21st

Instantly generate UI components like buttons, navbars, and forms with AI from simple prompts.

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$5Starting price

2.4MMonthly visits

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About 21st

21st is an AI-powered tool that creates UI components on demand for developers and designers. Users describe what they need in plain language, and the tool generates ready-to-use code snippets or design elements. It supports common frameworks and workflows, making it useful for prototyping, building responsive layouts, and iterating quickly. The tool adapts layouts based on prompts, ensuring outputs fit the intended use without manual adjustments. It is designed for frontend developers, UI designers, and software engineers who want to reduce repetitive coding tasks and focus on higher-level design decisions. Teams can use it to standardize components across projects while maintaining flexibility for customization. The platform emphasizes speed and quality, offering curated outputs that align with modern design standards. It is particularly helpful for generating buttons, navigation bars, contact forms, pricing tables, and company logos with minimal effort.

Key features

Generates UI components from text prompts
Adapts layouts automatically based on input
Curated library ensures high-quality outputs
Supports common frameworks like React
Creates responsive design elements
Reduces repetitive coding tasks
Generates buttons, navbars, forms, and logos
Integrates with existing design workflows

Use cases

Create UI buttons and navigation bars from prompts
Design responsive contact forms and pricing tables
Generate company logos and branded assets

Pros

Access to a curated catalog of 12,000+ React components, templates, and themes built by design engineers
Components are provided as AI-ready prompts that integrate directly into workflows via tools like Cursor, Claude Code, or Lovable
Supports shadcn/ui conventions and allows direct code installation into repositories for full ownership and customization
Includes marketing blocks, UI components, shaders, gradients, and animated elements for diverse design needs
Community-driven registry with contributions from over 700 design engineers and support for publishing custom components

Cons

Free tier limits daily component copies, requiring membership for unlimited access and premium features
Components are copied into repositories rather than imported as dependencies, which may require manual updates if underlying dependencies change

Frequently asked questions about 21st

What is 21st?

21st is a community catalog of UI components built by design engineers, including React components, full templates, shadcn themes, shaders, and gradients. Users browse, preview, and copy AI-ready prompts to integrate components into their projects via tools like Cursor, Claude Code, or Lovable.

Is 21st free to use?

Browsing the registry is free, and users receive 2 free component copies daily. Membership unlocks unlimited copies, AI credits for generating and refining UI, and access to premium templates from authors.

How is 21st different from a React component library?

Unlike a component library installed as a dependency, 21st is a registry with multiple authors and styles. Components are copied directly into a user's repository, allowing full ownership and customization without dependency upgrades.

How do I install a component from 21st?

Users can copy the AI-ready prompt for a component and paste it into an AI tool like Cursor, Claude Code, or v0, which rebuilds the component within their codebase. Alternatively, components include a shadcn CLI install command for manual integration.

Do components from 21st work with shadcn/ui?

Yes, components are published in the shadcn registry format and are designed to integrate seamlessly with shadcn/ui primitives and existing design tokens.

Can I publish my own components on 21st?

Yes, anyone can publish components to the registry. Authors retain ownership, and their components appear on their public profile. Template authors can also sell their work directly through the platform.