Image compression can not only improve the image loading speed when accessing, but also reduce server bandwidth. EWWW Image Optimizer is a image optimization plugin. This Plugin can automatically optimize your images, the image has been uploaded this will be optimized, EWWW Image Optimizer achieve the optimization effect mainly by reducing the size of the image, the plugin has settings Options in admin panel, you can use lossy compression picture, lossless compression picture in default. It can optimize the images that you have already uploaded, convert your images automatically to the file format that will produce the smallest image size.
Reduce image sizes in WordPress including NextGEN, GRAND FlAGallery, FooGallery and more using lossless/lossy methods and image format conversion. EWWW Image Optimizer is very popular image optimization plugin, more than 400,000 downloads.