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ViewportLab Responsive Tester

Chrome extension by ApexLabs · Productivity · Developer

A Chrome extension in Productivity · Developer with 14 users, barely installed. Audience over the last 30 days: +6.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 1 screenshot

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

Users
14
Rating
not rated yet
Users, last 30 days
+6
Version
1.1.5
Updated in the store
2026-07-07
Published
2026-06-26
Manifest
V3
Browser access
6 permissions, 1 site pattern

How it has moved

Users
+6 since 03.10
8-14 · 14 readings
  1. 2026-10-0410
  2. 2026-10-0811
  3. 2026-10-0912
  4. 2026-10-1011
  5. 2026-10-1312
  6. 2026-10-1613
  7. 2026-10-1912
  8. 2026-10-2113
  9. 2026-10-2212
  10. 2026-10-2510
  11. 2026-10-2611
  12. 2026-10-3012
  13. 2026-11-0113
  14. 2026-11-0214
Users
+7 since 01.09
6-14 · 22 readings
  1. 2026-09-017
  2. 2026-09-046
  3. 2026-09-067
  4. 2026-09-076
  5. 2026-09-097
  6. 2026-09-176
  7. 2026-09-2010
  8. 2026-09-258
  9. 2026-10-0410
  10. 2026-10-0811
  11. 2026-10-0912
  12. 2026-10-1011
  13. 2026-10-1312
  14. 2026-10-1613
  15. 2026-10-1912
  16. 2026-10-2113
  17. 2026-10-2212
  18. 2026-10-2510
  19. 2026-10-2611
  20. 2026-10-3012
  21. 2026-11-0113
  22. 2026-11-0214

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

Every site you visit. This extension can read and change the content of any page you open.

  • See the address and title of every tab you have open tabs
  • Block or redirect requests by rules it declares in advance declarativeNetRequest
  • Run its own code on the pages it can access scripting
Show the remaining 3
  • Act on the current tab, but only after you click it activeTab
  • Open a panel beside the page sidePanel
  • 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

ApexLabs publishes 20 listings we track, 522 users between them.

  1. Human Auto Typer ApexLabs · Productivity · Tools · published 2026-06-18 195 users
  2. ScoreWise SofaScore Football Match Insights ApexLabs · Productivity · Tools · published 2026-06-11 96 users
  3. SoccerIQ Flashscore Live Match Prediction ApexLabs · Lifestyle · Entertainment · published 2026-06-24 51 users
Show 5 more from this publisher
  1. PixelTrim - Image Crop & Photo Editor ApexLabs · Productivity · Workflow · published 2026-06-29 34 users
  2. Extension Security Checker - Chrome Permission Scanner ApexLabs · Productivity · Tools · published 2026-06-12 27 users
  3. PageQuill - Web to Markdown Converter ApexLabs · Productivity · Developer · published 2026-06-24 21 users
  4. MailDock Temporary Email ApexLabs · Productivity · Tools · published 2026-07-05 16 users
  5. Float Video Player ApexLabs · Productivity · Tools · published 2026-06-18 15 users

Like this one

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

  1. Viewport Lab Describes nearly the same job, smaller audience 10 users
  2. Rocket Viewport Describes nearly the same job, smaller audience 6 users (last published figure)
  3. Responsive Lab Describes nearly the same job, smaller audience 25 users
  4. Viewport Lab Describes nearly the same job, smaller audience 3 users
  5. Viewport Lab Describes nearly the same job, smaller audience 4 users

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 2026-11-02. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built