Complete Markdown Syntax Reference (English Version)

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1. Headings

Heading 1

Heading 2

Heading 3

Heading 4

Heading 5

Heading 6

Alternative syntax:

Heading 1

Heading 2

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2. Paragraphs & Line Breaks

This is a paragraph.

This is another paragraph (separated by an empty line).

Line break (end with two spaces)
Next line

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3. Emphasis

Bold
Bold

Italic
Italic

Bold + Italic
Bold + Italic

Strikethrough

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4. Blockquotes

This is a blockquote

Nested blockquote

Multi-level nested blockquote

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5. Lists

Unordered List

• Item

• Item

• Item
  • Sub-item
    • Sub-sub-item

Ordered List

1. First item
2. Second item
3. Third item
   1. Sub-item
   2. Sub-item

Task List (GFM)

• Incomplete
• Completed

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6. Code

Inline code

This is inline code

Code block

css
复制
Plain code block

Fenced code block with language

python
复制
def hello():
    print("Hello Markdown")

c
复制
printf("Hello, World!");

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7. Horizontal Rules

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8. Links

Inline link

OpenAI

Link with title

OpenAI

Reference-style link

OpenAI

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9. Images

Inline image

Example Image

Image with title

Markdown Logo

Reference-style image

Logo

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10. Tables (GFM)

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11. Escape Characters

* _ # + - . ! | ` \

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12. HTML Support

Bold
Italic

Line break
^Superscript
_Subscript

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13. Footnotes (Some platforms)

This is a footnote example¹

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14. Autolinks

https://openai.com
email@example.com

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15. Definition Lists (Some extensions)

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16. Collapsible Content (GitHub / Notion)

Click to expand

Hidden content

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17. Math Formulas (Platform-dependent)

Inline formula

$E = mc^2$

Block formula

$$\int_a^b f(x)\,dx$$

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18. Emoji (Platform-dependent)

😄 🚀 🔥

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19. Comments (Invisible)

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20. Anchors / Jump Links (Platform-dependent)

Jump to heading

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21. Extended Syntax Examples

Emoji

😄 ❤️ ⭐

Mermaid Flowchart (Obsidian / GitHub supported)

Loading Diagram...

PlantUML (Some platforms)

Footnote with emoji

This is a footnote²

Footnotes

1. Footnote content ↩

2. Footnote content, can include links or emoji 🌟 ↩