The official front-end framework for building experiences that fit seamlessly into Microsoft 365.

Here, you'll find design guidelines and examples for creating Windows app experiences. Windows 11 incorporates Fluent's design language and principles for a cohesive look and feel that's uniquely Microsoft. To get the building blocks for crafting Windows experiences, use WinUI.

Explore the next evolution of Microsoft’s design system, enabling more seamless collaboration and creativity than ever. Move fluidly from design to development, between apps, and across platforms.

Fluent Design is a revamp of Microsoft Design Language 2 (sometimes erroneously known as "Metro", the codename of Microsoft Design Language 1) that includes guidelines for the designs and interactions used within software designed for all Windows 10 and Windows 11 devices and platforms.