Check Core Web Vitals and compare metrics for desktop and mobile devices. Check pagespeed insights using our Chrome extension.

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January 8, 2025
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Core Web Vitals: Check Mobile & Desktop Extension

Check Core Web Vitals and compare metrics for desktop and mobile devices. Website performance testing to improve user experience. Check pagespeed insights using our Chrome extension.

✨ How to use this extension

1. 🛠️ Install the extension.
2. 🌐 Navigate to the web page you want to analyze.
3. 🖱️ Click on the extension icon.
4. 💻 The Core Web Vitals test will calculate metrics for desktop.
5. 📱 Click the \"Mobile\" button to calculate metrics for mobile devices.
6. 🔄 Click the \"Desktop\" or \"Mobile\" button to recalculate the metrics.

💡 Advantages of this extension

🌟 Instant Access to Key Metrics
- ✅ Quickly check Core Web Vitals metrics for any page (including competitors) without needing to access separate tools like Google PageSpeed Insights, Google Search Console, or Lighthouse.
- 📊 The extension automatically displays all critical data for the current page, including both mobile and desktop versions.

📈 Performance Monitoring
- 🕒 Helps you assess website performance in real time, identifying performance issues at any stage of development or maintenance.
- 🔍 Regularly track metrics on pages to ensure that site updates do not negatively impact Core Web Vitals.

📊 Competitive Analysis
- 🤔 Analyze competitor performance to identify their weaknesses and incorporate these insights into your SEO strategy.
- ⚖️ Compare your page metrics with competitor websites under real-world conditions.

📢 Support for SEO Ranking and Conversion Improvements
- 📈 Optimizing Core Web Vitals directly impacts a website's ranking on Google. The extension helps you address issues promptly and maintain competitive performance metrics.
- 🎯 Improving Core Web Vitals leads to better user experiences, reduced bounce rates, and higher conversions.


👥 Who will benefit from this extension

- 🛠️ SEO Specialists.
Monitor and optimize website performance for better rankings. Analyze competitors' Core Web Vitals metrics.

- 🖥️ Web Developers.
Identify and fix performance issues (e.g., slow LCP, high CLS). Test the impact of code changes on page speed and responsiveness.

- 🎨 UI/UX Designers.
Ensure smooth user experiences by minimizing layout shifts and delays. Test design changes in real-world conditions.

- 📊 Digital Marketers.
Improve website performance to reduce bounce rates and boost conversions. Understand how speed affects user engagement.

- 📋 Product Managers.
Track page performance as part of product quality. Communicate insights and prioritize fixes with development teams.

- 🔍 QA Engineers.
Validate Core Web Vitals during testing phases. Ensure website updates meet performance standards.

📏 Which Core Web Vitals metrics are calculated?

✅ LCP (Largest Contentful Paint) is a Core Web Vitals metric that measures the time it takes for the largest visible content element on a webpage to fully load and become visible to the user. This content is typically the largest image, video, or block of text in the viewport. LCP is an important indicator of page performance and user experience, as it reflects how quickly users can see and interact with the main content of the page. Google recommends an LCP time of 2.5 seconds or less for a good user experience.

✅ CLS (Cumulative Layout Shift) is a Core Web Vitals metric that measures the visual stability of a webpage by tracking unexpected layout shifts during the page's lifecycle. These shifts occur when visible elements, such as images, buttons, or text, move unexpectedly while the page is loading or in response to dynamic content.
CLS is calculated based on the size of the unstable elements and the distance they move in relation to the viewport. A low CLS score (ideally 0.1 or less) indicates a stable and user-friendly experience, while a high score suggests disruptive layout shifts that can frustrate users.

✅ INP (Interaction to Next Paint) is a Core Web Vitals metric that measures the responsiveness of a webpage by evaluating how quickly it reacts to user interactions, such as clicks, taps, or keyboard inputs. INP focuses on the time between the user's interaction and the next visual update (paint) that reflects the response.
This metric helps identify delays in interactivity and measures the page's ability to respond promptly to user actions. A good INP value is 200 milliseconds or less, indicating a responsive and seamless user experience. High INP values suggest sluggish interactivity, which can frustrate users.

✅ FCP (First Contentful Paint) is a web performance metric that measures the time it takes for a browser to render the first piece of content from the DOM after a user navigates to a page. This content could be text, an image, or a non-white background, and it signals to the user that the page is starting to load.
FCP is a key indicator of perceived loading speed, as it provides the first visual feedback to users. Google recommends an FCP time of 1.8 seconds or less for a good user experience.

✅ TTFB (Time to First Byte) is a web performance metric that measures the time it takes for a user's browser to receive the first byte of data from the server after making an HTTP request.
TTFB is an important metric for evaluating server responsiveness and overall website performance. Lower TTFB values (ideally less than 200 milliseconds) indicate faster server responses and a better user experience.

🚀 This extension makes the process of analyzing Core Web Vitals accessible, convenient, and efficient, enabling you to better meet the requirements of search engines and users. It is an excellent tool for improving performance, enhancing user experience, and achieving SEO goals.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "name": "__MSG_appName__", "description": "__MSG_appDesc__", "version": "1.0", "default_locale": "en", "permissions": [ "tabs", "storage", "debugger", "activeTab", "scripting", "runtime" ], "icons": { "128": "icons/vitals128w.png", "256": "icons/vitals256w.png", "512": "icons/vitals512w.png" }, "host_permissions": ["*://*/*"], "background": { "service_worker": "background.js" }, "action": { "default_icon": "icons/vitals256w.png", "default_title": "__MSG_appName__", "default_popup": "popup.html" }, "content_security_policy": { "extension_pages": "default-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; object-src 'self'; script-src 'self'; " }}
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How to download and manually install Core Web Vitals: Check Mobile & Desktop extension for Chrome

Looking for a way to install Core Web Vitals: Check Mobile & Desktop extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Core Web Vitals: Check Mobile & Desktop extensions manually, this article outlines two simple methods to effortlessly install Core Web Vitals: Check Mobile & Desktop extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Core Web Vitals: Check Mobile & Desktop extension and manually install through Drag &Drop

If you ever need to manually install a Core Web Vitals: Check Mobile & Desktop extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Core Web Vitals: Check Mobile & Desktop Extension by clicking the "Download CRX" button on the website.

Look for the Core Web Vitals: Check Mobile & Desktop extension you wish to install. Go to the website and download the Core Web Vitals: Check Mobile & Desktop extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Core Web Vitals: Check Mobile & Desktop extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Core Web Vitals: Check Mobile & Desktop extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Core Web Vitals: Check Mobile & Desktop extension for Chrome and install in Developer Mode

This is another method to install Core Web Vitals: Check Mobile & Desktop extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Core Web Vitals: Check Mobile & Desktop extension file

Select and download the Core Web Vitals: Check Mobile & Desktop extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Core Web Vitals: Check Mobile & Desktop extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Core Web Vitals: Check Mobile & Desktop extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Core Web Vitals: Check Mobile & Desktop extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Core Web Vitals: Check Mobile & Desktop extension in 2 ways. We hope this guide proves helpful.

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