11ty/eleventy

Eleventy is a static site generator, a tool that takes a folder of template files and converts them into plain HTML pages ready to be served on the web. A static site generator solves the problem of building websites that don't need a live database or server to produce each page on demand: instead, you generate all the HTML once, then host those files anywhere cheaply and quickly. What sets Eleventy apart is its flexibility and simplicity. It can process templates written in many different formats at once, plain HTML, Markdown (the simple text formatting language bloggers often use), JavaScript, Liquid, Nunjucks, and more. Plugins extend that further to cover WebC, Sass (a CSS extension), Vue, Svelte, TypeScript, and JSX. You are not locked into one templating language across your project. Eleventy itself is written in JavaScript and installed via npm (the standard Node.js package manager), but the sites it produces can be hosted as simple static files with no Node.js required at runtime. Someone would choose Eleventy for a personal blog, a documentation site, a marketing landing page, or any content-heavy website where speed and simplicity matter more than dynamic, database-driven features. It is considered an alternative to Jekyll (a similar tool in the Ruby ecosystem) and appeals to developers who want full control without the complexity of larger frameworks.