Polypane

Polypane is a cross-platform standalone browser designed specifically for web developers to build better responsive, accessible, and performant websites and web applications faster. It offers synchronized side-by-side views across multiple viewport sizes from mobile screens to 5K monitors, real-time linting for structure, metadata, and accessibility, and synchronized interactions like click, scroll, and hover across all views. Polypane streamlines responsive web design and development by combining essential debugging and testing tools in one environment.

platform:windows platform:macos platform:linux form:desktop-app form:browser form:saas feature:responsive-design feature:accessibility-testing feature:performance-testing feature:linting feature:synchronized-scrolling feature:real-time feature:debugging use-case:productivity use-case:testing target:developers