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Chrome extension by Patrick Verhaert · Productivity · Developer

A Chrome extension in Productivity · Developer with 101 users, barely installed. Audience over the last 30 days: +9.

Specific sites only: 1 match pattern.

What the developer says, and 2 screenshots

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

Users
101
Rating
5.0 (2 ratings)
Users, last 30 days
+9
Rating, last 30 days
Steady over 30 days
Version
0.1.0
Updated in the store
2025-12-11
Published
2025-12-08
Manifest
V3
Browser access
3 permissions, 1 site pattern

How it has moved

Users
+9 since 01.10
88-101 · 14 readings
  1. 2026-10-0491
  2. 2026-10-0888
  3. 2026-10-0990
  4. 2026-10-1088
  5. 2026-10-1190
  6. 2026-10-1889
  7. 2026-10-1991
  8. 2026-10-2195
  9. 2026-10-2294
  10. 2026-10-2396
  11. 2026-10-2496
  12. 2026-10-2595
  13. 2026-10-29101
  14. 2026-10-31101
Rating
unchanged since 01.10
reviewsrating 5.00 · 14 readings
  1. 2026-10-04reviews2rating5.00
  2. 2026-10-08reviews2rating5.00
  3. 2026-10-09reviews2rating5.00
  4. 2026-10-10reviews2rating5.00
  5. 2026-10-11reviews2rating5.00
  6. 2026-10-18reviews2rating5.00
  7. 2026-10-19reviews2rating5.00
  8. 2026-10-21reviews2rating5.00
  9. 2026-10-22reviews2rating5.00
  10. 2026-10-23reviews2rating5.00
  11. 2026-10-24reviews2rating5.00
  12. 2026-10-25reviews2rating5.00
  13. 2026-10-29reviews2rating5.00
  14. 2026-10-31reviews2rating5.00
Users
+20 since 01.09
71-101 · 30 readings
  1. 2026-09-0181
  2. 2026-09-0280
  3. 2026-09-0476
  4. 2026-09-0575
  5. 2026-09-0671
  6. 2026-09-0772
  7. 2026-09-0874
  8. 2026-09-1079
  9. 2026-09-1378
  10. 2026-09-1581
  11. 2026-09-1783
  12. 2026-09-2085
  13. 2026-09-2188
  14. 2026-09-2590
  15. 2026-09-2693
  16. 2026-09-2892
  17. 2026-10-0491
  18. 2026-10-0888
  19. 2026-10-0990
  20. 2026-10-1088
  21. 2026-10-1190
  22. 2026-10-1889
  23. 2026-10-1991
  24. 2026-10-2195
  25. 2026-10-2294
  26. 2026-10-2396
  27. 2026-10-2496
  28. 2026-10-2595
  29. 2026-10-29101
  30. 2026-10-31101
Rating
unchanged since 01.09
reviewsrating 5.00 · 30 readings
  1. 2026-09-01reviews2rating5.00
  2. 2026-09-02reviews2rating5.00
  3. 2026-09-04reviews2rating5.00
  4. 2026-09-05reviews2rating5.00
  5. 2026-09-06reviews2rating5.00
  6. 2026-09-07reviews2rating5.00
  7. 2026-09-08reviews2rating5.00
  8. 2026-09-10reviews2rating5.00
  9. 2026-09-13reviews2rating5.00
  10. 2026-09-15reviews2rating5.00
  11. 2026-09-17reviews2rating5.00
  12. 2026-09-20reviews2rating5.00
  13. 2026-09-21reviews2rating5.00
  14. 2026-09-25reviews2rating5.00
  15. 2026-09-26reviews2rating5.00
  16. 2026-09-28reviews2rating5.00
  17. 2026-10-04reviews2rating5.00
  18. 2026-10-08reviews2rating5.00
  19. 2026-10-09reviews2rating5.00
  20. 2026-10-10reviews2rating5.00
  21. 2026-10-11reviews2rating5.00
  22. 2026-10-18reviews2rating5.00
  23. 2026-10-19reviews2rating5.00
  24. 2026-10-21reviews2rating5.00
  25. 2026-10-22reviews2rating5.00
  26. 2026-10-23reviews2rating5.00
  27. 2026-10-24reviews2rating5.00
  28. 2026-10-25reviews2rating5.00
  29. 2026-10-29reviews2rating5.00
  30. 2026-10-31reviews2rating5.00

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.

  • https://validator.w3.org/*
  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab
  • Store data in your browser storage

The full permission history for this extension

What changed recently

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

The publisher

Patrick Verhaert publishes 4 listings we track, 175 users between them.

  1. AspectSnap Patrick Verhaert · Productivity · Developer · published 2026-06-13 39 users
  2. Semantiscope Patrick Verhaert · Productivity · Developer · published 2025-12-10 26 users
  3. WebQR Patrick Verhaert · Productivity · Tools · published 2026-06-21 9 users

Like this one

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

  1. HTML Validator Describes nearly the same job, smaller audience 2k users ★ 3.6
  2. NuCheck Describes nearly the same job, smaller audience 12 users
  3. HTML & CSS W3C Validator Pro Describes nearly the same job, smaller audience 392 users ★ 4.4
  4. HTML validator Describes nearly the same job, smaller audience 547 users ★ 5.0
  5. HTML Validator Describes nearly the same job, with an established audience 30k users ★ 3.5

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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The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

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

HTML

<a href="https://extops.dev/extensions/mcodhpijcbmcbeaobimpfoinafinojde"><img src="https://extops.dev/extensions/mcodhpijcbmcbeaobimpfoinafinojde/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 2026-10-29. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built