Mobile View: Test responsive designs fast
Developer Tools
Test your responsive designs on multiple devices at once.
Users
20K
Rating
4.2
Reviews
41
7D Growth
0|0%
Cooling signalUnknownHigh-risk permissions
Responsive Website Testing Toolkit - Multiple Viewport Simulator
An essential tool to test the responsiveness of any website on multiple screens simultaneously
Users7KCurrent public install base
Rating4.0Store average score
Reviews20Public review volume
Manifest versionV3Extension platform version
7-day growth-1KNet users gained this week
7-day growth rate-12.5%Relative weekly velocity
Preview
5 assetsResponsive Website Testing Toolkit - Multiple Viewport Simulator Media preview
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7-day rating change
Start
4.00
Latest
4.00
7-day rating change
0.00
2026年7月15日2026年7月21日
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1-day growthNo data
----7-day growthDeclining
-1K-12.5%30-day growthNo data
----Technical snapshot
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Version1.0.0
ManifestV3
Size170KiB
Languages1English
Published
Store updated
Last crawled
English
Overview
Product summary
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Simplify your web development and testing journey with Responsive Website Testing Toolkit, a comprehensive solution built to enhance testing, collaboration, and project organization. An advanced multi-device responsiveness testing tool that empowers developers and designers to work smarter and faster.
Key Features:
1. Test Responsiveness Across Multiple Viewports Simultaneously
Instantly preview your website on multiple devices in real time. Responsive Website Testing Toolkit lets you view layouts on smartphones, tablets, desktops, and more, helping you deliver pixel-perfect designs for every screen size.
2. Sync Mouse Clicks and Scroll Events Across Viewports
Test interactivity like never before! Sync mouse clicks, and scroll events across all viewports simultaneously, ensuring a seamless user experience across devices.
Reviews
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Store average score4.0Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average3.9Average computed only from synced review bodies below
Reviews with text15Synced review bodies
Total ratings / reviews20Chrome Web Store public rating/review count
Store average score: 4.0. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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Really useful tool for checking responsive layouts quickly. I like being able to test multiple screen sizes at once, and the synced scroll/click feature saves a lot of time. Simple, practical, and helpful for web development. Kudos to the developer!
WOW! It's very fantastic.
Very useful for responsive website testing.
Does exactly what it claim. Highly recommend for responsive design testing.
Perfect extension. Have a small problem in mockups. When mockup mode on, it goes to dark mode. no way to disable dark mode when mockups on. Fix it immediately. Thanks.
Ca ne marche pas du tout.. le user agent n'est même pas modifié alors que c'est la base d'un simulateur mobile..
Best tool for website responsiveness testing
This extension is incredibly efficient for testing web responsiveness. It offers an easy-to-use interface and gives you the flexibility to switch between various device profiles without having to manually resize your browser window
An essential extension for developers! great extension
The Multiple Viewport Simulator is responsive and fast. It saves a lot of time when testing for different screen sizes and resolutions.