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MGToolbox

Smart Crop

Tool100% In-Browser

Crop to any aspect ratio with the most detailed region kept automatically — edge-energy saliency, not a neural model.

Drag and drop your images here

Supports JPG, PNG, WebP, GIF (Max 50MB)

100% In-Browser • Files are processed 100% locally
Zero Data Collection
Files are processed 100% locally
Instant Client-Side Speed
Zero network upload delays
Free & Unlimited
No registration or credit card needed

Smart Crop — Detail-Aware Cropping for Any Aspect Ratio

Choose a target aspect ratio — square, 4:3, 16:9, or a custom value — and the tool finds the most detail-rich region of your photo using edge-energy saliency (the same class of method classic thumbnailers use), then crops there. A preview shows exactly what will be cut before you download.

It is a deterministic gradient-energy algorithm, not AI object recognition: it keeps the busiest, most textured region, which is usually the subject. Nothing is uploaded, and the crop runs in milliseconds.

Frequently Asked Questions

Everything you need to know about using Smart Crop safely and efficiently.

No. It scores image regions by edge/gradient energy — a fast, deterministic saliency method. For portraits, the busiest region is almost always the face area, but it does not "know" what it is cropping.
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