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HTML Validator Extension

Chrome extension · Productivity · Developer

A Chrome extension in Productivity · Developer with 8 users, barely installed. Audience over the last 30 days: +4.

Specific sites only: 1 match pattern.

What the developer says, and 1 screenshot

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
8
Rating
not rated yet
Users, last 30 days
+4
Version
1.0.1
Updated in the store
2025-03-13
Published
2025-03-13
Manifest
V3
Browser access
2 permissions, 1 site pattern

How it has moved

Users
+4 since 03.10
4-8 · 13 readings
  1. 2026-10-056
  2. 2026-10-085
  3. 2026-10-096
  4. 2026-10-105
  5. 2026-10-136
  6. 2026-10-185
  7. 2026-10-216
  8. 2026-10-225
  9. 2026-10-245
  10. 2026-10-286
  11. 2026-10-297
  12. 2026-11-018
  13. 2026-11-028
Users
+2 since 01.09
4-8 · 24 readings
  1. 2026-09-016
  2. 2026-09-037
  3. 2026-09-046
  4. 2026-09-067
  5. 2026-09-075
  6. 2026-09-096
  7. 2026-09-105
  8. 2026-09-156
  9. 2026-09-175
  10. 2026-09-276
  11. 2026-09-284
  12. 2026-10-056
  13. 2026-10-085
  14. 2026-10-096
  15. 2026-10-105
  16. 2026-10-136
  17. 2026-10-185
  18. 2026-10-216
  19. 2026-10-225
  20. 2026-10-245
  21. 2026-10-286
  22. 2026-10-297
  23. 2026-11-018
  24. 2026-11-028

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 1 match pattern.

  • http://localhost/*
  • See the address and title of every tab you have open tabs
  • Open a panel beside the page sidePanel

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

Like this one

Listings the catalog judges closest in what they say they do.

  1. Validify Describes nearly the same job, smaller audience 104 users ★ 5.0
  2. HTML Validator Describes nearly the same job, with an established audience 30k users ★ 3.5
  3. NuCheck Describes nearly the same job, smaller audience 12 users
  4. HTML & CSS W3C Validator Pro Describes nearly the same job, smaller audience 211 users ★ 4.4
  5. HTML Validator Describes nearly the same job, smaller audience 2k users ★ 3.6

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/khipkeiffbannjijmoenaekmmbbnfmge/badge.svg)](https://extops.dev/extensions/khipkeiffbannjijmoenaekmmbbnfmge)

HTML

<a href="https://extops.dev/extensions/khipkeiffbannjijmoenaekmmbbnfmge"><img src="https://extops.dev/extensions/khipkeiffbannjijmoenaekmmbbnfmge/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-01. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built