Everything you need in one developer tool.
Powerful devtools, multiple synced viewports, full-height screenshots, over two dozen debug tools, device and media query emulation, built-in live-reloading and more. All in a single, fast and responsive browser for developers and designers.
From mobile screens to 5K monitors, get all viewports in one screen.
Over 80 accessibility tests, 14 different emulators and two dozen tools.
Side by side
Dark and light, reduced motion, screen and print. No more manual switching!
Never resize your browser again
Emulate real devices, use your responsive CSS breakpoints or pick your own dimensions. No resizing needed.
Syncs all your interactions
Your keyboard and mouse interactions are synced between all viewports. Scrolling, hovers, clicks and form input, you only need to do it once.
Powerful developer tools
Developer tools like you're used to from Chromium, with support for devtools extensions like React, Vue, Angular, Svelte and more.
Device emulation, without the hassle
Emulate popular devices with a single click. Touch emulation, toggle network conditions, switch between light and dark modes on the fly and send custom headers for each pane.
Dark mode media query ready
Develop your site in light and dark mode at the same time, both in view and synced together. There is no faster way to build sites with dark and light mode.
Make your browser work for you
Edit all panes at the same time
Make changes to all panes at once using our Elements panel and Live CSS editor. We'll automatically import any Google font you use for quick prototyping.
Get the full overview, your way
Line your viewports up horizontally or vertically, focus in on a single viewport in focus layout or get the classic browser style in our full layout. Your choice.
Handoff right where you need it
Your favorite handoff tools are right inside Polypane, side-by-side with your site or app.
Documentation on the side
Quickly show documentation or references in the side browser, so you don't have to lose sight of your project. That's right, there's a browser in our browser.
Everything you need to make great web experiences in a single app.
Detect CSS breakpoints
Use the CSS breakpoints in your stylesheets to automatically generate viewports for every view your site supports.
Your favorite DevTools extensions
Install and use your favorite devtools, with support for React DevTools, Vue.js DevTools, Redux DevTools, Angular, Svelte and many more.
Intelligent Live and Hot reloading
Live reloading for any development environment, from plain HTML to Wordpress to React or Vue. CSS and images even update without a page refresh.
Debugging an issue becomes quick and easy
Custom debug tools for each pane
Over 25 overlays let you easily check contrast and accessibility, edit your page visually and get insights into your page structure.
Social media previews and meta info
Live previews of how your site looks when shared on social media. All your meta information is visible so you catch typos and missing info in a glance.
Let your browser tell you which links are broken.
Polypane automatically checks all the links on your page and if they're broken, redirect or have referrer issues, we'll let you know.
Build pixel perfect sites
Compare an image with the expected design to your live site with different comparison modes built right in.
* We don't think sites have to be pixel perfect. But getting close is nice.
Testing takes minutes instead of days
See like your users do
Test your website with many different visual impairment simulators, like color blindness and cataracts but also situational impairments like bright sunlight or devices with night mode.
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.
Light and dark modes
Polypane comes in a light and dark theme, so it always fits in with your desktop.
Zoom your entire browser
Sometimes you just need to fit a 4K screen and an iPhone side by side. Zoom individual panes, or your entire browser, to get the view you need.
Plays well with all your favorite frameworks
Support for devtools extensions for JS and easy ways to prototype with your favorite CSS frameworks. Keep your stack, become more productive.
- Tailwind CSS
And much more
Developers and designers love Polypane.
Here's what they say:
Polypane is easily one of the most useful tools for modern web designers and developers.
It is convenient seeing your work in multiple responsive views at the same time. Love it, 💯
This thing is FAST and the synchronized scrolling works amazingly. Prepare to be impressed.
Polypane is fast, helps me catch issues and the meta information preview is awesome.
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.
Polypane is a smart design environment where you can preview your designs across devices and viewports.