shadcn/ui
Copy-in React components you own and edit as your own UI kit
What it is
shadcn/ui is a collection of React components built on Tailwind CSS and headless primitives like Radix UI, delivered as source code that a CLI copies into your project rather than as a package dependency. Because the code lives in your repo, you can restyle, extend, or rewrite each button, dialog, form, and table freely. Frontend developers working with Next.js, Vite, TanStack, or Laravel use it as a starting point for their own design system, and the registry format also feeds AI tools that generate interfaces.