A free tool for designers to quickly test responsive websites.

Start Testing Add to Google Chrome
URL
Local & Remote

Test your sites on both local and remote servers.

LiveReload works too!

Preview
Device Preview

Preview your design in various types of mobile devices.

Drag
Find Breakpoints

Drag the handle to find breakpoints in your design.

Dimenions App Screenshot

What is responsive design?

Responsive web design is a technique used to adapt your layout to different screen sizes. This is achieved through a mix of flexible grids, layouts, images and CSS3 media queries. As the user changes from their laptop to an iPad the website should automatically switch to accommodate the new screen size. In a nutshell the website should have the technology to automatically respond to the users browsing choice.

Using our responsive web design testing tool you can save hours of development time. Just use Dimensions throughout the development of your web design project.