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.