Polypane. The browser for web developers
Test responsive websites across synchronized viewports
Kilian Valkhof · $9/mo · macOS 15 Sequoia or later
About Polypane. The browser for web developers
Polypane is a Chromium-based browser for web developers, designers, QA teams and marketers. It shows multiple responsive viewports side by side, from mobile screens to 5K monitors, with synchronized scrolling, clicks, hovers, focus and keyboard input.
Built-in tools cover device and media emulation, accessibility audits, layout debugging, metadata, social media previews, web vitals, screenshots and more. Polypane also connects local development environments to external browsers and devices through its Portal feature. A 14-day free trial is available without a credit card.
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