21st

The unusual bit is the delivery mechanism: every listing comes with a "Copy prompt" button, and pasting that into Cursor, Claude Code, v0 or Lovable has the agent rebuild the component inside your codebase, wired to your existing stack. If you'd rather skip the AI step, each entry also ships a shadcn CLI install command.

A registry, not a dependency

The catalogue runs to 12,000+ components, templates and shadcn themes from 700+ design engineers — Aceternity UI, Magic UI, Origin UI, Base UI, Motion Primitives and hundreds of smaller authors, each with an attributed profile. Everything is published in shadcn registry format, so the source lands in your project rather than arriving as a versioned package you have to upgrade. Coverage skews toward marketing surfaces (animated heroes, shaders, gradients, footers) and general UI (buttons, AI chats, cards, navigation, sign-ins).

Browsing is free with two component copies per day. Membership lifts that limit and unlocks premium templates, which authors sell directly; 21st AI, for generating and refining UI, is a separate monthly credit add-on. Bookmarks can be organised into personal or team-shared lists.