections, geography, and other factors can all influence how a page loads and is seen by a user. While some users may have a positive experience under certain circumstances, this may not be representative of other users’ experiences.

Google Core Web Vitals are observable SEO performance metrics that show you how visitors interact with your site. They provide you with particular, measurable data points to help you improve your website’s overall user experience.

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