How do I host a React, Vue, or Svelte SPA?

Build locally ( npm run build ) and upload the contents of the output folder ( dist/ or build/ ) — not the folder itself — as a ZIP, with index.html at the root of the archive. Square doesn't build static assets for you : if you want build-on-deploy, use the Node.js runtime running your production server (Express serving dist/ , vite preview , Astro adapter, etc.). For SPAs with client-side routing, rename the build's index.html to vite.html before zipping — Square auto-detects the SPA fallback and any unmatched route falls through to it.

Are HTTP/3 and QUIC enabled?

Yes. Every static app runs behind Cloudflare with native HTTP/3 + QUIC , 0-RTT handshake, and significantly better performance on mobile networks.

Which Cloudflare Premium benefits are included?

Reduced latency via smart routing across datacenters, superior tiered cache efficiency, advanced DDoS protection, automatic SSL/TLS, and on-demand image optimization — all included at no extra cost, with global edge in 300+ cities.

Which special files does Square recognize?

Three files have a special role: index.html is served as the default root entry point; 404.html is served automatically with HTTP 404 status on any nonexistent route (essential for SEO and UX); and vite.html triggers SPA mode — any route not found falls back to it, enabling client-side routing for React, Vue, Svelte, and similar apps built on the Vite idea. No need to manually configure redirects, rewrites, or server rules.

Static sites on the Cloudflare global edge

Native HTTP/3 + QUIC, Cloudflare Premium included, and automatic SSL. Upload HTML/CSS/JS and you're live globally in seconds.

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Why run on Square Cloud

Everything optimized, production-ready.

Native HTTP/3 + QUIC

The web's fastest protocol — 0-RTT handshake and better performance on mobile and unstable networks.

Cloudflare global edge

Your app served from the datacenter closest to each visitor. Low latency on any continent.

Cloudflare Premium included

Argo Smart Routing, Tiered Cache, advanced DDoS protection, and Image Optimization — at no extra cost.

Zero config

Upload your index.html and assets — automatic SSL, HTTP/2, gzip, and brotli ready to use.

Ideal use cases

Where this runtime shines on our platform.

Landing pages and portfolios

Plain HTML, CSS, and JavaScript static sites delivered globally with Cloudflare Premium CDN.

React, Vue, Svelte, and Solid SPAs

Deploy your dist/ or build/ with client-side routing, code splitting, and native HTTP/3.

Next.js export, Astro, and Hugo sites

Static output from any SSG, with pre-rendering, interactive islands, and optimized caching.

Docusaurus and VitePress documentation

Docs sites with client-side search, fast navigation, and instant rendering via global edge.

Decoupled Jamstack frontends

Consuming APIs hosted on other Square runtimes with edge caching and low latency.

PWAs and static blogs

Offline-first apps, catalogs, and blogs with service workers, manifest, and optimized assets.

Technical specs

Everything you need to configure your app.

Accepted extensions: .html
Dependency file: Not required
RUNTIME= aliases: statichtml

Minimal config

Create a squarecloud.app file at your project root:

squarecloud.appStatic

MEMORY=512
DISPLAY_NAME=Meu App

Frequently asked questions about Static Sites

Cloudflare edge, HTTP/3, SPA deploys, and premium benefits included.

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Predictable pricingNo billing surprisesDeploy in secondsHigh availabilityScale with stability24/7 monitoringSSL and security includedDedicated infrastructure