Building blocks for AI apps

San Francisco
Joined October 2025
In 30 days, 2,000+ people saved this hero section component One of the most-saved new React components on 21st Copy + paste this into your AI agent 👇
2
14
723
Save this for your next sign in page 👇 1. Sign In 21st.dev/@jahed/components/s… 2. Sign In Card 21st.dev/@jatin-yadav05/comp… 3. Modern & Stunning Sign In 21st.dev/@preetsuthar17/comp… 4. Modern Login & Signup 21st.dev/@pulseawan/componen… 5. Modern Animated Sign In 21st.dev/@arunachalam/compon… 6. Auth Page 21st.dev/@efferd/components/… 7. Travel Connect Signin 21st.dev/@coderislive07/comp… 8. Login Form 21st.dev/@minhxthanh/compone… We curated 139 sign-in and sign-up components on 21st, these are the 8 with the most bookmarks, out of 12,000+ components 1. Open your project in claude/codex/cursor 2. Copy & paste the prompt for the component on 21st into your AI agent 3. See the new sign-in in your app Every sign-in and sign-up below ↓
4
1
14
980
thank you for publishing these on 21st @easemize @jatinyadav_05 @preetsuthar17 @arunachalam1104 @shabanhr @MrMinhthanh
4
99
Pricing UI that makes your SaaS look 10x more expensive Diar Muradi (@diarmuradi) has a library of 27 components built for SaaS: pricing tables, add-ons, FAQs and sign-up screens. Save this before you launch đź”–
1
1
9
676
We built a library of 250+ chat UI components for AI apps All made by design engineers: streaming text, tool-call inspectors, thinking states, permission prompts, artifacts Copy & paste any component into your app Link below ↓
4
1
18
989
If you're a designer, founder or frontend dev, bookmark these 8 pages on 21st 👇 1. Hero sections for your next landing page 21st.dev/community/component… 2. Sign-in pages that don't look like a login 21st.dev/community/component… 3. Pricing sections for launch week 21st.dev/community/component… 4. Shaders, 546 backgrounds that move 21st.dev/community/component… 5. Icons, animated ones too 21st.dev/community/icons?utm… 6. Themes you can paste into any shadcn app 21st.dev/community/themes?ut… 7. Every shadcn registry in one directory 21st.dev/community/shadcn-di… 8. Full site templates, not just sections 21st.dev/community/templates… All of it made by design engineers, 12,000+ components in our collection Copy & paste any of it into your AI agent (claude/codex/cursor) to add it into your app The skill that does it for you is in the reply below
1
6
526
ssych ui (@savvasicevs) Financial UI components: candle charts, watchlists and heatmaps Copy + paste any component into AI to use in your apps If you're building a finance app, save this 🔖 → 21st.dev/@ssychui/library/ss…
2
5
761
3D Testimonials by Sean Hello (@reui_io) React testimonials on a tilted 3D wall that keeps scrolling in an infinite loop. Save this for your next landing page 🔖 → 21st.dev/@sean0205/component…
1
7
415