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Moxygen is a Doxygen XML to Markdown converter for C++ developers who want a minimal and beautiful solution for documentating their projects.

Moxygen is currently used in conjunction with GitBook to generate the API documentation for LibSourcey.


  • Multi page output: Output single or multiple files
  • Internal linking: Anchors in comments and function definitions are supported
  • Markdown comments: Markdown in Doxygen comments are rendered
  • Doxygen groups: Doxygen grouping is supported for more organised documentation
  • Custom templates: Modify the core Markdown templates to add your own flavour
  • Optional index: Optionally render a top level index


  1. Add GENERATE_XML=YES to your Doxyfile first.
  2. Run doxygen to generate the XML documentation.
  3. Install moxygen like so: npm install moxygen -g.
  4. Run moxygen providing the folder location of the XML documentation as the first argument ie. {OUTPUT_DIRECTORY}/xml.
Usage: moxygen [options] <doxygen XML directory>


  -V, --version          output the version number
  -o, --output <file>    output file, must contain "%s" when using `groups` or `classes`
  -g, --groups           output doxygen groups into separate files
  -c, --classes          output doxygen classes into separate files
  -p, --pages            output doxygen pages into separate files
  -n, --noindex          disable generation of the index, ignored with `groups` or `classes`
  -a, --anchors          add anchors to internal links
  -H, --html-anchors     add html anchors to internal links
  -l, --language <lang>  programming language
  -t, --templates <dir>  custom templates directory
  -L, --logfile [file]   output log messages to file
  -q, --quiet            quiet mode
  -h, --help             output usage information

Multi-page Output

Moxygen supports the doxygen groups syntax for generating multi page documentation. Every \defgroup in your source code will be parsed and output into a separate markdown file, with internal reference updated accordingly.


moxygen --anchors --groups --output /path/to/doxygen/xml


To get a feel for how Moxygen works you can play with the example which is located in the example folder. The example contains:

  • Documented C++ example code
  • A Doxyfile file (for doxygen 1.8.13)
  • Pre-generated XML output in example/xml
  • Pre-generated output Markdown files in example/doc

To fully build the example, follow these steps (once you've installed doxygen. See Development & Contribution, below):

  1. Rebuild the XML: run doxygen from within the example folder.
  2. Rebuild the Moxygen output: from within this directory,
node bin/moxygen.js --groups --pages --anchors --output=example/doc/ example/xml

Development & Contribution

You can develop this project as you would any other Node project:

  1. Clone this repo.
  2. npm install from this directory.

This project is tested through integration, by building the example/. To quickly test this project:

  1. Install doxygen (brew install doxygen, choco install doxygen, for example). Only must be done once per computer.
  2. npm test from this directory. This will run Doxygen on the example/ and build the output.