Free Markdown to HTML API - Convert GFM

Parameters

name	in	type	required	description
`markdown`	body	string	required	Markdown
`allow_html`	body	boolean	optional	Off: HTML in the input is escaped. Links with javascript: and similar schemes are always dropped. default `false`

Request

Send your key in the X-API-Key header. More languages and patterns live on the code examples page.

curl -s -X POST "https://apixies.io/api/v1/markdown-to-html" \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"markdown":"# Hello World\n\nThis is **bold** and *italic* text."}'

const res = await fetch("https://apixies.io/api/v1/markdown-to-html", {
  method: "POST",
  headers: {
    "X-API-Key": "YOUR_API_KEY",
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
      "markdown": "# Hello World\n\nThis is **bold** and *italic* text."
  })
});
const data = await res.json();
console.log(data);

$ch = curl_init("https://apixies.io/api/v1/markdown-to-html");
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_HTTPHEADER => [
        "X-API-Key: YOUR_API_KEY",
        "Content-Type: application/json",
    ],
    CURLOPT_POSTFIELDS => '{"markdown":"# Hello World\\n\\nThis is **bold** and *italic* text."}',
]);
$data = json_decode(curl_exec($ch), true);
curl_close($ch);

print_r($data);

import requests

res = requests.request(
    "POST",
    "https://apixies.io/api/v1/markdown-to-html",
    json={
        "markdown": "# Hello World\n\nThis is **bold** and *italic* text."
    },
    headers={"X-API-Key": "YOUR_API_KEY"},
)
print(res.json())

Response

The result sits under data in the standard envelope. See the response format guide for errors and status codes.

returns

data.html: The rendered HTML.
data.markdown: The Markdown you sent, echoed back.

example response 200

{
    "status": "success",
    "http_code": 200,
    "code": "SUCCESS",
    "message": "Markdown converted to HTML",
    "data": {
        "markdown": "# Hello World\n\nThis is **bold** and *italic* text.",
        "html": "<h1>Hello World</h1>\n<p>This is <strong>bold</strong> and <em>italic</em> text.</p>",
        "allow_html": false,
        "converted_at": "2026-09-18T12:00:00+00:00"
    }
}

Authentication and limits

This endpoint needs an API key. Use the sandbox ("try it" above) to test it without registering. See the authentication guide for details.

Standard rate limits apply to this endpoint.

Common use cases

CMS content rendering

Convert Markdown content stored in your CMS or database to HTML for display. Support authors who prefer writing in Markdown.

Documentation generation

Build documentation sites by converting Markdown files to styled HTML. Combine with HTML to PDF for downloadable docs.

Email template building

Write email content in Markdown for simplicity, then convert to HTML for rich email rendering across email clients.

related endpoints

POST HTML to PDF Converter Convert HTML content to a PDF document with proper formatting and styling POST Text Analyzer Analyze text for word count, character count, reading time, and word frequency POST Base64 Encode/Decode Encode or decode Base64 strings

getting started

authentication code examples response format

explore

all api endpoints guides and tutorials online tools

resources

homepage changelog suggest an endpoint

Get a free API key

A temporary key takes one click and no signup. Register and you get 75 requests/day. Free tier is for development & small projects.

get a temporary key create an account