Fluent UI

Fluent UI

A cross‑platform UI framework for accessible, consistent experiences.

Website
Design Systems
Component Libraries

Fluent UI is an open‑source design system and component library that provides ready‑made styles, controls, and accessibility features for React, Web Components, and native platforms like Windows, iOS, Android, and macOS. It enables developers to create Microsoft 365‑styled apps with shared code, design tokens, and internationalization, speeding up UI development while ensuring consistency and high performance across all Microsoft products.