Your devtools make you fast. Now imagine your entire browser is like that.

Polypane is a fully-featured browser for developers and designers.

Develop, debug and test twice as fast in multiple screens at once, all kept in sync. Make your sites and apps work everywhere with extensive developer tools unrivaled by any browser.

Screenshot of the Polypane application
Screenshot of the Polypane application

Used by teams worldwide

Polypane is the browser for developers and designers that care about the quality of their work.

Develop responsive websites and apps twice as fast and get better results, because you wont be skipping screen sizes and wishing for the best.

Build higher quality websites, whether you use Wordpress, React, Angular, Svelte, Bootstrap, Drupal or any other CMS, library or framework. Polypane fits with any workflow.

Polypane has the right tools built-in for developing, debugging and testing, like devtools extensions, live reloading, accessibility testing and more. Oh, and you still get the Chromium devtools.

Your site is visited on many different devices. With Polypane you build on them too.

Never resize your browser again

Emulate real devices, use your responsive CSS breakpoints or pick your own dimensions. No resizing needed.

Syncs all your actions

Interacting with one viewport means interacting with all of them. Scrolling, hovers, clicks and forms, it just works.

Edit all panes at the same time

Make changes to all panes at once using our Live CSS editor.

Social media previews and meta info

Live previews of how your site looks when shared on social media, and all your meta information visible.

Powerful developer tools

Developer tools like you're used to from Chromium, with support for devtools extensions like React, Vue, Angular, Svelte and more.

Full page screenshots

You want best in class screenshots, and we have them. No other browser comes close in terms of rendering accuracy. We also support screenshots of all your viewports.

Compare full page screenshots

Everything you need to make awesome web experiences

Device emulation, meta previews, handoff tools, CSS breakpoint detection, live CSS editing, side browser, built-in live reloading, dark mode, touch and mobile emulation, dev tools extensions, workspaces and more. Polypane has it all.

Explore all benefits

Developers and designers love Polypane

Here's what they have to say:

Polypane is easily one of the most useful tools for modern web designers and developers.

Stephen HayAuthor of Responsive Design Workflow

It is convenient seeing your work in multiple responsive views at the same time. Love it, đź’Ż

Sara SoueidanIndependent front-end UI engineer, Speaker/Trainer

Polypane is fast, helps me catch issues and the meta information preview is awesome.

Graeme FultonFounder at Letter

Using Polypane and woah this is awesome! It’s really slick and fast! I was just 5 minutes in and I already fixed a bug.

Sergio MatteiFounder at Makerlog

This thing is FAST and the synchronized scrolling works amazingly. Prepare to be impressed.

Vivian GuillenFrontend Developer & Curator at Tailwind Weekly

Discovering Polypane was a game-changer to how I develop responsive websites.

Julian KeenaghanCTO at Beam

Polypane is a smart design environment where you can preview your designs across devices and viewports.

Colm TuiteCreator of Modulz

The first half hour in Polypane solved the frustration I had with responsive design. I really like it.

Nick van den BergFounder at

If you’re developing a website, Polypane comes in quite handy. Already an essential tool.

Roy van RooijenDesign Tools Network

An invaluable tool for responsive website testing. A must-have for front-end developers.

Marc BergerWeb Developer

Polypane quickly became an indispensable part of my workflow. With a tool like this, you have no excuse not to create great, responsive experiences!

Richard GoodwinDeveloper & Podcaster at Comedywham

A vital part of the web development toolkit for testing and troubleshooting responsive design.

John CamachoWeb Developer at Pixelstation

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The browser for developers and designers building amazing sites and web apps.

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