How to Use Markdown Preview

Type or paste Markdown into the left panel. The right panel updates instantly with the rendered HTML output. Use the Copy HTML button to grab the raw HTML for use in your project.

Supported Markdown Syntax

• Headers: # H1, ## H2, ### H3 through H6

• Bold: **text** or ***bold italic***

• Italic: *text*

• Code: inline `code` or fenced ``` code blocks ```

• Links: [label](url)

• Lists: unordered - item and ordered 1. item

• Horizontal rule: ---

• Images: ![alt](url)

API Example

Convert Markdown to HTML programmatically with the REST API (requires API key, $5/mo):

## curl
curl -X POST https://apitoolkit.pro/api/v1/markdown \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"input":"# Hello\n\nThis is **bold**."}'

## JavaScript
const res = await fetch('https://apitoolkit.pro/api/v1/markdown', {
  method: 'POST',
  headers: { 'X-Api-Key': 'YOUR_API_KEY', 'Content-Type': 'application/json' },
  body: JSON.stringify({ input: '# Hello\n\nThis is **bold**.' })
});
const { result } = await res.json();
// result = "
Hello
This is bold.
"

Get API Key — $5/mo →

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