How to crop to 3:4
- Choose an image.
- Position and zoom it inside the portrait frame.
- Select a 3:4 pixel size or keep the crop resolution.
- Choose a format and download.
3:4 Image Cropper
Frame an image in a locked 3:4 portrait shape, then choose a resolution that keeps those proportions.
Your image stays on your device. Processing happens entirely in your browser and the image is never uploaded.
Aspect ratio and pixel dimensions
3:4 describes a shape where height is four-thirds of width. Pixel dimensions describe resolution. For example, 900 × 1200 and 1500 × 2000 are both 3:4, but the second contains more pixels.
Frequently Asked Questions
Yes.
Cropping removes pixels outside the selection; choosing a preset may also scale the result.
Yes, drag and zoom before export.
No.
JPG uses lossy compression to create small files and works best for photographs, but it does not support transparency. PNG uses lossless compression, preserves sharp details and transparency, and is best for graphics, logos, and screenshots, though files are often larger. WebP can produce smaller files than JPG or PNG, supports transparency, and is a strong choice for modern websites. Choose JPG for photos and broad compatibility, PNG when exact detail or transparency matters, and WebP when reducing web page file size is the priority.