One browser. Every screen.
For devs who care.

A desktop browser for web devs who sweat the details. Built to boost productivity and streamline testing for responsive design, accessibility, and SEO all in one place.

Try Polypane for free 14 day trial. No credit card needed.

Polypane showing six different panes in one overview, emulating different devices and viewports

Polypane showing the same site in light mode, dark mode, forced color mode and reduced motion. The emulation settings are open showing additional options.

Polypane showing a single site with its landmarks highlighted as well as a focus trail rendered across the page. An opened sidebar shows the heading structure of the page.

Polypane with an opened sidebar showing the meta information of a page: title, description as wel as og tags and other meta data. The top of a social media card preview for Bluesky is visible.

Polypane showing three panes, with a sidebar containing the element inspector. The H1 element that's selected is highlighted in all panes. The sidebar shows the CSS properties and box model of the selected element.

Devs at these companies use Polypane

Go from “just working” to Crafted with care.

A desktop browser purpose-built for modern web developers. From real-time responsive previews to in-depth accessibility and SEO testing, it brings everything you need into one streamlined environment.

Responsive design

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

Lint as you go

Check your structure, metadata and accessibility. Get instant suggestions.

Side by side views

Test dark and light and more without changing your system settings.

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

Vivian Guillen - Frontend Dev, Curator at Tailwind Weekly

Polypane is really saving my bacon. Kilian knocked it out of the park, this is my new favorite development tool.

Scott Tolinski - Syntax.fm host, Level Up Tutorials

Polypane helped me see a spacing issue between two breakpoints that I wasn’t aware of. Love it 💯

Sara Soueidan - Front-end UI engineer, Speaker/Trainer

I've started playing around with Polypane and 🤯. It has awesome debugging tools, I'm really impressed.

Kevin Powell - CSS Evangelist