Crop Image renders your photo directly in the page and overlays a draggable, resizable selection box, so you can see exactly what will be kept before committing — no round trip to a server, no upload. Dragging the box moves the selection; the four corner handles resize it.

Choosing a fixed aspect ratio (square, 4:3, 16:9, or 3:2) keeps the selection box locked to that proportion as you resize it, which is useful when you need a crop that fits a specific placement — a profile picture, a video thumbnail, or a print size — without doing the math yourself. "Free" leaves the selection fully unconstrained.

When you crop, only the selected pixel region is redrawn to a new canvas and re-encoded in your image's original format — everything outside the selection is discarded, and the result downloads immediately with no server involved at any point.

Fixed aspect ratios exist because a lot of common crop targets have a known, specific shape — social profile pictures are typically square (1:1), most video thumbnails and widescreen displays are 16:9, standard photo prints are usually 4:3 or 3:2 — and manually dragging a freeform selection to hit an exact ratio by eye is genuinely difficult. Locking the selection box to a ratio means every resize handle maintains that proportion automatically, so you can focus on framing (what's in the shot) instead of arithmetic (getting the dimensions exactly right).

Cropping is intentionally scoped to one image at a time rather than batch mode, because crop placement is inherently a visual judgment call specific to each photo's composition — there's no sensible "apply this exact same crop to 20 different images" default the way there is for a batch resize or format conversion. If you do need to process many images the same way, Resize Image and Image Converter both support batches, since their operations don't depend on each image's individual framing.