The browser for building and testing responsive sites

Create and test responsive websites and apps twice as fast, directly on your desktop.

Watch video [1:20]Why choose Polypane?
Screenshot of the Polypane application
Screenshot of the Polypane application

Creating high-quality websites is a lot of work

Your favorite code editor and design software help you get work done. So should your browser.

Create and test websites faster with a development browser

Create websites and apps faster by developing and testing on multiple devices simultaneously. Debug them using powerful built-in tools.

Explore benefits

Discovering Polypane was a game-changer to how I develop responsive websites. Being able to see how my site looks at multiple breakpoints offers a completely different perspective to my workflow. I couldn't imagine going back to using the Chrome inspector.

Build high quality websites in half the time

Start your free 14 day trial
On Mac, Windows & Linux

Increase your productivity & quality of output

See what Polypane does

Get a true overview of your website or webapp

View multiple panes side-by-side to make sure your site or app looks great everywhere. Panes can be popular devices like phones and tablets, your own CSS breakpoints or any size you neem them to be.

Sync all your actions

Interacting with one device means interacting with all of them. All your mouse and keyboard interactions are synced between all panes. That means scrolling, clicks, page navigation, hover styling and form filling. It just works.

True full page screenshots

Getting sign-off on an implementation is easier than ever. Creating a screenshot of all your panes, a specific part of a page or the entire page takes just a single click. Then send it over to get the OK you want.

Polypane's screenshots are best in class. No one handles viewport units and fixed element as well as us.

Build high quality websites in half the time

Start your free 14 day trial
On Mac, Windows & Linux

Powerful devtools

Polypane has your back when it comes to developing websites. Layout debugging, CSS stress-testing & powerful Chromium devtools with your favorite devtools extensions like the React or Vue devtools. Polypane has all the tools you need to create modern websites and apps built right into the browser.

Live reloading built in

With the built-in live reloading, you no longer have to manually refres. Pages will automatically refresh whenever you change a file and CSS and images are updated without a page refresh, like magic.

Light and dark modes

Polypane comes in a light and dark theme, so it always fits in with your desktop.

That's not all

With more features like focus mode, layout debugging, customisable presets, workspace favorites and global zooming, Polypane offers everything you need.

Explore all benefits


Designers should confront themselves with the reality of different viewports as early and often as possible. Polypane encourages this behaviour, and makes it easy to do. It's easily one of the most useful tools for modern web designers and developers.

Stephen HayAuthor of Responsive Design Workflow

Polypane are building a smart design environment where you can preview your designs across a multitude of browsers, devices and viewports. Another example of a workflow which considers the full context of the target medium.

Colm TuiteCreator of Modulz

If you’re developing a website, Polypane comes in quite handy. Test multiple viewports at the same time, no more browser window resizing, and keep all panes in sync when scrolling in one view. In beta, but already an essential tool.

Roy van RooijenDesign Tools Network

Build high quality websites in half the time

Start your free 14 day trial
Polypane screenshot
By using our site you agree to our privacy policy and disclaimer