Based on our record, Multi Screen Test seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You could try using a percentage for the width instead of a number. That way, it'll stretch to be a percentage of the screen size (or whatever container it's in) instead of the same amount of pixels on every screen. By the way, you can use this site http://whatismyscreenresolution.net/multi-screen-test to test how your site looks on various screen sizes. It's a little outdated and a lot of the screen sizes aren't... Source: about 2 years ago
Responsive Viewer - View multiple screen dimensions in one view
One Click Test - Tool for quickly testing your design layout in one click.
Responsinator - Designed to test responsive websites on different devices.
XPRS - Free website builder - making web design like Lego™. No code
Responsive Website Test - Test any website on desktop, mobile, and tablet
Dimensions Toolkit - Chrome Extension for designers to test responsive websites.