21st.dev
I originally built this app to organize and reuse interesting React + Tailwind components I came across on Twitter, inspired by the shadcn/ui approach. Later, a friend started contributing their own components, and it got me thinking—this could grow into something bigger, like an NPM for design engineers to share and use components. Would love to hear your thoughts!
21st.dev launched on January 11, 2025 with 1,211 votes, #3 of 6,142 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
21st.dev is a marketplace of UI elements designed for developers building AI websites. Users can browse and copy-paste components from professional design engineers directly into development platforms like v0, Cursor, Bolt, Lovable, and Replit. The platform combines design inspiration with practical code, featuring contributions from over 50 pro design engineers. It also allows developers to publish and share their own design engineering work.
written from the facts on this page · September 2026
From the sources
Make your AI websites look professional & beautiful. Copy-paste UI into v0, Cursor, Bolt, Lovable, Replit from the largest marketplace of UI elements. Get inspired by 50+ pro design engineers. Publish your design engineering work
12,000+ hand-crafted React and Tailwind CSS components, templates, and shadcn themes by real design engineers. Preview live, install with one command — for you and your AI agent.
12,000+ crafted React components, templates, and shadcn themes. Built by real design engineers. Every component ships as a prompt. One copy — and it builds itself in whatever tool you live in. React + Tailwind, shadcn/ui conventions — every component is source that lands in your repo, yours to edit. Bookmark any component into your lists — personal or team-shared — and pull it back up in one click. …and 700+ design engineers shipping shaders , interactions , and a n i m a t e d h e r o e s . Everything you need to know about the registry, installing components, and publishing your own. 21st is a community catalog of UI built by design engineers: React components, full templates, shadcn…from 21st.dev
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