Who 21st.dev is for#
Frontend teams accelerating product UI
Use 21st.dev to find starting components for product screens without buying a paid UI kit or adding a locked package.
Skip if:
Your organization requires a single governed design system package with centralized versioning.
Founders building polished MVPs
Use 21st.dev when you need usable React UI blocks quickly and are comfortable adapting copied Tailwind code.
Skip if:
You need a no-code site builder or finished marketing template instead of application components.
The problem it solves#
Frontend teams lose time rebuilding common product UI: dashboards, forms, pricing pages, auth screens, and interaction patterns. Paid UI kits can speed this up, but they often hide code behind licenses, design-tool bundles, or subscription access.
The practical problem is ownership. Developers want components they can inspect, copy into the codebase, adapt to their design system, and keep without depending on a vendor package.
How it solves it#
Copy-and-paste component registry
Provides UI components that developers can bring into their own React and Tailwind projects instead of installing a black-box component dependency.
shadcn-style workflow
Fits the familiar modern component pattern where source code lands in the app, so teams can edit styles, behavior, and accessibility details directly.
Community-sourced UI blocks
Collects interface blocks from a broader community, giving developers more starting points than a single internal snippet folder.
Strengths and trade-offs#
Strengths
- Code ownership over package dependencyCopying components into the app lets teams adapt the implementation and avoid waiting on a third-party package for every visual or behavior change.
- Good fit for Tailwind teamsThe registry targets React and Tailwind conventions, so it fits teams already using utility-first styling and app-owned component files.
Trade-offs
- -You maintain copied codeOnce a component is copied into an app, updates, bug fixes, and accessibility reviews become the team's responsibility. That is the tradeoff for ownership.
What it's built on#
- Languages
- JavaScriptTypeScript
- Frameworks
- Next.jsReact
FAQ#
What is 21st.dev?
21st.dev is a registry of React and Tailwind UI components for developers who want copy-and-paste component code.
Is 21st.dev a component library?
21st.dev behaves more like a component registry than a traditional package-only library. Developers copy component source into their apps and adapt it.
Who should use 21st.dev?
21st.dev fits React and Tailwind teams that want reusable UI starting points without paying for a proprietary component marketplace.
Similar open-source tools#
Optimo
Optimize and convert images and videos using open formats
Untitled UI React
Open source React UI component library with Tailwind CSS
orca
The ultimate IDE for coding agents
CLI-Anything
Empower AI agents with agent-native CLIs
oh-my-pi
A coding agent with the IDE wired in
Understand-Anything
Interactive knowledge graphs for codebases