Fast Svelte Static Site X – SSG/SSR focused on SEO for multi-million pages websites

This framework is built to deliver fast generation of millions of pages and reduce deployment costs, while providing great development experience.

npm install -g sssx


Definition Abbreviation
Svelte Static Site Generator SSSG
Svelte Server Side Rendering SSSR


YouTube demo


Why another SSG?

This project was created from the need to manage sites with millions of pages, with making static site generation a primary use case, and SEO optimisation its first goal.


This framework was created to address several things that are lacking in current frameworks:

  1. SEO first
  2. Links and URLs first
  3. Designed for websites with millions of pages


  • 🦕 First-class Deno support
  • 📈 Incremental updates sssx build <url>.
  • 🚀 It's fast! 1000ms or less spent on building each page.
  • 👍 Each page is it's own SPA. Fully autonomous.
  • 💦 Hydration using Svelte components.
  • 📦 Small size of JavaScript overhead, thanks to Svelte.
  • 💪 ESM first, no more enormous CommonJS bundles, thanks to Esbuild.
  • 🕸️ Out of box SEO features: metatags, i18n, web vitals, robots, sitemap, etc.
  • 🏠 Host anywhere. It's just HTML files with bunch of CSS and JS files.
  • ⚡️ You can generate one URL or millions. No need to rebuild whole website each time.
  • 😎 Development Experience is our priority!

Cluster mode

To run SSSX in cluster mode to use all available CPU cores use the following command:

sssx cluster

Here's a demonstration of generating 1000+ URLs under 30 seconds:


When you render millions of static pages, you don't want to rerender all of them each time. SSSX enables you to finetune which pages has to be updated and when.


This repository is structured as a monorepo and uses workspaces.


  • sssx main package
  • example Example website project built with SSSX

Getting started

To run an example project use the following:

cd apps/example-blog
npm install
npx sssx dev open


cd packages/example
../sssx/src/cli.ts dev open

Thank you

Inspirations are drawn from:


Copyright © 2022-2024 Eugene Hauptmann


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