A tool for testing responsive websites on multiple devices

What is Sizzy?

Sizzy is an innovative browser extension for Microsoft Edge that is tailor-made for responsive web development. With the click of a button, users can preview their website across multiple devices all at once. This not only enhances the efficiency of testing and debugging but also ensures optimal user experience on every device. This Sizzy Edge add-on merely extends the capabilities of the comprehensive Sizzy app available at

By: Sizzy
Users: 1,646
Rating: 1.00 (1)
Version: 0.0.2 (Last updated: 2020-01-30)
Creation date: 2020-01-30
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
  • activeTab
  • webRequest
  • webRequestBlocking
  • <all_urls>
Size: 40.76K
URLs: Website
Stats date:

Other platforms

Sizzy (v0.0.4)
2.54 (57) 12,105
Not available on Firefox

The responsive design browser

Sizzy is a browser made specifically for responsive development. It allows you to preview a website on multiple devices at once. The Sizzy Edge Extension is only an addition to the app. It adds a button to your toolbar. When the button is clicked, it's going to open the current URL in Sizzy.

You can find the full app at

User reviews
by 胡腾, 2021-03-06
View all user reviews
Risk impact

Sizzy is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Sizzy if you trust the publisher.

Risk likelihood

Sizzy has earned a fairly good reputation and likely can be trusted.

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