The browser for developing responsive & accessible websites.

Developing and designing just got easier. The most powerful browser for web developers. Available on all platforms.

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Great companies using Polypane

Everything you need to test in one, single tool.

Dozens of tools that help you build responsive, accessible and fast websites.

Viewport Sizes

From mobile screens to 5K monitors, get all viewports in one screen.

Accessibility

Over 80 accessibility rules, 14 different emulators and 10+ tools.

Side by side

Dark and light, reduced motion, print. No more manually switching around!

Responsive design has never gone faster

Viewport sizes

Mobile screens, 5K monitors, all your CSS breakpoints or any freeform size. All viewports in one screen, no resizing needed.

Syncs all your interactions

Scrolling, clicking, hovering and typing, it happens in all screen sizes automatically.

Edit all viewports in one go

Make changes to all viewports at once using our Element inspector and Live CSS editor.

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

Polypane has all the tools you need to build great web experiences.

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Social media previews

Pixel-perfect previews of your social media sharing cards. Tips on how to improve them included.

Intelligent Live and Hot reloading
For everyone

Live reloading for any development environment, from plain HTML files to Wordpress to React or Vue. CSS and images even update without a page reload.

Powerful developer tools

The same Developer tools as Chromium. Including support for extensions like React, Vue, Angular, Svelte and more.

Dark mode

Test light and dark mode side-by-side while you build your site. No more manually switching around!

Full page screenshots

Full page screenshots tuned to get the highest rendering accuracy of any browser.

…And that's not all

Polypane has everything you need to make awesome web experiences.

Unlimited Screens

Scroll Syncing

Hover syncing

Grid overlays

Keyboard Syncing

Device Presets

Freeform Resizing

Horizontal Overflow detection

Developer tools

Pixel-perfect Social Media previews

Horizontal Mode

Device emulation

Vertical Mode

Handoff support

Live Reloading

Accessibility Audits

Focus Mode

Page outlines

Live CSS Editing

Full Mode

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 to come!

Full product tour

Build your next project with Polypane

All plans, all features
On Mac, Window and Linux
14-day free trial – no credit card needed

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