Extension Tracker

Core Web Vitals Visualizer

10,000 users Rated 4.95 from 19 ratings Last updated 10 Jun 2026

By MarketingTracer Live in the Chrome Web Store mcffmgagphgpgkdclllnilokablhjcge Last checked 27 Sep 2026, 05:23 UTC

The listing

What the Chrome Web Store shows, as of the last check

Measure, visualize, and debug Core Web Vitals in real time. CrUX history, LCP/CLS/INP breakdowns and performance experimentsSummary from the listing
Developer
MarketingTracer
Trader status
Declared a trader under EU law
Category
Productivity › Developer Tools
First published
29 Oct 2022
Last updated
10 Jun 2026
Version
1.21
Size
2.51 MiB
Minimum Chrome
88
Languages
1 language

English

Website
corewebvitals.io
Support page
https://www.corewebvitals.io/contact
Open in the Chrome Web Store ↗ View the code or download the CRX in CRX Viewer ↗
Users over time As shown on the Chrome Web Store

Tracking began on 27 Sep 2026. The chart appears after the second check.

Show the numbers
CheckedUsersRatingRatings
2026-09-2710,0004.9519
Users, 7 days
–
needs a week of history
Users, 30 days
–
needs a month of history
Rank
#5,164
by users, of 264,703 extensions
In its category
#462
of 27,615 in Developer Tools

What changed

Every change found on a check, newest first

No changes found since tracking began on 27 Sep 2026.

What it can access

From the extension's manifest, in plain language

Every websiteIt can read and change your data on all the sites you visit.
Sites where it runs scripts
  • http://*/*Every website
  • https://*/*Every website
Browser features
  • debuggerUse Chrome's debugger on your tabs, which gives full control of their pages

More from this developer

Other extensions from the same publisher account

ExtensionUsersRatingRatingsCategory
CLS Visualizer9,000 4.3611 Developer Tools
Website Cache Warmer306 3.805 Developer Tools
All 3 extensions by MarketingTracer →

About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 27 Sep 2026, 05:23 UTC; next check around 28 Sep 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “Core Web Vitals Visualizer” (mcffmgagphgpgkdclllnilokablhjcge). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/mcffmgagphgpgkdclllnilokablhjcge. Accessed 2026-09-28.
BibTeX
@misc{extensiontracker_mcffmgagphgpgkdclllnilokablhjcge,
  title   = {Core Web Vitals Visualizer (mcffmgagphgpgkdclllnilokablhjcge)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/mcffmgagphgpgkdclllnilokablhjcge},
  urldate = {2026-09-28}
}

The data is free to reuse under CC BY 4.0.

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