A Static Site Generator (SSG) is a tool that generates a complete, static HTML website from source files such as Markdown, HTML templates, or data files. Instead of building pages dynamically at runtime (like in CMSs or server-rendered apps), SSGs pre-generate all HTML pages at build time and serve them as-is.

Typical Workflow

  1. Write Content: Usually in Markdown or another markup language.
  2. Design with Templates: Use HTML/CSS templates to define layout.
  3. Build Site: The SSG compiles content and templates into static HTML files.
  4. Deploy: The generated files are hosted on a static server (e.g., Netlify, GitHub Pages).
Markdown + Templates → [SSG] → HTML files → Static Hosting

Benefits of Static Site Generators

BenefitDescription
SpeedNo server-side processing & pages load quickly.
SecurityNo database or dynamic execution at runtime reduces attack surface.
Version Control FriendlyContent can be stored in Git, enabling collaboration and rollbacks.
Easy HostingCan be hosted on any static file server or CDN.
ScalabilityMinimal server resources required to handle traffic.

Popular Static Site Generators

GeneratorLanguageUse Case
JekyllRubyBlog and documentation (used by GitHub Pages)
HugoGoVery fast builds, great for large sites
GatsbyJavaScript (React)React-based, modern web apps
Next.js (Static Export)JavaScript (React)Hybrid static/dynamic sites
Eleventy (11ty)JavaScriptSimple and flexible for custom setups
PelicanPythonBlog-oriented, Markdown-based
MkDocsPythonProject documentation

Use Cases

  • Developer Blogs
  • Project Documentation
  • Marketing Websites
  • Portfolios
  • Landing Pages
  • Open Source Project Pages

Drawbacks and Limitations

  • No dynamic content at runtime (e.g., comments, login) unless integrated via JS or third-party APIs.
  • Build time increases with site size (especially in large SSGs like Gatsby).
  • Non-technical users may struggle without a CMS unless paired with a Headless CMS.