📘 The Complete Markdown Stress-Test File

A single Markdown file exercising (nearly) every part of the Markdown standard and common extensions.

📑 Table of Contents

1. Headings
2. Text Formatting
3. Links & Inline Code
4. Deeply Nested Lists
5. Blockquotes (Advanced)
6. Code Blocks
7. Complicated Tables
8. Task Lists
9. Horizontal Rules
10. Inline HTML
11. Footnotes

Headings

H1 Heading

H2 Heading

H3 Heading

H4 Heading

H5 Heading

H6 Heading

Text Formatting

Plain text looks like this.

Bold text
Italic text
Bold + Italic
Strikethrough
inline code

Mixed formatting:

You can combine bold, italic, inline code, and even strike text.

Escaping characters: *literal asterisk*
| literal pipe |
# not a heading

Links & Inline Code

• Markdown Guide
• GitHub

Inline code examples:

• Run git status before git commit
• Use printf("%s\n", value); in C
• The keyword async changes behavior

Deeply Nested Lists

1. Programming Languages
   • Compiled
     • C
     • Low-level
     • Manual memory
       • malloc
       • free
     • Rust
     • Ownership
     • Borrow checker
     1. Immutable borrow
     2. Mutable borrow
        • Rules
          • One mutable
          • Or many immutable
   • Interpreted
     • Python
     • Dynamic typing
     • Duck typing
       • "If it quacks"
     • JavaScript
     1. Browser
     2. Server
        • Node.js
        • Deno
2. Workflow
   • Write Markdown
   • Nest lists deeply
   • Question sanity
   • Finish document

Blockquotes (Advanced)

This is a simple quote.

Quote with Heading

You can include formatted text, emphasis, and inline code.

• Lists inside quotes
  • Item A
  • Item B
  1. Ordered inside unordered
  2. Still valid

Nested quote

Triple nested quote

Back to level two

Paragraph one inside quote.

Paragraph two inside quote, separated properly.

Code Blocks

def factorial(n: int) -> int:
    if n <= 1:
        return 1
    return n * factorial(n - 1)

print(factorial(5))

{
  "name": "Markdown",
  "type": "markup",
  "features": ["tables", "lists", "code"],
  "supported": true
}

Indented code block:

for i in range(3):
    print(i)

Complicated Tables

Ultra-Complicated Markdown Table (Stress Test)

| ```\````

Task Lists

• Headings
• Formatting
• Lists
• Quotes
• Code blocks
• Tables
• Publish
• Celebrate 🎉

Horizontal Rules

Inline HTML

Images & Video (Advanced Usage)

Inline Image

Inline image with title:

Reference-Style Images

Image with Link

Images Inside Tables (Difficult Case)

ID	Description	Preview	Notes
1	Simple image		Inline
2	Image + bold		Formatting
3	Escaped		Literal
4	HTML img	<img src="https://upload.wikimedia.org/wikipedia/commons/4/48/Markdown-mark.svg" width="40"/>	HTML

Video Usage in Markdown

Direct Video (Not Standard Markdown)

⚠️ Markdown does not officially support video embeds. Most platforms rely on HTML or link previews.

Video as a Link (Portable & Safe)

Watch the video

Video with Thumbnail Image

HTML Video Embed (Extension / Renderer-Dependent)

Iframe Embed (Common on GitHub, Obsidian, Not CommonMark)

Video Inside Table (Stress Case)

Summary Notes

• Images ✅ Standard Markdown
• Reference-style images ✅
• Images in tables ⚠️ fragile
• Video ❌ not standard
• HTML video/iframe ⚠️ renderer-dependent
• Link + thumbnail ✅ most portable

Footnotes

This document references a footnote here^[md].

You can reference it again later^[md].