CodiMD is an open-source real-time collaborative Markdown editor. You can easily deploy CodiMD with Docker following this tutorial. CodiMD supports CommonMark and other markup syntax, such as:

  • MathJax for formulas
  • Mermaid and Graphviz for UML diagrams
  • Vega-lite for data visualizations

CodiMD is the open-source version of HackMD.

CodiMD Markdown Support

CodiMD provides support for the following Markdown elements.

Element Support Notes
Headings Yes
Paragraphs Yes
Line Breaks Yes
Bold Yes
Italic Yes
Blockquotes Yes
Ordered Lists Yes
Unordered Lists Yes
Code Yes
Horizontal Rules Yes
Links Yes
Images Yes
Tables Yes
Fenced Code Blocks Yes
Syntax Highlighting Yes
Footnotes Yes
Heading IDs No
Definition Lists Yes
Strikethrough Yes
Task Lists Yes
Emoji (copy and paste) Yes
Emoji (shortcodes) Yes
Highlight No
Subscript No
Superscript No
Automatic URL Linking Yes
Disabling Automatic URL Linking No

See Also