shadcn/ui Component Library

shadcn/ui is a collection of beautifully designed, accessible, and customizable React UI components that developers can copy and paste into their applications rather than installing as an npm package. Created by shadcn in 2023, it has rapidly become one of the most popular React UI solutions with over 70,000 stars as of 2026. Key features: copy-paste components (components are not distributed as a package but instead copied directly into the project source code, giving developers full ownership and control to modify any component). Built on Radix UI (accessibility and behavior powered by Radix UI primitives ensuring WAI-ARIA compliance, keyboard navigation, focus management, and screen reader support). Tailwind CSS styling (all components styled with Tailwind CSS utility classes, providing consistent design tokens, dark mode support, and easy customization via CSS variables). Reusable components (Button, Card, Dialog, Dropdown, Form, Table, Toast, Tabs, Accordion, Alert Dialog, Popover, Tooltip, Command Palette, Combobox, Calendar, Date Picker, and over 50 more). Theming system (CSS variable-based theming with HSL color values enabling runtime theme switching, custom color palettes, and design system integration). CLI tool (shadcn CLI for adding components to projects with automatic dependency detection, file placement, and Tailwind configuration updates). Framework support (Next.js, Remix, Vite, Astro, and any React framework with Tailwind CSS). Figma kit (companion Figma design kit with matching component designs and design tokens). Community templates (community-contributed blocks, templates, and themes). TypeScript-first (full TypeScript support with proper types for all component props and variants).