Image Cropper
Drag to select your crop area, use aspect ratio presets, or enter exact dimensions. Free, instant, private.
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Aspect Ratios and Cropping Explained
An aspect ratio describes the proportional relationship between an image width and height. Common ratios: 1:1 is a square (Instagram posts), 16:9 is widescreen (YouTube, most monitors), 4:3 is traditional screen format (older photos), 3:2 is the ratio of most DSLR cameras, 9:16 is vertical video (Instagram Reels, TikTok). Cropping to a specific ratio is essential when the platform enforces one. Instagram profile pictures must be 1:1. YouTube thumbnails must be 16:9. The rule of thirds suggests placing the main subject one-third from an edge rather than dead center. When cropping portraits, keep eyes on the upper third line. When cropping landscapes, place the horizon on either the upper or lower third line for visual balance.