Ext Ops Panel
Open the app

Screen Ruler - Measure and Inspect the Web

Chrome extension by Mr Violets · Productivity · Developer

  • Featured
  • Established publisher

A Chrome extension in Productivity · Developer with 60 000 users, an established extension.

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

What the developer says, and 5 screenshots

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

Users
60 000
Rating
4.3 (62 ratings)
Users, last 16 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
4.16.1
Updated in the store
2026-09-15
Published
2024-03-29
Manifest
V3
Browser access
8 permissions

How it has moved

Users
unchanged since 31.08
60k · 3 readings
2026-09-08: released 4.15.12026-09-10: released 4.16.02026-09-15: released 4.16.1
  1. 2026-08-3160k
  2. 2026-09-0660k
  3. 2026-09-1560kreleased 4.16.1
Rating
unchanged since 31.08
reviewsrating 4.29 · 3 readings
2026-09-08: released 4.15.12026-09-10: released 4.16.02026-09-15: released 4.16.1
  1. 2026-08-31reviews61rating4.29
  2. 2026-09-06reviews62rating4.29
  3. 2026-09-15reviews62rating4.29released 4.16.1
Users
unchanged since 31.08
60k · 3 readings
2026-09-08: released 4.15.12026-09-10: released 4.16.02026-09-15: released 4.16.1
  1. 2026-08-3160k
  2. 2026-09-0660k
  3. 2026-09-1560kreleased 4.16.1
Rating
unchanged since 31.08
reviewsrating 4.29 · 3 readings
2026-09-08: released 4.15.12026-09-10: released 4.16.02026-09-15: released 4.16.1
  1. 2026-08-31reviews61rating4.29
  2. 2026-09-06reviews62rating4.29
  3. 2026-09-15reviews62rating4.29released 4.16.1

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.

  • Block or redirect requests on the sites it can access declarativeNetRequestWithHostAccess
  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab
Show the remaining 5
  • Add items to the right-click menu contextMenus
  • React to what a page contains without reading it declarativeContent
  • Run work in a hidden page offscreen
  • Open a panel beside the page sidePanel
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 4.16.1
  2. Version 4.16.0
  3. Version 4.15.1

What changed recently

  1. Package size changed
  2. Released version 4.16.1 (was 4.16.0)
  3. Package size changed
Show the remaining 2
  1. Released version 4.16.0 (was 4.15.1)
  2. Released version 4.15.1 (was 4.15.0)

The publisher

Mr Violets publishes 9 listings we track, 79k users between them. Listed website: screen-ruler.com.

  1. Stay Awake: Keep Your Computer Awake Mr Violets · Productivity · Workflow · published 2023-05-28 10k users ★ 4.7
  2. UI Inspector - Visual CSS Editor Mr Violets · Productivity · Developer · published 2024-11-01 5k users ★ 4.0
  3. Marble: Automatically Organized Tab Groups Mr Violets · Productivity · Workflow · published 2023-08-22 2k users ★ 4.6
Show 5 more from this publisher
  1. Deep Tab Search: Tab Switcher & Search Mr Violets · Productivity · Workflow · published 2024-01-09 880 users ★ 3.2
  2. Quilt - Tiling Window Manager Mr Violets · Productivity · Workflow · published 2023-08-08 774 users ★ 5.0
  3. CSS Viewer - Inspect & Copy Any Element's CSS Mr Violets · Productivity · Developer · published 2026-04-10 466 users
  4. Pointer - Element Inspector for DevTools Mr Violets · Productivity · Developer · published 2025-06-25 201 users ★ 3.0
  5. AltCue - Tab Switcher Mr Violets · Make Chrome Yours · Functionality · published 2025-01-17 audience not published ★ 1.0

Like this one

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

  1. Ruler Grid Describes nearly the same job, smaller audience 93 users ★ 5.0
  2. ScreenRuler Describes nearly the same job, smaller audience 73 users
  3. Browser Ruler Describes nearly the same job, smaller audience 60 users
  4. Web Design Ruler Describes nearly the same job, smaller audience 69 users
  5. DesignKit: Ruler, Inspector, Color, Typography & A11y Toolkit Describes nearly the same job, smaller audience 6 users ★ 5.0

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.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

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.