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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. Audience over the last 30 days: unchanged.

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 30 days
Unchanged (the store rounds this count to 10 000, so it moves only between steps)
Rating, last 30 days
Steady over 30 days
Version
4.21.1
Updated in the store
2026-10-28
Published
2024-03-29
Manifest
V3
Browser access
8 permissions

How it has moved

Users
unchanged since 01.10
60k-70k · 3 readings
2026-10-16: released 4.18.02026-10-19: released 4.18.12026-10-20: released 4.19.02026-10-21: released 4.19.12026-10-22: released 4.20.02026-10-24: released 4.20.12026-10-26: released 4.21.02026-10-29: released 4.21.1
  1. 2026-10-1770k
  2. 2026-10-2960kreleased 4.21.1
  3. 2026-10-3160k
Rating
unchanged since 01.10
reviewsrating 4.29 · 3 readings
2026-10-16: released 4.18.02026-10-19: released 4.18.12026-10-20: released 4.19.02026-10-21: released 4.19.12026-10-22: released 4.20.02026-10-24: released 4.20.12026-10-26: released 4.21.02026-10-29: released 4.21.1
  1. 2026-10-17reviews62rating4.29
  2. 2026-10-29reviews62rating4.29released 4.21.1
  3. 2026-10-31reviews62rating4.29
Users
unchanged since 31.08
60k-70k · 5 readings
2026-09-08: released 4.15.12026-09-10: released 4.16.02026-09-15: released 4.16.12026-09-22: released 4.16.22026-09-29: released 4.17.02026-10-16: released 4.18.02026-10-19: released 4.18.12026-10-20: released 4.19.02026-10-21: released 4.19.12026-10-22: released 4.20.02026-10-24: released 4.20.12026-10-26: released 4.21.02026-10-29: released 4.21.1
  1. 2026-08-3160k
  2. 2026-09-0660k
  3. 2026-10-1770k
  4. 2026-10-2960kreleased 4.21.1
  5. 2026-10-3160k
Rating
unchanged since 31.08
reviewsrating 4.29 · 5 readings
2026-09-08: released 4.15.12026-09-10: released 4.16.02026-09-15: released 4.16.12026-09-22: released 4.16.22026-09-29: released 4.17.02026-10-16: released 4.18.02026-10-19: released 4.18.12026-10-20: released 4.19.02026-10-21: released 4.19.12026-10-22: released 4.20.02026-10-24: released 4.20.12026-10-26: released 4.21.02026-10-29: released 4.21.1
  1. 2026-08-31reviews61rating4.29
  2. 2026-09-06reviews62rating4.29
  3. 2026-10-17reviews62rating4.29
  4. 2026-10-29reviews62rating4.29released 4.21.1
  5. 2026-10-31reviews62rating4.29

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

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

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 4.21.1
  2. Version 4.21.0
  3. Version 4.20.1
Show the remaining 5
  1. Version 4.20.0
  2. Version 4.19.1
  3. Version 4.19.0
  4. Version 4.18.1
  5. Version 4.18.0

What changed recently

  1. Released version 4.21.1 (was 4.21.0)
  2. Package size changed
  3. Released version 4.21.0 (was 4.20.1)
Show the remaining 9
  1. Released version 4.20.1 (was 4.20.0)
  2. Package size changed
  3. Released version 4.20.0 (was 4.19.1)
  4. Released version 4.19.1 (was 4.19.0)
  5. Package size changed
  6. Released version 4.19.0 (was 4.18.1)
  7. Released version 4.18.1 (was 4.18.0)
  8. Package size changed
  9. Released version 4.18.0 (was 4.17.0)

Older entries and the full day by day series are in the app.

The publisher

Mr Violets publishes 11 listings we track, 80k 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 ★ 4.5
  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 ★ 4.5
Show 5 more from this publisher
  1. Deep Tab Search: Tab Switcher & Search Mr Violets · Productivity · Workflow · published 2024-01-09 915 users ★ 3.2
  2. Quilt - Tiling Window Manager Mr Violets · Productivity · Workflow · published 2023-08-08 772 users ★ 5.0
  3. CSS Viewer - Inspect & Copy Any Element's CSS Mr Violets · Productivity · Developer · published 2026-04-10 495 users
  4. Pointer - Element Inspector for DevTools Mr Violets · Productivity · Developer · published 2025-06-25 209 users ★ 3.0
  5. Hintly - AI Meeting Assistant for Google Meet™ Mr Violets · Productivity · Communication · published 2026-10-06 89 users

Like this one

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

  1. Ruler Grid Describes nearly the same job, smaller audience 113 users ★ 5.0
  2. ScreenRuler Describes nearly the same job, smaller audience 112 users
  3. Browser Ruler Describes nearly the same job, smaller audience 97 users
  4. Web Design Ruler Describes nearly the same job, smaller audience 91 users ★ 3.0
  5. DesignKit: Ruler, Inspector, Color, Typography & A11y Toolkit Describes nearly the same job, smaller audience 15 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.

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Users and rating on Ext Ops Panel

Markdown

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HTML

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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