Polypane

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Polypane is a desktop Chromium browser for developers that shows multiple synchronized viewports and provides tools for responsive testing, accessibility checks, debugging, and layout inspection.

Desktop App for Mac, Windows (PC)

Use Polypane in a dedicated, distraction-free window with WebCatalog Desktop for macOS and Windows. Improve your productivity with faster app switching and smoother multitasking. Easily manage and switch between multiple accounts without using multiple browsers.

Run apps in distraction-free windows with many enhancements.
Manage and switch between multiple accounts and apps easily without switching browsers.

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Polypane is a desktop web browser designed specifically for web developers to enhance the process of creating, testing, and debugging modern websites. It enables simultaneous viewing of multiple screen sizes with synchronized scrolling and interactions, allowing developers to efficiently test responsive layouts across various breakpoints. The browser integrates real-time previews and a suite of accessibility tools to support compliance and improve user experience. Additionally, Polypane offers features such as advanced debugging, a 3D stacking context visualization, form structure outlines, and custom tab color coding to help differentiate environments like local and production.

Focused on improving development workflows, Polypane combines responsive design testing, accessibility audits, and SEO analysis in one platform. Tools like an XML viewer for inspecting structured data and a measurement overlay for precise layout evaluations further extend its functionality. As a specialized development browser built on Chromium, it supports modern web standards and browser extensions, including those using Manifest v3, ensuring compatibility with widespread developer tools.

Overall, Polypane is intended to streamline web development by providing a comprehensive environment for responsive design, accessibility evaluation, and debugging, helping developers work more effectively across multiple devices and screen configurations.

Polypane is a browser for developers and designers with tons of features that help you build websites that are responsive, accessible and of high quality. Key features * Multi-Viewport Display: Visualize your website across multiple viewports simultaneously, referred to as "panes" in Polypane. * Easy Pane Management: Easily manage panes by adding, removing, and resizing them according to your needs. Customize their behavior based on CSS breakpoints, device presets, or create completely freeform panes. * Synced Interactions: Seamlessly interact with all viewports, ensuring synchronized scrolling, hovering, and form input for efficient testing. * Versatile layouts Options: Choose from horizontal, vertical, or focus layouts to tailor your workspace. Switch to the Full layout for a more traditional browsing experience. * Enhanced Testing Tools: Access a variety of tools, including image overlay and media query emulation, to streamline your testing process.

Website: polypane.app

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