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Rimu Markup

Rimu is a readable-text to HTML markup language inspired by AsciiDoc and Markdown.


At its core Rimu is a simple readable-text markup similar in scope to Markdown, but with two additional areas of functionality (both built into the Rimu markup syntax):

  • Markup generation can be customized and extended.
  • Rimu includes a simple, flexible macro language.


  • A subset of Rimu syntax is Markdown compatible.
  • Rimu is fast (same speed as marked 0.3.2 compiling Rimu

Features summary

  • Single lightweight JavaScript file (less than 20KB minified) that can be dropped onto a Web page or used as a Node module.
  • No dependencies.
  • One-function API.
  • Features include raw HTML (a la Markdown), HTML attribute injection and parametrized macros.
  • Element syntax and behavior can be modified and extended.
  • Written in TypeScript.
  • Includes command-line compiler, JavaScript library, TypeScript library declaration file, playground GUI, Vim syntax highlighter and a unit test suite.
  • MIT license.

Learn more

Read the documentation and experiment with Rimu in the Rimu Playground or open the rimuplayground.html file locally in your browser.

See the Rimu Change Log for the latest changes.

Installing Rimu

Install Rimu as a Node.js module (includes the rimu library and the rimuc command-line tool):

    sudo npm install -g rimu

Building Rimu

To build Rimu and the Rimu documentation from source:

  1. Install the Git repository from Github.

     git clone
  2. Install gh-pages sub-repository:

     cd rimu
     git clone -b gh-pages gh-pages
  3. Install dependencies:

     npm install
  4. Build Rimu:

     jake build

Using the Rimu library

Browser compatibility

The generated HTML is compatible with all modern browsers. The Rimu JavaScript library works with the latest versions of IE, Firefox and Chrome, seems OK on Android and iOS. Does not run on IE8.