The chosen radius clips all four corners on the output canvas. The radius is capped internally at half the image's shorter side, so extreme values cannot curve past the center. Width and height remain unchanged.

Transparency depends on format

PNG and WebP can represent transparent corner pixels. JPG cannot: its format has no alpha channel, so it is a poor choice when the rounded image must sit cleanly over different background colors. Convert a JPG to PNG first when transparent corners are required.

Choose a radius visually

A modest value softens a card or profile image; a radius near half the shorter dimension can create a pill or circle-like crop only when the source proportions support it. The tool does not crop a rectangular photo into a true centered square.

Workflow and alternatives

Upload, adjust the radius, create the preview, and inspect every corner before download. Processing stays in the browser. Use Image Cropper first if the subject needs reframing, or Image Border if you need visible padding rather than removed corners.