HTML to Image · Fast

Ultra-fast render — no JavaScript execution, ~50ms response time.

POST/v1/render/fast

ℹ️

This endpoint uses a lightweight render engine optimized for speed. It counts against the same monthly render limit as other endpoints.

Parameters

Name	Type	Default	Description
html *	String	—	HTML to render. Must be pure HTML/CSS — no JavaScript.
css	String	—	Extra CSS to inject globally.
width	Integer	1080	Output width in pixels.
height	Integer	1350	Output height in pixels.

Response

JSON

{
  "url": "https://api.starkrender.com/v1/image/uuid",
  "id":  "uuid"
}

Limitations

Because this endpoint uses a lightweight engine instead of a full browser, several features are unavailable:

No JavaScript execution
No automatic Google Fonts download — use system fonts or embed font-face via CSS
No selector, ms_delay, transparent, render_when_ready
No device_scale — output is always 1x
Complex CSS (animations, pseudo-elements, some flexbox edge cases) may not render identically to Chromium

Use POST /v1/render when you need JavaScript execution, Google Fonts, or pixel-perfect fidelity.

Examples

Simple card — ~50ms

cURL

curl -X POST https://api.starkrender.com/v1/render/fast \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "html":   "<div style=\"background:#0f172a;color:#fff;padding:40px;font-size:32px\">Hello</div>",
    "width":  800,
    "height": 400
  }'

With extra CSS

JSON Body

{
  "html": "<div class='box'>Fast render</div>",
  "css":  ".box { background: #C9952A; color: #000; padding: 60px; font-weight: 900; font-size: 48px; }",
  "width":  1080,
  "height": 1080
}