A new browser for web developers and designers
Polypane has everything a browser has, plus all the tools you need to build responsive, fast, accessible, and SEO-friendly websites and apps, with multi-viewport synchronised previews and accessibility tooling.
A new browser for web developers and designers launched on May 14, 2019 with 10 votes, #976 of 3,072 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 7 years on.
In plain words
Polypane is a browser designed specifically for web developers and designers. It allows users to view and test multiple website layouts simultaneously, streamlining the design and debugging process across different screen sizes and devices. The tool helps professionals ensure their work displays correctly before deployment to users.
written from the facts on this page · September 2026
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