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
See more

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.
Read more

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"] } ]}
Read more

Similar Extensions

icon

Schema Builder for Structured Data Extension · Developer Tools 5,000+ 29 ★ 889KiB

icon

Web Vitals Extension · Developer Tools 5,000+ 43 ★ 398KiB

icon

Core Web Vitals Extension · Developer Tools 5,000+ 5 ★ 7.29KiB

icon

Core Web Vitals history Extension · Productivity 5,000+ 6 ★ 20.6KiB

icon

CLS Checker - Journey Further Extension · Developer Tools 5,000+ 9 ★ 107KiB

icon

Core SERP Vitals Extension · Developer Tools 5,000+ 15 ★ 20.91KiB

icon

Site Speed by DebugBear Extension · Developer Tools 5,000+ 4 ★ 92.18KiB

icon

Core Web Vitals Annotations Extension · Developer Tools 5,000+ 2 ★ 191KiB

icon

Capo: get your ﹤????﹥ in order Extension · Developer Tools 5,000+ 4 ★ 40.08KiB

icon

Redirect Path Extension · Developer Tools 5,000+ 194 ★ 6.06MiB

icon

Web Vitals Tester Extension · Developer Tools 5,000+ 1 ★ 1.07MiB

icon

View Rendered Source Extension · Developer Tools 5,000+ 37 ★ 73.68KiB

icon

CLS Visualizer Extension · Developer Tools 5,000+ 11 ★ 17.27KiB

icon

LCP & CLS Monitor Extension · Developer Tools 5,000+ 1 ★ 19.96KiB

icon

SpeedVitals Extension · Developer Tools 5,000+ 9 ★ 37.18KiB

icon

Analytics Debugger Extension · Developer Tools 5,000+ 211 ★ 300KiB

icon

Robots Exclusion Checker Extension · Developer Tools 5,000+ 32 ★ 185KiB

icon

Datalayer Checker Extension · Developer Tools 5,000+ 33 ★ 93.13KiB

icon

SEO Render Insight Tool Extension · Productivity 5,000+ 8 ★ 74.07KiB

icon

AMP Validator Extension · Developer Tools 5,000+ 97 ★ 2.51MiB

icon

GSC Guardian Extension · Productivity 5,000+ 26 ★ 1.83MiB

icon

Link Redirect Trace Extension · Developer Tools 5,000+ 346 ★ 549KiB

icon

SEO Pro Extension Extension · Developer Tools 5,000+ 82 ★ 233KiB

icon

Google Search Console Enhanced Analytics Extension · Productivity 5,000+ 21 ★ 2.19MiB

User reviews

icon

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

icon

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