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    21st.dev

    Code

    The world's largest React component registry for AI-powered applications. 1.4M developers use it to build AI apps faster with pre-built components, agent templates, and SDK with built-in UI/memory/tools.

    Features & details

    Full overview from our catalog (read-only reference).

    Category (short)
    Code
    Category
    Code
    Pricing (CSV)
    Free Trial
    Directory pricing
    Freemium
    Target audience
    Developers & engineers
    Best for
    Design Engineers & Frontend Developers
    Pricing notes
    Completely free, open source

    Pros & cons

    Editorial notes to help compare fit before opening the vendor site.

    Pros

    • Saves time - pre-built components
    • High-quality free components - professional quality
    • Smooth React/Next.js use - optimized
    • Easy integration - copy-paste
    • Includes 3D components - unique feature
    • Open source - free to use

    Cons

    • Limited to React/Next.js ecosystem - not framework-agnostic
    • Requires React knowledge

    Review notes

    Context from the listing review and editorial research.

    "Best free component library for Next.js developers, saves hours of work"

    Extended features

    In-depth description and capability notes.

    The world's largest React component registry for AI-powered applications. 1.4M developers use it to build AI apps faster with pre-built components, agent templates, and SDK with built-in UI/memory/tools.

    Use cases

    Rapid prototyping - Internal tools - Custom integrations - Continuous development - MVPs - AI app development