Markdown Support
Markdown Viewer supports the full GitHub-Flavored Markdown specification plus several extensions.
Standard Markdown
| Syntax | Support |
|---|---|
Headings (# to ######) | Auto-generated IDs for linking |
| Bold, italic, strikethrough | **bold**, *italic*, ~~strike~~ |
| Links | Internal .md links navigated in-app |
| Images | Clickable with lightbox overlay |
| Blockquotes | Standard rendering |
| Ordered/unordered lists | Including nested lists |
| Horizontal rules | ---, ***, ___ |
| Inline code | Backtick syntax |
GFM Extensions
| Feature | Syntax | Library |
|---|---|---|
| Tables | Pipe syntax | Built-in GFM |
| Task lists | - [x] / - [ ] | Built-in GFM |
| Strikethrough | ~~text~~ | Built-in GFM |
| Autolinks | URLs auto-linked | Built-in GFM |
Plugin Extensions
GitHub Alerts
markdown
> [!NOTE]
> Informational note
> [!TIP]
> Helpful tip
> [!IMPORTANT]
> Important information
> [!WARNING]
> Warning message
> [!CAUTION]
> Caution noticeFootnotes
markdown
Text with a footnote reference[^1].
[^1]: The footnote content appears at the bottom.Math (KaTeX)
Inline math: $E = mc^2$
Display math:
markdown
$$
\sum_{i=1}^{n} i = \frac{n(n+1)}{2}
$$Supports the full KaTeX function catalog.
Mermaid Diagrams
markdown
```mermaid
flowchart LR
A --> B --> C
```Supports all Mermaid diagram types: flowcharts, sequence diagrams, class diagrams, state diagrams, ER diagrams, Gantt charts, and more.
Diagrams include a fullscreen button. Syntax errors display the source code as fallback.
Syntax Highlighting
markdown
```python
def hello():
print("Hello, world!")
```Language detection is automatic when no language is specified. Supported languages include all highlight.js languages.
Extended Tables
Colspan via ||:
markdown
| Header 1 | Header 2 |
|---|---|
| This spans both columns ||Smart Typography
| Input | Output |
|---|---|
"quotes" | Curly double quotes |
'quotes' | Curly single quotes |
don't | Smart apostrophe |
--- | Em dash (—) |
-- | En dash (–) |
... | Ellipsis (…) |
Emoji Shortcodes
Use :name: syntax. Available shortcodes:
| Shortcode | Emoji | Shortcode | Emoji | |
|---|---|---|---|---|
:rocket: | 🚀 | :heart: | ❤️ | |
:fire: | 🔥 | :star: | ⭐ | |
:check: | ✅ | :x: | ❌ | |
:warning: | ⚠️ | :bulb: | 💡 | |
:tada: | 🎉 | :sparkles: | ✨ | |
:bug: | 🐛 | :gear: | ⚙️ | |
:lock: | 🔒 | :shield: | 🛡️ | |
:coffee: | ☕ | :zap: | ⚡ |
And 70+ more — see the full list in the source code.