Robin Image Optimizer Pro Nulled is a free WordPress plugin to optimize and compress images. Robin Image Optimizer Nulled uses an intelligent optimization mode to reduce the size of JPG and PNG images up to 80%.
Reducing the size of images is possible due to the selective decreasing of colors and removing EXIF-data.
Despite the great economy in terms of the image size, the image quality remains pretty much the same.
If you have many images on your website, this plugin will help you to make the website 50% faster.