A comprehensive test of GitHub‑flavored Markdown features using placeholder text and common formatting patterns.

1. Headings🔗

H1 Heading🔗

H2 Heading🔗

H3 Heading🔗

H4 Heading🔗

H5 Heading🔗

H6 Heading🔗

2. Paragraphs & Line Breaks🔗

Lorem ipsum dolor sit amet, consectetur adipiscing elit. This line uses a forced line break (two spaces at end).

Another paragraph without forced breaks.

3. Emphasis🔗

• Italic text
• Bold text
• Bold italic text
• Strikethrough
• Bold with italic inside

4. Blockquotes🔗

This is a blockquote. It can span multiple lines.

Nested blockquote.

5. Lists🔗

Unordered🔗

• Item A
  • Subitem A1
    • Subitem A1a
• Item B

Ordered🔗

1. First
2. Second
   1. Second‑A
   2. Second‑B
3. Third

Task Lists🔗

• Completed task
• Incomplete task
• Another task

6. Code🔗

Inline Code🔗

Use npm install to install packages.

Code Blocks🔗

function greet(name) {
  console.log(`Hello, ${name}!`);
}
greet("Markdown Tester");

# Bash example
echo "Hello world"

7. Tables🔗

8. Links🔗

• Inline link: https://example.com
• Markdown link: Example
• Reference link: GitHub

9. Images🔗

(Replace with your own image paths if needed)

10. Horizontal Rules🔗

11. Fenced Block With Language Highlighting🔗

{
  "name": "example",
  "version": "1.0.0",
  "private": true
}

12. HTML Support (GFM allows some)🔗

13. Footnotes🔗

Here is a sentence with a footnote.¹

14. Emoji (GFM supports emoji shortcodes)🔗

🚀 🎉 ⚠️

15. Collapsible Sections (GitHub-specific)🔗

16. GitHub -style alerts🔗

This is note: Neutral, informational, non‑urgent.

This is tip: Universally understood as an idea or helpful hint.

This is important: Draws attention without implying danger.

Standard warning symbol, highly recognizable.

Indicates risk or need for care, but less severe than danger.