Introduction

What is Prototyper UI?

Prototyper UI is a collection of beautifully designed, accessible components built on Base UI and styled with Tailwind CSS v4. Components are copied into your project as source files, so you own and control every line of code.

Install any component with a single command:

npx shadcn@latest add https://prototyper-ui.com/r/button.json

The component lands in your codebase as a real file you can read, edit, and extend. No runtime dependency, no version lock-in, no abstraction layer to fight.

Features

• Built on Base UI for accessible, unstyled primitives
• Styled with Tailwind CSS v4
• Dark mode support
• Themeable with CSS variables
• shadcn-compatible registry
• LLM-friendly source, catalog, and documentation endpoints

Dependencies

Components are built with:

• Base UI — Unstyled UI primitives
• Tailwind CSS v4 — Utility-first CSS
• class-variance-authority — Variant management
• tailwind-merge — Class merging