This browser-based utility crops an area from a PNG picture. The way this editor works is pretty straightforward – you can select the cropping area by dragging the resizers that you see on your input PNG or fine-tune your selection by specifying precise cropping dimensions in the options. If the starting crop position is not provided, it will be automatically set to the top left corner. If the crop area size is unspecified, it will use PNG graphic file's width and height. The crop fragment can be a rectangle, a square, a circle, or an ellipse. You can switch between the rectangular and circular shape modes in the options. To switch between circle and ellipse, just adjust the eccentricity (radius) of the crop area using the resizers. The circle cropping mode is especially useful for creating round profile pictures or avatars for Twitter, Facebook, or Instagram. The recrop option allows you to fine-tune your cropping process. If recropping is enabled, then the original image you're cropping will be replaced with the cropped one. Png-abulous!