Markdown to HTML

Markdown to HTML is an API that converts Markdown text (GitHub's, Notion's, Obsidian's...) into plain HTML, tables and strikethrough included (GFM). Useful for showing Markdown-written content inside a website, an email, or anywhere that only understands HTML.

How it works

You send the Markdown text (raw or inside a JSON body) and get back the equivalent HTML. It doesn't clean the result: if your Markdown has hand-written HTML mixed in, it comes out as-is, same as any Markdown converter.

If you're going to show that HTML to people you don't control (user comments, say), sanitizing it is on you: this tool doesn't do it for you.

All you need

Your API key. Create it in your dashboard with "+ Create key". It's shown only once, so copy and save it.
In your automation platform, an "HTTP Request" step (n8n, Make, Zapier, Pipedream… all have one).

How to use it in n8n (step by step)

In the HTTP Request node:

Method: POST
URL: https://api.cofferdock.com/markdown-to-html
Send Headers: on → add two: x-api-key = your key, and Content-Type = application/json
Send Body: on → Body Content Type: JSON → { "markdown": "# Hello\n\nThis is **Markdown**." }

In Make (HTTP → Make a request module): same method and URL, Body type: Raw, Content type: JSON, with the same body.

Options (inside the JSON)

Option	Default	What it does
`markdown`	-	Required. The Markdown text to convert.
`output`	`json`	`html` to get the raw HTML back instead of JSON.

API overview

Endpoint: POST https://api.cofferdock.com/markdown-to-html
Auth: header x-api-key: YOUR_KEY.
Input: JSON { "markdown": "..." }, or raw Markdown with Content-Type: text/plain.
Engine: marked, CommonMark + GFM (tables, strikethrough, task lists).
Limits: 30 requests/min per IP. Up to 2MB of text. 1 call = 1 credit.

Examples

curl:

curl -X POST "https://api.cofferdock.com/markdown-to-html" \
  -H "x-api-key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"markdown":"# Hello\n\nThis is **Markdown**."}'

JavaScript (Node 18+):

const r = await fetch('https://api.cofferdock.com/markdown-to-html', {
  method: 'POST',
  headers: { 'x-api-key': 'YOUR_KEY', 'Content-Type': 'application/json' },
  body: JSON.stringify({ markdown: '# Hello\n\nThis is **Markdown**.' }),
});
const { html } = await r.json();

Response

{ "success": true, "html": "<h1>Hello</h1>\n<p>This is <strong>Markdown</strong>.</p>",
    "meta": { "used": 12, "remaining": 488 } }

What you get back

html, the converted result. With output=html, the raw HTML as the response body (Content-Type: text/html), no JSON wrapper.