Last updated: June 08, 2026 · Updated quarterly to reflect current pricing and features.

Tutorial · HTML-to-Image API

Rendex API Tutorial (2026): Setup, Examples, and a Simpler Alternative

June 08, 2026 5 min read HTML-to-Image API

This tutorial covers how to get started with the Rendex API — authentication, key parameters, and code examples. We also show why developers often end up choosing a simpler alternative.

Getting started with the Rendex API

Rendex (Enterprise edge rendering on Cloudflare infrastructure) provides a REST API for html rendering + edge. Here's how to set it up and make your first API call.

Authentication

Most Rendex API requests require authentication via API key. You'll find your key in the Rendex dashboard after signing up.

Making your first request

# Rendex — example request curl -X POST https://api.rendex.com/v1/render \ -H "Authorization: Bearer YOUR_RENDEX_KEY" \ -H "Content-Type: application/json" \ -d '{"url": "https://example.com", "width": 1200, "height": 630}'

Key parameters

width / height — output image dimensions
format — PNG, JPEG, or WebP
html — HTML string to render

Limitations to be aware of

No native n8n or Make.com node.

A simpler alternative for HTML rendering

If you're using Rendex specifically for HTML-to-image rendering and find the setup complex, RenderPix offers a simpler API with native n8n support:

# One API call. That's all. curl -X POST https://renderpix.dev/v1/render \ -H "X-API-Key: YOUR_KEY" \ -H "Content-Type: application/json" \ -d '{ "html": "<div style=\"width:1200px;height:630px;background:#0f0f0f;color:#fff;display:flex;align-items:center;justify-content:center;font-size:48px\">Hello, RenderPix</div>", "width": 1200, "height": 630, "format": "png" }' --output card.png

Feature	Rendex	RenderPix
Starting price	$19/mo	$9/mo
Free tier	limited	100 renders/mo
Raw HTML input	✓	✓ Full HTML/CSS
n8n native node	✗	✓ Native node
Batch rendering	✓	✓ Built-in
Template variables	✗	✓ {key} syntax
Async callback	✗	✓
PNG / JPEG / WebP	✓	✓
Primary use case	HTML rendering + edge	HTML image generation