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.
JPEG Imager is a convenient and easy-to-use, lightweight but practical JPEG, PNG and GIF images batch compression and optimization tool, supports real-time preview and contrast of effects, and allows to customize the compression ratio as need.
Undoubtedly, PNG is the most popular image format in the present network environment, with the characteristics of high fidelity and transparent support, and thus inevitably it has a bigger file size. But as a nondestructive image format, it is more difficult if you want to reduce its file volume without loss in image quality.
For some webmasters or web designers, most often they need to make the webpage image smaller, in order to get a faster network transmission (faster page loading and faster image downloading) and the corresponding lower bandwidth bills.