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Responsive Website Testing Toolkit - Multiple Viewport Simulator icon

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

Responsive Website Testing Toolkit - Multiple Viewport Simulator Media preview

5 assets
Trend

User growth trend

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User Growth Over Time

6.9K7.2K7.5K7.8K8.1K2026年7月15日2026年7月18日2026年7月21日Latest: 7K
Rating trend

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7-day rating change

Start
4.00
Latest
4.00
7-day rating change
0.00
3.903.954.004.054.102026年7月15日2026年7月18日2026年7月21日Latest: 4.00
2026年7月15日2026年7月21日
Growth overview

Daily, weekly, and monthly growth

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1-day growthNo data
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7-day growthDeclining
-1K-12.5%
30-day growthNo data
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Technical snapshot

Version, languages, and crawl freshness

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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

Recent review snapshot

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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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Rita Sylvester2024年12月15日
5

No more toggling between devices or resizing the window repeatedly. i love it

Version 1.0.0Language en
Tom Clay2024年12月14日
5

Not only does it work well with Chrome, but it also integrates with other browsers flawlessly. This ensures consistent results across platforms. It’s an essential addition to any web developer's toolkit.

Version 1.0.0Language en
Handful OfScrubs2024年12月11日
1

Suspicious permissions requiring access to all websites and complete control over downloads

Version 1.0.0Language en
1 helpful · 1 not helpful
Sammi Grogh2024年12月11日
1

Why does it need to access all the data on all websites when it only needs access to the tab I want to test?

Version 1.0.0Language en
2 helpful · 1 not helpful
Probably Raging2024年12月10日
1

**DOWNLOAD WITH CAUTION** This extension requests access to "read and change all your data on all your websites" as well as "manage your downloads", as it uses the `<all_urls>` host permission, and the `downloads` permission, which I believe to be overkill for the extension's use case, and a major security risk if the extensions was used maliciously. A better alternative would be the `activeTab` permission and using a combination of `createObjectURL()` and `<input type="file">` for importing/exporting files. I will change this rating to 5-stars if the developer can remedy these insecurites. EDIT: The deveoper is trying to justify the use of excessive permissions in a reply to this review even though I gave them really simple alternatives which are available, and would accomplish the exact same thing. I've seen this type of behaviour before from developers of extensions that start out legit, and quickly become credential farmers, browser hijackers, etc.. In response to the developers response, your permission are overkill, uneeded, and unsafe. There very very few use cases where `<all_urls>` and `downloads` permissions are required, and yours is not one of them. Your permissions are dangerous and need to be change, and any users installing this extension need to do so with caution, or use an alternative that accomplish the same thing without intrusive permissions. Developer says that all extensions similar to use this use the same permissions, which is incorrect. Here are some safer alternatives with friendy permissions: - https://chromewebstore.google.com/detail/responsive-viewer/inmopeiepgfljkpkidclfgbgbmfcennb - https://chromewebstore.google.com/detail/responsive-buddy/pkpodanfippddohhfchdmebebbepjkkf - https://chromewebstore.google.com/detail/responsive-tester/ppbjpbekhmnekpphljbmeafemfiolbki Google's own advice regarding permissions: 1. https://developer.chrome.com/docs/webstore/review-process#review-time-factors Host permissions patterns like *://*/*, https://*/*, and <all_urls> give extensions extensive access to the user's web activity, especially when combined with other permissions. Extensions with this kind of access can collect a user's browsing history, hijack web search behavior, scrape data from banking websites, harvest credentials, or exploit users in other ways. 2. https://developer.chrome.com/docs/extensions/reference/api/downloads Use the chrome.downloads API to programmatically initiate, monitor, manipulate, and search for downloads. <-- there are safer alternatives that allow users to download stuff and that don't allow the developer to initiate downloads with free will, and monitor all other download activity. 3. Privacy policy or not, your current excessive permissions leave users open to serious exploits should your extension ever be compromised and used maliciously. A privacy policy doesn't protect users from that. Not a hater, the main idea of the extension is great, it's only the unsafe excessive use of permissions that I have a problem with. I'm just a concerned dev who has seen people be burnt by this exact same bad practice too many times before.

Version 1.0.0Language en
1 helpful · 1 not helpful