Hand-crafted React components and templates — not AI slop
Product Overview
21st.dev is a Y Combinator-backed community registry of production-ready React components and templates built on shadcn/ui, Tailwind CSS, and Radix UI. Browse thousands of curated UI components — from navigation bars and hero sections to AI chat interfaces and data visualizations — install them with a single npx command, and own the code. Features include Magic Chat for AI-powered UI generation from natural language, Magic MCP for component generation directly inside AI IDEs like Cursor and Windsurf, a CLI for semantic search and one-command install, AI variant generation, component publishing, and an Agents SDK for deploying AI agents with sandboxed execution, streaming, and observability. Free tier includes 2 component copies per day and 100 monthly AI credits.
Best For
React developers and design engineers who want production-ready UI components they can install instantly and own, with the option to generate new components using AI coding assistants.
Key Features
- Community registry of thousands of hand-crafted React/Tailwind components
- Magic Chat — AI-powered UI builder from natural language descriptions
- Magic MCP — generate components directly inside Cursor, Windsurf, and other AI IDEs
- One-command install via npx shadcn for any component
- AI variant generation with side-by-side comparison
- Component publishing with auto-detected name, tags, and demo
- Agents SDK with sandboxed execution, streaming, auth, and observability
- Semantic search across components, themes, and templates
- Site clone — recreate any website design from a URL (Pro)
- 2 free component copies per day, 100 free monthly AI credits
Pros
- +Curated quality — real components, not AI-generated noise
- +Own the code with no vendor lock-in or runtime dependencies
- +Works seamlessly with AI coding assistants via MCP
- +Active community with thousands of components and templates
- +Free tier available with generous daily limits
- +Y Combinator-backed with active development
Cons
- -React-only — no support for Vue, Svelte, or other frameworks
- -Requires shadcn/ui and Tailwind CSS setup in your project
- -Quality varies across community submissions
- -Daily copy limit on free tier (2 per day)
/// SPECS
- Pricing:ProFreemembership
- Platform:Web
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