Free and light weight online image cropper tool makes a difference you to edit picture without transfer on server.
Shiftkey when you resize the crop box.
Shiftkey when you crop on the image.
The size of the cropper inherits from the size of the image's parent element (wrapper), so be sure to wrap the image with a visible block element.
The outputted cropped data is based on the original image size, so you can use them to crop the image directly.
If you try to start cropper on a cross-origin image, please make sure that your browser supports HTML5 CORS settings attributes, and your image server supports the
Access-Control-Allow-Origin option (see the HTTP access control (CORS)).