A Comprehensive List of All Markdown (md) Syntax

[smfadmin (OP)]

Here's a comprehensive breakdown

of Markdown syntax, organized by category.

For the GitHub standards visit https://markdown-it.github.io/

1. Headers

# H1
## H2
### H3
#### H4
##### H5
###### H6

Alternative syntax (H1/H2 only):

H1 Header
=========

H2 Header
---------

2. Text Formatting

Syntax	Result
*italic* or _italic_	italic
**bold** or __bold__	bold
***bold italic***	bold italic
~~strikethrough~~	strikethrough
`inline code`	inline code

3. Lists

Unordered:

- Item 1
- Item 2
  - Nested item
* Item (asterisk also works)
+ Item (plus also works)

Ordered:

1. First item
2. Second item
   1. Nested item
3. Third item

Task lists (GFM extension):

- [x] Completed task
- [ ] Incomplete task

4. Links

[Link text](https://example.com)
[Link with title](https://example.com "Title text")
<https://example.com>              (auto-link)
[Reference link][1]

[1]: https://example.com          (reference definition)

5. Images

![Alt text](image.jpg)
![Alt text](image.jpg "Optional title")

6. Code Blocks

Fenced code block (recommended):

```python
def hello():
    print("Hello, world!")
```

Indented code block (4 spaces):

    def hello():
        print("Hello, world!")

7. Blockquotes

> This is a blockquote
>> Nested blockquote
> Multiple lines
> in same quote

8. Horizontal Rules

---
***
___

(All three produce identical horizontal lines)

9. Tables (GFM extension)

| Header 1 | Header 2 | Header 3 |
|----------|:--------:|---------:|
| Left     | Center   | Right    |
| aligned  | aligned  | aligned  |

Alignment markers:

• :--- = left align
• :---: = center align
• ---: = right align

10. Escaping Characters

\* Not italic \*
\# Not a header
\[Not a link\]

Use backslash before: \ ` * _ { } [ ] ( ) # + - . !

11. Line Breaks

End line with two spaces  
for a line break (no new paragraph)

Blank line

for a new paragraph

12. Footnotes (Extension, not universally supported)

Here's a sentence with a footnote.[^1]

[^1]: This is the footnote content.

13. Definition Lists (Extension)

Term
: Definition 1
: Definition 2

14. GitHub-Specific Extensions

Mentions:

@username

Issue/PR references:

#123

Emoji:

:smile: :heart: :thumbsup:

Syntax highlighting (language-specific):

```javascript
```
```bash
```
```json
```

15. HTML Embedding

Most Markdown flavors allow raw HTML:

  Centered content



          (manual line break)
<sub>subscript</sub>
<sup>superscript</sup>

Quick Reference Table

Element	Syntax
Header	# H1
Bold	**text**
Italic	*text*
Strikethrough	~~text~~
Link	[text](url)
Image	
Code	`code`
Code block	``lang `
Blockquote	> text
List (unordered)	- item
List (ordered)	1. item
Horizontal rule	---
Table	| col |
Task list	`- [

[...truncated: increase max_tokens...]