As a new lossy image file format developed by Google specifically designed to accelerate the Web, under the condition of maintaining the same image quality, WebP format can be much smaller than JPG/JPEG format (reduce 40% or more) in size. But the problem is - WebP is not so popular that could be seen everywhere at present. As a consequence, we may have such needs for now - to convert the WebP format of images to one of the most common formats such as JPG, PNG, or vice versa.
WebP is a new modern image format that supports both lossy and lossless compression launched by Google for Web use. In the same quality, it has much smaller file size than JPEG and PNG formats of images. If all goes well, WebP could soon become the new standard of Web images.