Responsive Website Testing Toolkit - Multiple Viewport Simulator

It's become an essential tool in my development process, especially when preparing my sites for launch. A great addition for any web developer or designer.

Additionally, while it covers the basics of popular devices, some less common screen sizes or customizable options would be a helpful feature. Nevertheless, it’s still a reliable tool for a quick check on your site’s responsiveness.

I appreciate the wide variety of device sizes available, and it’s helped me deliver more polished websites to clients. Highly recommended for mobile optimization!

This extension is great for anyone needing quick viewport tests. It’s super easy to use, and it quickly generates multiple device views, which helps me spot issues on different screen sizes

Multiple Viewport Simulator makes it effortless. It allows me to simulate multiple screen sizes side by side, and I can instantly see how my designs perform across phones, tablets, and desktops.

It’s incredibly accurate and quick to load, so you can test layouts, images, and other elements without switching between devices or emulators

It also automatically updates the layout in real-time, which is great for live testing during development. It’s become an indispensable part of my workflow, and I love how it integrates directly into my browser without slowing anything down.

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

The extension allows me to quickly simulate various screen sizes, from phones to tablets and desktops, all in one window.

I love how this extension lets me preview my website on different screen sizes instantly.