SmartImgKit API
Free image processing API for developers. No API key required. All processing runs in the user's browser, which means zero server costs for you and complete privacy for your users.
1. URL Parameter API (Instant)
Load any tool with a pre-filled image URL. Perfect for integrations where you want to send users directly to a tool with their image already loaded.
https://smartimgkit.com/tools/compressor?url=https://example.com/photo.jpg https://smartimgkit.com/tools/resizer?url=https://example.com/photo.jpg&w=800 https://smartimgkit.com/tools/converter?url=https://example.com/photo.jpg&to=webp
Parameters:
url— Image URL to auto-load (CORS-permitted images work best)w,h— Target dimensions (resizer only)to— Target format: webp, jpeg, png (converter only)
2. Image Info API
Get image metadata (dimensions, format, file size) as JSON.
GET/api/info?url=IMAGE_URL
curl "https://smartimgkit.com/api/info?url=https://example.com/photo.jpg"
{
"width": 1920,
"height": 1080,
"type": "image/jpeg",
"size": 2458392,
"ok": true
}
3. JavaScript SDK (Browser)
Embed image processing directly in your web app using our open-source browser-based approach. No server needed.
<script src="https://smartimgkit.com/js/imkit-sdk.js"></script>
<script>
// Compress an image file to WebP
const blob = await IMKit.compress(file, { format: 'webp', quality: 0.8 });
// blob is the compressed image — send it anywhere
</script>
The SDK is a thin wrapper around Canvas API and WebCodecs. Your users' images never touch our servers.
Pricing & Rate Limits
- Free forever — no API key, no signup, no credit card
- No rate limits — because processing happens client-side
- No file size limit — same as the main tools
We believe image processing should be free and private. If you need higher-volume server-side processing, consider self-hosting our open-source engine.
What's Not Included
We don't offer server-side AI processing (background removal, super-resolution) via API yet. Those require GPU infrastructure and will be a paid tier. For now, use the browser tools directly.