What 21st.dev is built with
Read on 2026-10-28 18:40. 19 technologies spotted.
| Technology | Category | Version | Confidence | Tell |
|---|---|---|---|---|
| Cloudflare | CDN | 100% | dns NS: troy.ns.cloudflare.com | |
| Cloudflare DNS | Hosting | 100% | dns NS: troy.ns.cloudflare.com | |
| Facebook Pixel | Analytics | 100% | scripts: ent,'script','https://connect.facebook.net/en_US/fbevents.js'); fbq('init', '27506327459026405'); fb | |
| Google Analytics | Analytics | GA4 | 100% | scriptSrc: https://www.googletagmanager.com/gtag/js?id=G-X7C2K3V7GX |
| Google Tag Manager | Tag managers | 100% | html: me src="https://www.googletagmanager.com/ns.html?id=GTM-T76WQSTW" height="0" width="0" style="display:none;visibility:hi | |
| Google Workspace | Webmail, Email | 100% | dns MX: aspmx.l.google.com | |
| HSTS | Security | 100% | url: https://21st.dev/ | |
| Let's Encrypt | SSL/TLS certificate authorities | 100% | certIssuer: Let's Encrypt, YR1 | |
| Lucide | Font scripts | 100% | dom svg.lucide: <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" str | |
| Next.js | JavaScript frameworks, Web frameworks, Web servers, Static site generator | 100% | headers x-powered-by: Next.js | |
| Open Graph | Miscellaneous | 100% | dom meta[property*='og:']: <meta property="og:title" content="React Components, Templates & Themes — 12,000+ Crafted UI | 21st"> | |
| PWA | Miscellaneous | 100% | dom link[rel='manifest']: <link rel="manifest" href="/manifest.webmanifest"> | |
| PayPal | Payment processors | 100% | dom iframe[src*='paypal.com'], img[src*='paypal.com'], img[src*='paypalobjects.com'], [aria-labelledby='pi-paypal'], [data-paypal-v4], [data-paypal-commerce-button], [data-paypal-smart-button-version], img[alt*='PayPal']: <img src="/landing/logos/paypal.svg" alt="PayPal logo" loading="lazy" decoding="async" class="h-[20px] w-[20px] flex-non | |
| PostgreSQL | Databases | 100% | implied Supabase | |
| Priority Hints | Performance | 100% | dom iframe[fetchpriority], img[fetchpriority], script[fetchpriority], link[fetchpriority]: <link rel="preload" as="image" imageSrcSet="https://cdn.21st.dev/cdn-cgi/image/fit=scale-down,width=384,quality=85,forma | |
| React | JavaScript frameworks | 100% | implied Next.js | |
| Supabase | Development | 100% | scripts: vucvdpamtrjkzmubwlts.supabase.co/storage/v1/object/public/users/user_3KgW | |
| Vercel | PaaS | 100% | headers server: Vercel | |
| Webpack | Miscellaneous | 100% | implied Next.js |
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