21st
21st.dev is an open-source community registry and marketplace for shadcn/ui-based React components, serving as the npm for design engineers who want to publish, discover, and install minimal, modern, and reusable UI components.
- Author
Serafimcloud- Updated
- Live demo
- 21st.dev (opens in a new tab)
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About
About 21st.dev
Inspired by shadcn/ui's philosophy, this platform provides a comprehensive collection of high-quality React components, blocks, and custom hooks powered by Tailwind CSS and Radix UI primitives, all installable with a single npx shadcn command. The registry emphasizes TypeScript support throughout, offers multiple live demos for each component to showcase different variations and use cases, and maintains a community-driven curation process ensuring component quality and consistency. Developers can browse components by category, search for specific functionality, preview components with interactive examples, and install them directly into their projects with full source code access for customization.
Perfect for design engineers and React developers looking to accelerate UI development, 21st.dev eliminates the need to build common components from scratch by providing battle-tested, production-ready implementations that follow modern React patterns and accessibility best practices. The marketplace includes everything from form components and navigation elements to complex data visualizations and interactive widgets, making it an invaluable resource for teams building Next.js applications, design systems, and component libraries with shadcn/ui as their foundation.
Get started
Free, open source, and ready to ship.
Clone the repo, install dependencies, and start customising. 21st.dev is free and open source: its license is in the repository.
- Clone the 21st.dev repository from GitHub.
- Run
npm installorpnpm installto install all required packages. - Run
npm run devto start the development server and begin customizing. - Check the repository’s README and license before you ship.
Terminal
$ git clone https://github.com/serafimcloud/21st $ cd 21st $ npm install $ npm run dev
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FAQ
Frequently asked questions
Everything you need to know before you ship with 21st.dev.
21st.dev is an open-source community registry and marketplace for shadcn/ui-based React components, serving as the npm for design engineers who want to publish, discover, and install minimal, modern, and reusable UI components. It is an open source template in the shadcn.io collection of 215.
21st.dev is made by Serafimcloud, an independent developer; shadcn.io lists it but did not make it. Serafimcloud has 1 template in the collection, and the author's page lists them.
The listing tags 21st.dev with Next.js, React, Tailwind and UI Kits & Component Libraries. Those are its categories, not a dependency list: the exact packages and versions are in the repository's package.json.
Yes. The 21st.dev page embeds its live demo from 21st.dev, and links to it so you can open the real deployment before you clone.
The 21st.dev listing was last updated on October 8, 2025. That date is the listing's, not the repository's: check the repository's commits for recent activity.
Clone the repository (git clone https://github.com/serafimcloud/21st), then follow the README. The 21st.dev page shows the usual steps and a terminal block with the commands to copy.
Install dependencies with npm install or pnpm install, then run npm run dev. The README in the 21st.dev repository says which package manager and environment variables it needs.
No. 21st.dev is cloned from its own GitHub repository, so shadcn.io isn't involved. Browsing the page and its live demo need no account either; Pro adds the premium templates, the blocks and the MCP server.
21st.dev is tagged Next.js, so it deploys wherever a Next.js app does, such as Vercel, a Node.js server or a container. Its README may add steps for its own services.
The 21st.dev listing doesn't record a license. Check the LICENSE file in its repository (https://github.com/serafimcloud/21st), and ask the author if there isn't one.
That depends on 21st.dev's license in its repository, which shadcn.io does not set. Read the LICENSE file before you use it in a client or paid project, and ask the author if it is unclear.
Attribution follows 21st.dev's license. Many permissive licenses ask you to keep the copyright notice and license text in your copy; its LICENSE file says exactly what.
No. The Pro license covers shadcn.io's own Pro code, blocks and premium templates. 21st.dev is the author's project, under the terms in its repository.
Serafimcloud supports 21st.dev, through its GitHub repository: read the docs, open an issue or look for discussions. shadcn.io does not maintain it.
Yes. Once you clone it, 21st.dev is your own code: change the theme, add pages and connect your backend. It uses shadcn/ui, so you can also add more components the same way.
Yes. Components are free with a free account and the blocks are in Pro; both are copied into your project with the shadcn CLI. Check that 21st.dev uses Tailwind CSS and the shadcn/ui setup (a components.json) before you add them, and pick the base library your project already uses.
Yes, with Pro. The shadcn.io MCP server's search_templates tool finds templates by what they are, and returns each one's repository and live demo, so your editor can set up 21st.dev for you. Your files stay on your machine.
The collection has 19 other open source UI Kits & Component Libraries templates like 21st.dev, shown at the foot of its page with the ones sharing most categories first. All of them are at /template/category/ui-kits-and-component-libraries.
Serafimcloud has no other templates in the collection.
Yes. The 14 premium templates (Solaris, Reframe Labs, Spherule and Max and more) are built by shadcn.io and come with every Pro plan, if you want maintained code with a design file.
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