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HTML Tag Error Checker

Chrome extension by macha · Productivity · Developer

A Chrome extension in Productivity · Developer with 6 000 users, a small but real audience.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 3 screenshots

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

Users
6 000
Rating
5.0 (1 ratings)
Users, last 18 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
16.3.1
Updated in the store
2026-03-30
Published
2024-05-02
Manifest
V3
Browser access
4 permissions

How it has moved

Users
unchanged since 01.09
6k · 2 readings
  1. 2026-09-016k
  2. 2026-09-186k
Rating
unchanged since 01.09
reviewsrating 5.00 · 2 readings
  1. 2026-09-01reviews1rating5.00
  2. 2026-09-18reviews1rating5.00
Users
unchanged since 01.09
6k · 2 readings
  1. 2026-09-016k
  2. 2026-09-186k
Rating
unchanged since 01.09
reviewsrating 5.00 · 2 readings
  1. 2026-09-01reviews1rating5.00
  2. 2026-09-18reviews1rating5.00

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

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

  • See the address and title of every tab you have open tabs
  • Act on the current tab, but only after you click it activeTab
  • Add items to the right-click menu contextMenus
Show the remaining 1
  • 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

macha publishes 18 listings we track, 21k users between them. Listed website: app.macha795.com.

  1. SEO META 1 COPY macha · Productivity · Developer · published 2021-08-02 10k users ★ 4.8
  2. Left Click Open New Tab macha · Make Chrome Yours · Accessibility · published 2014-11-03 1k users ★ 2.8
  3. G-CAL Highlighter macha · Make Chrome Yours · Accessibility · published 2023-03-29 1k users ★ 3.5
Show 5 more from this publisher
  1. Show Title Tag Corner macha · Productivity · Tools · published 2024-02-01 1k users ★ 4.8
  2. Detector Whats Font macha · Productivity · Developer · published 2024-02-18 771 users
  3. Toggle Disable All Extensions macha · Productivity · Workflow · published 2024-04-15 512 users ★ 5.0
  4. Image File Name Popup macha · Productivity · Workflow · published 2015-01-05 387 users ★ 4.0
  5. Window Resize Presetter macha · Productivity · Developer · published 2024-01-22 176 users ★ 1.0

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. HTML Tag Checker by ACHN Describes nearly the same job, smaller audience 51 users ★ 5.0
  3. HTML validator Describes nearly the same job, smaller audience 557 users ★ 5.0
  4. NuCheck Describes nearly the same job, smaller audience 8 users
  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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See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.