OG Image Generator
Generate Open Graph and social media preview images via html2png.dev.
Standard Sizes
| Platform | Size | Aspect Ratio |
|---|---|---|
| Facebook/LinkedIn | 1200×630 | 1.91:1 |
| Twitter/X | 1200×675 | 1.78:1 (16:9) |
| Twitter Large | 1200×600 | 2:1 |
| Square | 1200×1200 | 1:1 |
Endpoint
POST https://html2png.dev/api/convert
Example
curl -X POST "https://html2png.dev/api/convert?width=1200&height=630&deviceScaleFactor=2" \
-H "Content-Type: text/html" \
-d '<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.tailwindcss.com"></script>
<link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&display=swap" rel="stylesheet">
</head>
<body class="flex items-center justify-center" style="width: 1200px; height: 630px; font-family: Inter, sans-serif; background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);">
<div class="text-center text-white px-16">
<h1 class="text-7xl font-extrabold mb-6 leading-tight">How to Build APIs</h1>
<p class="text-3xl opacity-90 mb-8">A complete guide to RESTful design</p>
<div class="flex items-center justify-center gap-4">
<div class="w-16 h-16 rounded-full bg-white/20"></div>
<span class="text-xl">By John Doe · 10 min read</span>
</div>
</div>
</body>
</html>'
Key Elements
Typography:
- Large, bold headline (60-80px)
- Readable subheadline (24-32px)
- High contrast against background
Layout:
- Centered or left-aligned content
- Generous padding (60-100px)
- Clear visual hierarchy
Backgrounds:
- Gradient overlays
- Subtle patterns
- Brand colors
Images:
- Author avatars (circular, 80-120px)
- Logos (top corner or centered)
- Decorative elements (subtle)
CDN Resources
Fonts:
<link
href="https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&display=swap"
rel="stylesheet"
/>
Icons:
<script src="https://unpkg.com/lucide@latest"></script>
Tips
- Always use
deviceScaleFactor=2for crisp text - Use
delay=1000for font loading - Keep text minimal (3-5 words headline max)
- Test at small sizes (images get compressed in feeds)
- Use high contrast for readability
Rate Limits
50 requests/hour per IP.