Sites and apps similar to ScreenSize.net include Responsively, which is free and open source. Other options are Online Ruler, Sizzy, Resizer, by Google and Screenfly. In total there are eight Web Debuggers like ScreenSize.net for Mac, Windows, Linux and self-hosting.
Develop responsive web apps 5x faster! A must-have DevTool for all Front-End developers that will make your job easier.
United States
Ever needed to measure something but found yourself without a ruler? Our online ruler is here to help you solve this problem! It's a virtual ruler that lets you measure small objects in inches or centimeters right on your screen.
An interactive viewer to see and test how digital products respond to material design breakpoints across desktop, mobile and tablet.
Test any website at a multitude of common screen resolutions, including desktop monitors, tablets, and smaller mobile devices.
United States
Responsa is an responsive design tool for testing how designs will look across multiple browsers. The open-source tool is freely available online, with the code being accessible for those seeking a self-hosted solution as well.
A free online ruler that calibrates to your screen's exact pixel density using a bank card, so on-screen measurements match real life.
United Kingdom
Responsinator helps website makers quickly get an indication of how their responsive site will look on the most popular devices.
