Jekyll: The Original Static Site Generator

What Is Jekyll?

Jekyll is a static site generator written in Ruby that transforms plain text (Markdown, Textile) into static websites and blogs. Created by GitHub co-founder Tom Preston-Werner in 2008, Jekyll popularized the concept of static site generation and became the engine behind GitHub Pages — the free hosting service for static sites directly from GitHub repositories.

Jekyll’s philosophy is “simplicity over configuration.” It uses a convention-over-configuration approach: place Markdown files in a specific directory structure, add YAML front matter, and Jekyll builds a complete site with templates, navigation, and feeds. No database, no server-side processing — just static HTML files that can be served from any web server or CDN.

Core Features

Content Organization

Jekyll uses a straightforward directory structure:

• _posts/: Blog posts with filenames in YYYY-MM-DD-title.md format.
• _drafts/: Unpublished posts (not included in builds unless --drafts flag is used).
• _pages/: Static pages (optional, can also be in root with permalink in front matter).
• _data/: YAML, JSON, or CSV files for structured content — authors, products, navigation.
• _includes/: Reusable template partials.
• _layouts/: HTML templates that wrap content.
• _sass/: SCSS files for styling.
• _site/: Generated output (created by Jekyll).

Front Matter

Every content file begins with YAML front matter between triple-dashed lines:

---
layout: post
title: "My First Post"
date: 2024-01-15
categories: [blog, tutorial]
tags: [jekyll, github-pages]
---

Front matter controls layout, metadata, and custom variables accessible in templates via page.variable_name.

Liquid Templating

Jekyll uses Shopify’s Liquid templating language:

• Variables: {{ page.title }}, {{ site.title }}
• Tags: {% if %}, {% for %}, {% include %}, {% assign %}
• Filters: | date: "%Y-%m-%d", | slugify, | markdownify
• Includes: {% include header.html %}

Liquid is intentionally limited — no arbitrary Ruby code in templates, which keeps sites secure and portable.

Built-in Features

• Collections: Group related content beyond posts (e.g., portfolio items, documentation pages).
• Data Files: External YAML/JSON/CSV for structured content.
• Pagination: Automatic pagination for post lists.
• Drafts: Work-in-progress posts not published until ready.
• Scheduled Posts: Posts with future dates remain unpublished until that date.
• RSS/Atom Feeds: Auto-generated feed for posts.
• Sitemap: Auto-generated XML sitemap.

GitHub Pages Integration

Jekyll’s killer feature is seamless integration with GitHub Pages:

1. Push a Jekyll site to a GitHub repository.
2. GitHub automatically builds and deploys it to username.github.io.
3. Custom domains supported with CNAME file.
4. HTTPS automatically provisioned via Let’s Encrypt.
5. Build logs available in repository Actions tab.

Installation & Setup

Prerequisites

Jekyll requires Ruby (2.5.0 or higher) and RubyGems. Installation varies by platform:

Platform	Command	Notes
Windows	choco install ruby then gem install jekyll bundler	Use RubyInstaller for best experience
macOS	brew install ruby then gem install jekyll bundler	macOS ships with Ruby but often outdated
Linux	sudo apt install ruby-full build-essential zlib1g-dev then gem install jekyll bundler	Install development headers for native extensions

Create a New Site

jekyll new my-site
cd my-site
bundle install
bundle exec jekyll serve

This creates a basic site with default theme and starts a local server at http://localhost:4000.

Using Bundler

Jekyll sites should use Bundler to manage gem dependencies:

• Gemfile lists required gems (jekyll, theme, plugins)
• bundle install installs dependencies
• bundle exec jekyll serve runs Jekyll with the exact versions specified

Practical Workflows

Personal Blog with Minimal Mistakes Theme

1. Fork the Minimal Mistakes theme repository: https://github.com/mmistakes/minimal-mistakes
2. Clone locally and customize _config.yml.
3. Add posts to _posts/ with appropriate front matter.
4. Create pages in root with permalink in front matter.
5. Configure navigation in _data/navigation.yml.
6. Deploy to GitHub Pages by pushing to gh-pages branch.

Documentation Site

1. Create a collection in _config.yml:

   collections:
     docs:
       output: true
       permalink: /docs/:path/

2. Create _docs/ directory with Markdown files.
3. Create a layout at _layouts/docs.html with table of contents.
4. Add navigation that lists all docs sorted by weight.
5. Use {% include toc.html %} to generate table of contents from headings.

Portfolio Site with Projects Collection

1. Define projects collection:

   collections:
     projects:
       output: true

2. Add project files in _projects/ with front matter:

   ---
   title: "Project Name"
   image: /assets/images/project.jpg
   technologies: [React, Node.js]
   github: username/repo
   ---

3. Create a grid layout to display all projects.
4. Generate project pages with {{ project.title }} and {{ project.content }}.

Multilingual Site with i18n

1. Install jekyll-multiple-languages-plugin.
2. Configure languages in _config.yml:

   languages: ["en", "es", "fr"]
   default_lang: "en"

3. Create language folders: _i18n/en.yml, _i18n/es.yml.
4. Use {{ t.key }} in templates to output translated strings.
5. Create language switcher with links to /en/, /es/, /fr/ versions.

Community & Ecosystem

Theme Marketplace

Jekyll has 1,000+ themes available on:

• jekyllthemes.io: Curated premium and free themes
• jamstackthemes.dev: Jekyll and other static site generator themes
• GitHub: Search “jekyll-theme” for open-source options

Popular themes include:

• Minimal Mistakes: Flexible documentation/blog theme
• Hyde: Classic two-column theme
• Jekyll Now: Zero-configuration theme for beginners
• Beautiful Jekyll: Responsive theme with built-in analytics

Plugins

Jekyll’s plugin system extends functionality:

• jekyll-feed: RSS/Atom feed generation
• jekyll-seo-tag: SEO optimization meta tags
• jekyll-sitemap: XML sitemap generation
• jekyll-paginate: Pagination for post lists
• jekyll-compose: CLI for creating posts, drafts, pages

Note: GitHub Pages supports a limited set of plugins for security reasons. For full plugin support, build locally and push the _site/ directory.

Hosting Options

• GitHub Pages: Free, automatic builds, custom domains
• Netlify: Free tier, forms, serverless functions
• Vercel: Edge network, preview deployments
• Cloudflare Pages: Global CDN, unlimited bandwidth
• AWS S3 + CloudFront: Enterprise-scale static hosting

Comparison with Paid Alternatives

Feature	Jekyll	WordPress	Ghost	Medium
Cost	Free + hosting	Free + hosting	$9-$199/mo	Free (publishing)
Performance	Instant (static)	Slow (PHP+DB)	Good	Good
Security	Excellent (no server code)	Vulnerable (dynamic)	Good	Good
Customization	Unlimited (code)	Unlimited (plugins)	Limited	None
Learning Curve	Moderate	Easy	Easy	Very Easy
Hosting	Any static host	Requires PHP+MySQL	Managed or self-hosted	Platform only
Content Ownership	Full	Full	Full	Limited

Jekyll wins on simplicity, security, and performance — especially when paired with GitHub Pages for zero-cost hosting. WordPress wins on ease of use and plugin ecosystem. Ghost wins for newsletter-focused publishing. Medium wins for reach and built-in audience.

Who Should Use Jekyll?

Perfect For

• Developers who want a simple, Markdown-based blog
• Technical writers creating documentation sites
• Anyone using GitHub Pages for free hosting
• Projects where version-controlled content is important
• Sites that need to be fast, secure, and low-maintenance

Not Ideal For

• Non-technical users who cannot write Markdown or use the command line
• Sites requiring user-generated content (comments, forums)
• Complex e-commerce with shopping carts
• Real-time data or interactive applications
• Teams needing WYSIWYG editing

Verdict

Jekyll remains relevant because it does one thing exceptionally well: transform Markdown into fast, secure websites with minimal fuss. Its integration with GitHub Pages provides a complete publishing solution — write in Markdown, push to GitHub, and your site is live. While newer static site generators offer more features or faster builds, Jekyll’s simplicity and maturity make it the perfect starting point for developers entering the static site world.

Download: jekyllrb.com