Responsively
Develop responsive web-apps 5x faster
Responsively launched on May 16, 2020 with 458 votes, #25 of 4,813 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 6 years on.
In plain words
Responsively is a web browser designed to speed up responsive web app development by displaying multiple screen sizes simultaneously in a single window. It lets developers preview how their applications appear across different target devices side-by-side, eliminating the need to switch between separate browser windows or devices. Built to work with familiar browser developer tools, it requires no additional setup or learning, making it accessible to developers already comfortable with standard web development workflows.
written from the facts on this page · September 2026
From the sources
A web browser that aids responsive web app development. Preview all target screens in a single window side-by-side. Brings down your development time. Use your already-familiar dev-tools from the browser. No additional learning curve!
A dev-tool that aids faster and precise responsive web development.
A must-have DevTool for all web developers that will make your job easier. And it's free and open source too! 🎉 Everything you need to create pixel-perfect, responsive websites with ease. See all devices at once, side-by-side. No more fiddling around with the devtools resizer. It's all there, at a glance. Any click, scroll or navigation that you perform in one device will be replicated to all devices in real-time. Save your favorite device combinations as Preview Suits and quickly switch between them when you're testing. Responsively comes with a large collection of device profiles out of the box. You can also add your own custom devices. See all devices at once, side-by-side. No more…from responsively.app
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