Base UI
by mui
Unstyled, accessible React components for design systems and web apps. From the creators of Radix, Floating UI, and MUI — composable primitives with no bundled CSS.
9,767
May 27, 2026
open-source
Overview
Base UI is a comprehensive library of unstyled UI components for building accessible user interfaces with React. Maintained by the team behind Radix, Floating UI, and Material UI, it prioritizes composability, consistency, and craft without imposing visual opinions — so you can pair it with Tailwind, CSS Modules, or any styling approach, including shadcn-style workflows.
Features
- Unstyled primitives — Buttons, dialogs, menus, comboboxes, and more with full styling freedom
- Accessibility-first — WCAG-oriented patterns, ARIA practices, and broad assistive-tech testing
- Actively maintained — Dedicated team; successor depth to Radix-style APIs with newer components
- MIT licensed — Free for commercial use
- Works with shadcn stacks — Often used as the primitive layer under styled component libraries