SvelteKit 2 paired with Svelte 5's rune system is one of the most productive full-stack setups available in 2026. Bundles are 35% smaller than Svelte 4, the reactivity model is explicit and composable, and the framework handles routing, server functions, form actions, and auth in a way that feels coherent rather than bolted together.

This guide covers everything you need to build and deploy a real SvelteKit application — from file routing to production auth.

Setup

npx sv create my-app

cd my-app