Polypane

Polypane is a Chromium-based browser built for web developers and designers to build, test, and debug websites across multiple viewports and devices. - Simultaneous multi-viewport rendering and synchronized interactions for all breakpoints - Built-in accessibility auditing and instant feedback on issues - Emulates devices, browsers, user agents, locales, touch events, safe area insets, and network conditions - Screen capture, annotation, and video recording within the app - Meta panel for pixel-perfect social media share card previews in light and dark modes - Supports sharing local development environment for real-time testing on remote devices and browsers Polypane offers a 14-day free trial with full feature access and requires a paid subscription after the trial. It supports Windows, Mac, and Linux with licenses for individuals, teams, and enterprises.