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Desktop - Mobile Responsive Testing Tool

Chrome extension by Episyche Technologies · Productivity · Developer

  • Trader

A Chrome extension in Productivity · Developer with 630 users, barely installed.

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

What the developer says, and 5 screenshots

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

Users
630
Rating
4.5 (8 ratings)
Users, last 18 days
+15
Rating, last 30 days
Not watched long enough to say
Version
2.0
Updated in the store
2025-02-24
Published
2024-07-12
Manifest
V3
Browser access
7 permissions, 2 site patterns

How it has moved

Users
+15 since 31.08
615-642 · 9 readings
  1. 2026-08-31615
  2. 2026-09-02629
  3. 2026-09-04624
  4. 2026-09-06628
  5. 2026-09-07635
  6. 2026-09-09642
  7. 2026-09-13635
  8. 2026-09-15632
  9. 2026-09-17630
Rating
-0.06 since 31.08
reviewsrating 4.50-4.56 · 9 readings
  1. 2026-08-31reviews9rating4.56
  2. 2026-09-02reviews9rating4.56
  3. 2026-09-04reviews9rating4.56
  4. 2026-09-06reviews9rating4.56
  5. 2026-09-07reviews9rating4.56
  6. 2026-09-09reviews9rating4.56
  7. 2026-09-13reviews9rating4.56
  8. 2026-09-15reviews9rating4.56
  9. 2026-09-17reviews8rating4.50
Users
+15 since 31.08
615-642 · 9 readings
  1. 2026-08-31615
  2. 2026-09-02629
  3. 2026-09-04624
  4. 2026-09-06628
  5. 2026-09-07635
  6. 2026-09-09642
  7. 2026-09-13635
  8. 2026-09-15632
  9. 2026-09-17630
Rating
-0.06 since 31.08
reviewsrating 4.50-4.56 · 9 readings
  1. 2026-08-31reviews9rating4.56
  2. 2026-09-02reviews9rating4.56
  3. 2026-09-04reviews9rating4.56
  4. 2026-09-06reviews9rating4.56
  5. 2026-09-07reviews9rating4.56
  6. 2026-09-09reviews9rating4.56
  7. 2026-09-13reviews9rating4.56
  8. 2026-09-15reviews9rating4.56
  9. 2026-09-17reviews8rating4.50

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

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

  • Attach to pages the way developer tools do debugger
  • Capture the contents of a tab tabCapture
  • See the address and title of every tab you have open tabs
Show the remaining 4
  • Watch the network requests your browser makes webRequest
  • 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

Episyche Technologies publishes 4 listings we track, 1k users between them. Listed website: webopt.ai.

  1. Webopt - Website Testing Tool Episyche Technologies · Productivity · Developer · published 2024-03-23 622 users ★ 4.6
  2. Website Grammar Checking Tool Episyche Technologies · Productivity · Developer · published 2024-09-12 53 users ★ 3.0
  3. Website SEO Checking Tool Episyche Technologies · Productivity · Developer · published 2024-09-22 5 users

Like this one

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

  1. Preveo – Web Quality & Product Communication Toolkit Describes nearly the same job, smaller audience 4 users
  2. Mobile Lab: Responsive UX UI Checker Describes nearly the same job, smaller audience 13 users
  3. Responsively Describes nearly the same job, smaller audience 51 users
  4. Trailway.ai: Manual Testing Toolkit Describes nearly the same job, smaller audience 9 users
  5. Pixefy - Responsive Design Checker Describes nearly the same job, with an established audience 10k users ★ 4.5

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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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.