HackMD is a real-time, multi-platform collaborative Markdown editor. You can use HackMD to write notes with other people on your computer, tablet, or phone. HackMD provides a variety of document templates and allows users to push documents to GitHub. You can import and export documents from Dropbox, Google Drive, and GitHub gists.
HackMD supports CommonMark and other markup syntax, such as:
- MathJax for formulas
- Mermaid and Graphviz for UML diagrams
- Vega-lite for data visualizations
HackMD is the commercial version of CodiMD.
HackMD Markdown Support
HackMD 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 | Yes | |
| Subscript | Yes | |
| Superscript | Yes | |
| Automatic URL Linking | Yes | |
| Disabling Automatic URL Linking | Yes | |
| HTML | Yes |
Support for Additional Syntax Elements
As an added bonus, HackMD provides support for several obscure elements.
| Element | Markdown | Rendered Output |
|---|---|---|
| Abbreviation | *[HTML]: Hyper Text Markup LanguageThe HTML specification is maintained by the W3C. |
The HTML specification is maintained by the W3C. |