Web Vitals

Measure metrics for a healthy site

What is Web Vitals?

"Web Vitals" is a Chrome extension that gauges real-time user experience metrics critical for a healthy website. It assesses Core Web Vitals to provide feedback on loading, interactivity, and layout stability. Features include an Ambient Badge indicating metric success, a detailed popup for metric drill-down, and an overlay for continuous on-page metric display. It aligns with Chrome's measurement standards and integrates real-user data to benchmark against other users' experiences.

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Extension stats

By: addyosmani

View on Chrome Web Store

Users: 100,000+

Rating: 4.21 (43)

Version: 1.5.3 (Last updated: 2024-09-12)

Creation date: 2020-06-30

Risk impact: High risk impact

Risk likelihood: Very low risk likelihood

Manifest version: 3

Permissions:

tabs
storage
activeTab
scripting

Host permissions:

*://*/*

Size: 407.55K

Email: ad*****@gmail.com

Ranking

# 2524 ▼ 8

Other rankings

#29 in Developer Tools

#9 in user experience keyword 18 ▲ 1

#39 in ux keyword 19 ▲ 1

#56 in badge keyword 8

#76 in value keyword 8 ▲ 3

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Other platforms

Not available on Firefox

Web Vitals (v3.9.16.1416)

4.20

(14) 1,105+

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Extension summary

Analyze keywords

Web Vitals are quality signals key to delivering great UX on the web (https://web.dev/vitals). This extension measures the Core Web Vitals, providing instant feedback on loading, interactivity and layout shift metrics. It is consistent with how these metrics are measured by Chrome and reported to other Google tools (e.g. Chrome User Experience Report, Page Speed Insights, Search Console).

The extension supports all of the Core Web Vitals and captures:

Largest Contentful Paint Cumulative Layout Shift Interaction to Next Paint

It also supports the diagnostic metrics:

Time to First Byte First Contentful Paint

And finally, it temporarily supports the following deprecated metrics:

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.

Pros

Works wonderfully well
Thanks for the super useful extension
It shows the CLS score. That's a big help.

Cons

Doesn't work most of the time. Just says 'Web Vitals are unavailable for this page'
The flickering numbers are distracting and cannot be disabled.

Most mentioned

Doesn't work most of the time. Just says 'Web Vitals are unavailable for this page'
The flickering numbers are distracting and cannot be disabled.
It shows the CLS score. That's a big help.

User reviews

First Input Delay Waiting for input… It still working after 4 hours, no indicator in %, just standing there while all the other measurements finished their job on time.