Crop Image
Crop images with precision. Lock aspect ratios or crop freely. Export as lossless PNG —100% in your browser.
Drop your image here
or click to browse
How it works
Three simple steps —everything happens in your browser.
Upload your image
Drag and drop or click to select any image. Supports JPG, PNG, WebP, BMP, and GIF formats.
Select crop area
Choose a preset aspect ratio (1:1, 4:3, 16:9, etc.) or use free crop. Drag and resize the selection.
Download PNG
Click crop and instantly download your cropped image as a lossless PNG file. Zero quality loss.
Why use ToolKnit Image Cropper?
100% Private —No Uploads
Your images never leave your device. All cropping uses the HTML5 Canvas API locally in your browser —nothing is sent to any server.
Precise Aspect Ratio Locking
Lock to standard ratios like 1:1 (square), 4:3 (photo), 16:9 (widescreen), 3:2 (DSLR) —perfect for social media and print.
Lossless PNG Output
Cropped images are exported as PNG —lossless compression preserves every pixel of your crop with zero quality degradation.
Canvas-Constrained Cropping
The crop selection can never exceed image boundaries. Move and resize with confidence —the result is always within bounds.
Pro Tips
- ● Use 1:1 ratio for Instagram profile pictures and square posts.
- ● 16:9 is perfect for YouTube thumbnails, presentations, and desktop wallpapers.
- ● Use 9:16 for Instagram Stories, TikTok, and mobile wallpapers.
- ● The crop area shows real pixel dimensions so you know exactly what size your output will be.
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