21st.dev

Overview

21st.dev is a comprehensive marketplace and community platform dedicated to high-quality UI components. It serves as a central hub where developers and designers can explore, copy, and remix thousands of React-based components. The platform is specifically designed to accelerate the frontend development process by providing modular, drop-in code snippets that integrate seamlessly with modern workflows.

Key Features

• Extensive Component Library: Access a vast collection of React and Tailwind CSS components ranging from simple buttons to complex UI blocks.
• AI-Ready Integration: Optimized for use with AI coding assistants like v0, bolt.new, and Replit Agent, supporting the "vibe coding" movement.
• Community-Driven: Components are published by a global community of designers and engineers, ensuring a diverse range of styles and functionalities.
• Rapid Prototyping: Copy-and-paste functionality allows for immediate implementation into projects, significantly reducing development time.
• Modular Design: Focuses on reusable, plug-and-play code that fits into existing design systems.

Use Cases

• Frontend Development: Quickly source UI elements for web applications without building from scratch.
• AI-Assisted Coding: Use the components as templates or prompts for AI UI builders to generate full pages.
• Design Systems: Find inspiration or base components for creating consistent brand UI kits.
• Prototyping: Rapidly assemble functional mockups for client presentations or MVP testing.

FAQ

What frameworks does 21st.dev support? The platform primarily focuses on React components, often styled with Tailwind CSS.

Can I use these components with AI tools like v0? Yes, many components are designed to be compatible with AI-driven development tools like v0, bolt.new, and Lovable.

Is there a cost to use the components? Most components are community-shared and available for copying and remixing, though users should check individual license terms if specified.

How do I share my own components? Developers can publish their own UI blocks to the community to build their portfolio or share tools with others.

What is "vibe coding"? It refers to a modern development style using AI agents and natural language prompts to build applications rapidly, which 21st.dev supports through its component library.