Extension Tracker

HTML & CSS W3C Validator Pro

163 users Rated 4.40 from 5 ratings Last updated 30 Aug 2026

By Rocco Caruso Live in the Chrome Web Store gbcbpmopobamggpanijecbdljcgolhof Last checked 27 Sep 2026, 01:30 UTC

The listing

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

Advanced validator that extracts, merges, and validates HTML/CSS (including external styles) via W3C standards.Summary from the listing
Developer
Rocco Caruso
Trader status
Not declared a trader under EU law
Category
Productivity › Developer Tools
First published
1 Feb 2026
Last updated
30 Aug 2026
Version
1.5
Size
212 KiB
Minimum Chrome
88
Languages
1 language

English

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
2026-09-271634.405
Users, 7 days
–
needs a week of history
Users, 30 days
–
needs a month of history
Rank
#54,413
by users, of 264,704 extensions
In its category
#4,802
of 27,614 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
  • <all_urls>Every website
  • https://jigsaw.w3.org/*jigsaw.w3.org
  • https://validator.w3.org/*validator.w3.org
Browser features
  • activeTabThe tab you're on, only after you click the extension
  • debuggerUse Chrome's debugger on your tabs, which gives full control of their pages
  • scriptingRun scripts on sites it can reach
  • storageSave settings and data in your browser

More from this developer

Other extensions from the same publisher account

ExtensionUsersRatingRatingsCategory
Browser Audio & Video Capture232 5.005 Tools
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Page & IFrame Analyzer71 5.006 Developer Tools
Request Interceptor Pro42 5.004 Developer Tools
Page & Download Date Checker35 5.004 Developer Tools
Cookie & UA Manager29 5.004 Developer Tools
Accessibility & Responsive Checker26 5.005 Developer Tools
Tarot Reading13 5.005 Well-being
Your Birth Chart12 5.003 Just for Fun
QR Code Generator11 5.004 Tools
All 13 extensions by Rocco Caruso →

About this data

Collected from the extension's public Chrome Web Store listing. It's checked every month, and again whenever a new version appears. Last checked 27 Sep 2026, 01:30 UTC; next check around 12 Oct 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “HTML & CSS W3C Validator Pro” (gbcbpmopobamggpanijecbdljcgolhof). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/gbcbpmopobamggpanijecbdljcgolhof. Accessed 2026-09-28.
BibTeX
@misc{extensiontracker_gbcbpmopobamggpanijecbdljcgolhof,
  title   = {HTML & CSS W3C Validator Pro (gbcbpmopobamggpanijecbdljcgolhof)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/gbcbpmopobamggpanijecbdljcgolhof},
  urldate = {2026-09-28}
}

The data is free to reuse under CC BY 4.0.

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