What Is Static Site Generation (SSG)?
Quick Definition
Static Site Generation is a method of building websites where all pages are pre-rendered at build time into static HTML files, resulting in extremely fast load times and simple hosting.
Static Site Generation (SSG) creates all of a website's pages during a build step, before any user visits the site. The result is a collection of plain HTML, CSS, and JavaScript files that can be served directly by a CDN without any server-side processing per request.
Unlike dynamic websites that generate pages on every request (SSR) or in the browser (CSR), static sites are pre-built. When a user visits a page, they receive a pre-made HTML file instantly. This eliminates server processing time and database queries, resulting in the fastest possible load times.
Popular static site generators include Next.js (which supports both SSG and SSR), Gatsby, Hugo, Eleventy, and Astro. These tools take your content (from markdown files, a CMS, or an API) and templates, then generate a complete website during the build process.
SSG is ideal for websites where content doesn't change with every request: blogs, documentation sites, marketing websites, landing pages, and portfolio sites. For content that changes frequently, many SSG frameworks support Incremental Static Regeneration (ISR), which rebuilds only the pages that need updating.
Why It Matters
Static sites are the fastest, most secure, and cheapest to host. Since there's no server processing or database, there's nothing to hack and nothing to slow down. They can be hosted on a CDN for pennies per month and handle millions of visitors without performance degradation.
For businesses, this translates to better user experience, higher conversion rates, reduced hosting costs, and fewer security concerns. If your website's content doesn't need to be dynamically generated per request, SSG is often the smartest choice.
Real-World Examples
A documentation site with 5,000 pages built with SSG loads every page in under 200ms because there's zero server processing, just serving pre-built HTML from a CDN
A marketing agency switched their client websites from WordPress to a static site generator, reducing hosting costs by 90% while improving page speed scores to near-perfect
A blog with 1,000+ articles uses SSG with incremental rebuilds, adding new content in seconds without regenerating the entire site
A landing page built with SSG achieved a 99/100 Lighthouse performance score out of the box, compared to 62/100 for the previous dynamically-generated version
Related Terms
Server-Side Rendering (SSR)
Server-Side Rendering is a technique where web pages are generated on the server for each request, delivering fully-formed HTML to the browser for faster initial page loads and better SEO.
CDN (Content Delivery Network)
A CDN is a network of geographically distributed servers that delivers web content to users from the server closest to them, reducing load times and improving reliability.
Single-Page Application (SPA)
A Single-Page Application is a web application that loads a single HTML page and dynamically updates content as the user interacts with it, without requiring full page reloads.
CMS (Content Management System)
A CMS is software that allows users to create, manage, and modify content on a website without needing to write code, providing an intuitive interface for content publishing.
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