The browser for building responsive & accessible websites.

Develop responsive and accessible sites faster with a standalone browser. Improve your web dev workflow with a browser that helps you at every step of the process.

Why Polypane

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.

Viewport Sizes

Mobile screens to 5K monitors, get all viewports in one overview.

Accessibility

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!

Great companies are using Polypane.

Syncs all your interactions.
Give it a try

Click, hover, scroll or type. All interactions are synced between all your viewports.

https://localhost:3000
(imagine a menu here :)
Polypane syncs everything between panes.
ScrollingScroll in one pane, scroll in all.
MouseClicks and hovers happen everywhere.
KeyboardOnly test your forms once.
Create as many panes as you needFind the overview that works for you. Store your favorite configurations in workspaces and share them with your team.
Resize panes whenever you want.Use our device presets, your own CSS breakpoints or freeform resize panes right on the main canvas.
Synced element inspector and consolePolypane has an element inspector and fully functional console that works across all panes, so you dont do double work.
Dozens and dozens of debug toolsLayout debugging, color blindness testers, build-in live reloading, screenshotting, device and media emulation...The list goes on.
Polypane has everything you need
to create amazing websites and webapps
Start your free trial
(imagine a menu here :)
Polypane syncs everything between panes.
ScrollingScroll in one pane, scroll in all.
MouseClicks and hovers happen everywhere.
KeyboardOnly test your forms once.
Create as many panes as you needFind the overview that works for you. Store your favorite configurations in workspaces and share them with your team.
Resize panes whenever you want.Use our device presets, your own CSS breakpoints or freeform resize panes right on the main canvas.
Synced element inspector and consolePolypane has an element inspector and fully functional console that works across all panes, so you dont do double work.
Dozens and dozens of debug toolsLayout debugging, color blindness testers, build-in live reloading, screenshotting, device and media emulation...The list goes on.
Polypane has everything you need
to create amazing websites and webapps
Start your free trial
(imagine a menu here :)
Polypane syncs everything between panes.
ScrollingScroll in one pane, scroll in all.
MouseClicks and hovers happen everywhere.
KeyboardOnly test your forms once.
Create as many panes as you needFind the overview that works for you. Store your favorite configurations in workspaces and share them with your team.
Resize panes whenever you want.Use our device presets, your own CSS breakpoints or freeform resize panes right on the main canvas.
Synced element inspector and consolePolypane has an element inspector and fully functional console that works across all panes, so you dont do double work.
Dozens and dozens of debug toolsLayout debugging, color blindness testers, build-in live reloading, screenshotting, device and media emulation...The list goes on.
Polypane has everything you need
to create amazing websites and webapps
Start your free trial

Polypane helps with every aspect of web development.

Get the full overview of viewports, meta info, accessibility issues and media features. Fix issues before they happen.

As many viewports as you need.

No need to manually resize and test websites screen-by-screen. Get all your viewports in one overview, no browser resizing needed.

Mobile screens, 5K monitors, all your CSS breakpoints or any size you want.

All in sync.

Scrolling, clicking, hovers, shortcuts and forms input are synced across all viewports.

Don't test viewports or devices one-by-one, check them all at once.

Accessibility for everyone.

Test your page for color contrast issues, common accessibility mistakes, simulate color blindness and other visual deficiencies. Optimize your site for everyone.

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.

Stephen Hay Author of Responsive Design Workflow

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

Sara Soueidan Independent front-end UI engineer, Speaker/Trainer

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

Vivian Guillen Frontend Developer & Curator at Tailwind Weekly

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

Graeme Fulton Founder 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 Mattei Founder at Makerlog

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

Colm Tuite Creator of Modulz

Read more testimonials

Social media previews.

Pixel-perfect previews of social media sharing cards, for Twitter, Facebook, Slack, LinkedIn, Discord, Telegram and Google.

Live and hot reloading.

Built-in live reloading for anything from plain old HTML to Wordpress to React or Vue. No config or server needed.

Dark mode media query testing.

No need to change your entire operating system! Test light and dark mode side-by-side in the same view. Also works for reduced motion, reduced data and even print styles.

Your favorite DevTools extensions

Install and use your favorite Chromium devtools, with support for React DevTools, Vue.js DevTools, Redux DevTools, Angular, Svelte and many more.

Screenshots in a single click.

Full height, viewport or overview screenshots with unrivaled accuracy, in a single click.

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.

  • React
  • Vue
  • Angular
  • Svelte
  • jQuery
  • Tailwind CSS
  • Bootstrap
  • Foundation
  • Bulma

…And that's just scratching the surface.

Polypane has everything you need to make awesome web experiences.

Unlimited Screens
Scroll Syncing
Hover syncing
Grid overlays
Unified console
Keyboard Syncing
Device Presets
Freeform Resizing
Horizontal Overflow detection
Developer tools
Pixel-perfect Social Media previews
Four layout modes
Device emulation
Handoff support
Live Reloading
Accessibility Audits
Page outlines
Live CSS Editing
Color Blindness Simulators
Full Page Screenshots
Visual design diffing
CSS Breakpoint Detection
Overview Screenshots
Touch emulation
Devtools Extensions
Custom Headers
Dark Mode
Workspaces
…and more added monthly!

Full product tour

Build your next project with Polypane

  • Try all plans, all features
  • On Mac, Window and Linux
  • 14-day free trial – no credit card needed
Start free trialView pricing