# What's Sample.app **Sample.app** is a hosting platform for static sites. You deploy with the `samplex` CLI and get a shareable preview URL in seconds. How it works [#how-it-works] You build your project locally—React, Vue, Angular, Astro, Hugo, whatever outputs static files—and run `samplex deploy`. The CLI compresses your build output, uploads it, and your site is live. No server configuration. No CI pipelines required. No containers. What it's good for [#what-its-good-for] * **Preview deployments**—share work-in-progress with your team or clients * **Side projects**—ship a personal site or portfolio without infra overhead * **Documentation sites**—deploy static docs from any generator * **Prototypes**—get something in front of people fast What it's not [#what-its-not] Sample.app hosts static files only. If your app needs a server (SSR, API routes, databases), you need a different platform for those parts. That said, most modern frameworks can output static files—check the [Framework Guides](/deploying) to see how. Key features [#key-features] * **Instant deploys**—upload and go, no build step on the server * **SPA fallback**—client-side routing works automatically * **Preview URLs**—every deploy gets a unique `https://.sample.app` URL * **CLI-first**—everything happens from your terminal * **100 MB limit**—plenty of room for most static sites