Visualize the Core Web Vitals of any webpage

Latest Version

Version
1.12
Update
June 6, 2024
Size
2.39MiB
Developer
Category
Users
5,000+
Rating
4.91667 ★
Manifest Version
3
Web Store Status
Languages Support
English
See more
Permissions
Debugger
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Core Web Vitals Visualizer Extension

RUM Visualizer visualizes the Core Web Vitals for any webpage.

This extension will visualize the Core Web Vitals for any webpage. It includes the Largest Contentful Paint (LCP), First Input Delay (FID), Cumulative layout Shift (CLS), First Contentful Paint (FCP), Interaction to Next Paint (INP) and the Time To First Byte (TTFB). Get direct access to the Core Web Vitals historical data!

Features:

LCP
- Get LCP RUM values
- Visualize the LCP.
- Break down the LCP into Time to first byte, Resource load delay, Resource load time and Element render delay

INP
- Get INP RUM values
- Visualize the INP.
- INP breakdown

CLS
- Get CLS RUM values
- Show CLS breakdown
- Visualize the CLS
- Animate the CLS.

FCP
- Get FCP RUM values
- break down the FCP


TTFB
- get TTFB RUM values
- breakdown the TTFB

Easy debugging:
- Emulate slow network conditions (3g).
- Enable or disable Caching for the current page.

changes:
1.12 Better messaging + improved elementtiming, better logging to console
1.11 Removed the FID, the Web Vitals are now based upon the upcoming v4 of the web vitals library, new breakdown details, improved CSS visualization, small bugfixes, code cleanup.
1.10 Promote INP to a Core Web Vitals and demote FID to a metric of interest!
1.9 CrUX history API, small fixes, more CLS info
1.8 Better metric updates, better logging, minor improvements
1.7 Log Events, Long Tasks and Long Animation Frames to the console that happen during and might interfere with the INP.
1.6 Better INP Breakdown, minor code improvements.
1.5 code improvements, layout improvements, added page experiments (defer javascript, disable javascript, disable third party scripts, lazy load images, defer background images & disable webfonts).
1.4 left side menu, more information about render blocking resources and direct links to PSI, CrUX dashboard and W3C.
1.2 added lots of LCP information like preloading, fetchpriority, rendering breakdown, first or third party etc.
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Source Manifest.json

{ "action": { "default_popup": "popup.html" }, "content_security_policy": { "extension_pages": "script-src 'self'; object-src 'self'" }, "description": "Visualize the Core Web Vitals of any webpage", "icons": { "144": "icons/rum144.png", "16": "icons/rum16.png", "48": "icons/rum48.png" }, "manifest_version": 3, "name": "Core Web Vitals Visualizer", "permissions": ["debugger"], "update_url": "https://clients2.google.com/service/update2/crx", "version": "1.12", "content_scripts": [ { "matches": ["https://*/*", "http://*/*"], "run_at": "document_start", "js": ["js/content.js"] } ]}
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How to download and manually install Core Web Vitals Visualizer extension for Chrome

Looking for a way to install Core Web Vitals Visualizer 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 Visualizer extensions manually, this article outlines two simple methods to effortlessly install Core Web Vitals Visualizer extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Core Web Vitals Visualizer extension and manually install through Drag &Drop

If you ever need to manually install a Core Web Vitals Visualizer 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 Visualizer Extension by clicking the "Download CRX" button on the website.

Look for the Core Web Vitals Visualizer extension you wish to install. Go to the website and download the Core Web Vitals Visualizer extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Core Web Vitals Visualizer 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 Visualizer 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 Visualizer extension for Chrome and install in Developer Mode

This is another method to install Core Web Vitals Visualizer 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 Visualizer extension file

Select and download the Core Web Vitals Visualizer 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 Visualizer 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 Visualizer 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 Visualizer 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 Visualizer extension in 2 ways. We hope this guide proves helpful.

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User reviews

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Charles Meaden (ID: 0000006ca7f651a4) Voted 5 ★ - Updated 03/02/2023 My new favourite tool to look at Core Web Vitals scores

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Hans Stoop (ID: 000000e04c2bc370) Voted 5 ★ - Updated 10/30/2022 Great tool to visualize the Core Web Vitals