Why should you use Eleventy instead of other static site generators?

Eleventy (11ty.dev) is a static site generator that turns templates and data into plain HTML files. Choose it if you want a lightweight build tool that does not lock you into one template language, and if you care about build speed and simple output. It is less suited if you want a batteries-included framework with a built-in CMS, client-side routing, or a large opinionated plugin ecosystem out of the box.

What Eleventy actually is

Eleventy is described on its own site as "a simpler static site generator." It takes your content and templates, runs them through a build step, and writes static files to an output folder. There is no required runtime on the server side — the result is static HTML, CSS, and assets you can host almost anywhere.

The site lists a "Why Eleventy?" section alongside Get Started, Performance, and Learn, which signals that the project positions simplicity and performance as core reasons to pick it.

The main reasons to choose it

It does not force a single template language

This is the clearest differentiator. Eleventy supports many template languages, and the docs list them explicitly:

• HTML
• Markdown
• MDX
• JavaScript, JSX, TypeScript
• WebC
• Nunjucks, Liquid, Handlebars, Mustache, EJS
• HAML, Pug
• Sass

You can mix languages in one project — for example, Markdown for blog posts and Nunjucks for layouts. Other generators often commit you to one templating system, which becomes a migration cost if your team already knows a different one.

Simpler mental model

The build pipeline is content plus templates plus data, producing static files. The documentation is organized around concrete tasks — Command Line Usage, Add a Configuration File, Copy Files to Output, Permalinks, Layouts, Collections, Pagination — rather than a large framework abstraction. If you have used a static site generator before, the concepts transfer quickly.

Performance-oriented

The site maintains a Performance section and a "Built With Eleventy" showcase. Static output means no server-side rendering per request, which is the baseline performance advantage of any static generator; Eleventy's own emphasis is on keeping the generator itself light and the build fast.

Data handling is a first-class feature

Eleventy has a documented data cascade: front matter data, template and directory data files, global data files, and computed data. It also supports JavaScript data files and custom data file formats, plus a validateData-style configuration area. If your site pulls from local files, APIs, or generated data, this is where Eleventy is stronger than minimal generators.

Extensibility without a heavy core

Plugins are opt-in. The docs list official plugins (Image, Fetch, Render, Internationalization, Upgrade Helper, RSS, Syntax Highlighting, InputPath to URL, Navigation, HTML Bundle, Id Attribute) and a separate community plugins section. You add what you need instead of inheriting a large default stack.

Where it is a weaker fit

• No built-in CMS. The docs point to "Using a CMS" as a separate concern. If you need an editing UI for non-technical authors, you bring your own (headless CMS, Git-based editor, etc.).
• No client-side app framework. Eleventy outputs static files. If you need a single-page application with routing and hydration, that is a different tool category.
• You assemble more yourself. Compared with all-in-one frameworks, you will make more decisions about structure, asset pipeline, and deployment.

Requirements and how to start

Eleventy requires a way to run JavaScript. The site recommends Node.js version 18 or newer.

1. Check your Node version in a terminal:

   node --version
   

   If Node is missing or reports a version below 18, install Node.js first.
2. Create a Markdown file, for example index.md. The docs show terminal commands for macOS/Linux, Windows, and cross-platform:

   echo '# Heading' > index.md
   

   On Windows PowerShell:

   echo '# Heading' | out-file -encoding utf8 'index.md'
   

3. Run the build (see the Quick Start and Command Line Usage docs for the exact command for your setup). The expected result is an output folder containing generated HTML.

There is also a "Try Eleventy in Your Browser" option on the site if you want to test it before installing anything locally.

Version context

The site currently lists Stable 3.1.6 and Canary 4.0.0-alpha.10. If you are starting a new project, the stable line is the safer default; the canary line is for testing upcoming changes. An Upgrade Helper plugin exists for moving between versions.

A practical way to decide

If your project is content-driven — a blog, documentation site, marketing pages, or a data-backed static site — and you want to keep the toolchain small and the template choice open, Eleventy is a reasonable default. If you need an editing interface or an interactive application, plan for an additional layer or pick a different tool.