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When using a CSS framework it often doesn't matter what devices people use. These frameworks come with their own set of CSS breakpoints with components that work well with those breakpoints. Instead of configuring Polypane to show devices, you can configure it to show the breakpoints supported by the frameworks. Polypane comes with workspace presets for Bootstrap v5, Materialize, Bulma and Tailwin

Media queries are what make modern responsive design possible. With them you can set different styling based on things like a users screen size, device capabilities or user preferences. But how do they work, which ones are there and which ones should you use? Here's the complete guide to media queries. What this guide will go through: What are media queries?How a media query is structuredMedia typ

How does the color contrast checker work?The Polypane color contrast checker checks against values defined by the WCAG 2 (Web Content Accessibility Guidelines) or APCA (the Accessible Perceptual Contrast Algorithm). WCAG give a formula to calculate the contrast, ranging from 1 (no contrast) to 21 (black on white). APCA has a range from minus ~106 to plus ~106. The Polypane contrast checker takes o

A desktop browser with all the tools to preview responsive web design, audit accessibility, SEO and performance. Boost your productivity and streamline testing.