How Circle crop image works
Image Circle Crop cuts your photo into a perfect circle with a transparent background and exports the result as a PNG. The circle is always the largest one that fits centered in your image; you choose whether the corners outside it stay transparent or get filled with white or black, then download the clipped output. The entire operation runs in Canvas inside your browser; the image bytes stay on your device from start to finish.
Circle-cropped images are widely used for profile pictures, avatars and team-member portraits on websites and applications. PNG is the correct output format here because it supports the alpha channel needed for the transparent corners outside the circle. The exported file drops straight into design tools, CMS media libraries or social profile upload forms.