SvelteKit
The official application framework for Svelte. SvelteKit adds routing, SSR, SSG, and API routes to Svelte apps. File-based routing, server/client components, form actions. The standard way to build production Svelte apps. Deploys to Vercel, Netlify, or Node.
Rich Harris / Svelte team · Created SvelteKit in 2021
- New Svelte projects.
- Performance-focused apps (small bundles).
- Content + interactive hybrid apps.
- When you need the largest ecosystem (React/Next.js).
- Teams already on React/Vue.
Definition
SvelteKit is Svelte's meta-framework. File-based routing (src/routes). +page.svelte for pages, +layout.svelte for layouts, +page.server.ts for server logic. Form actions for mutations. Supports SSR, SSG, and SPA modes per route. Adapters deploy to Vercel, Netlify, Node, etc.
Why it exists
Svelte is a component compiler; SvelteKit adds the app framework — routing, SSR, data loading, form handling — so you can build production apps.
How it works
Routes in src/routes. +page.svelte renders pages, +layout.svelte for shared layouts. +page.server.ts loads data server-side. Form actions handle POST. Adapters build for different platforms (Vercel, Node, static). vite-powered dev.
Scaling limits
Smaller ecosystem than Next.js/Remix. Fewer third-party integrations. Svelte 5 migration complexity. Smaller community.
Cost shape
Free and open source.
Alternatives
- Next.js — Bigger ecosystem, more JS shipped.
- Nuxt — Vue-based, similar features.
- Remix — React-based, web-standards-focused.
Failure modes
- Smaller ecosystem.
- Svelte 5 migration.
- Fewer integrations.