画像トリミング

An image cropper that lets you drag a selection over your photo and export just that region at full resolution, keeping the original pixels with no quality loss.

Cropping is one of the most common edits: trimming an avatar to a square, cutting distracting edges out of a screenshot, focusing on the subject, or removing a border. Drag a rectangle over the part you want to keep and discard the rest.

Because the crop runs on your device, your image never leaves it, and nothing is uploaded to a server.

Cropping happens entirely in your browser with the Canvas API, so it is instant. Your original file is never modified; you download a new image containing only the cropped region, and the parts outside your selection are simply not included in the output.

The crop is lossless in the sense that the pixels inside your selection are kept exactly as they were. Nothing is scaled or re-compressed beyond saving the file, so the kept region looks identical to the original.

JPEG photos are saved as JPG, and other formats are saved as PNG, so transparency is preserved where the original had it, which matters for logos and graphics with see-through areas.