WP Smush Pro Plugin Nulled is a very reliable and simple image optimization WordPress plugin developed by WPMU DEV. The plugin enables the compression of images in reducing upload size without affecting the visual quality of the image.
The WP Smush Pro plugin also assists you in obtaining images from its servers using the 45-point image CDN. You can achieve this by togging the image CDN service on and automatically proceeding to serve images.
The free version of the plugin is limited, to maximize the plugin features the pro version should be utilized which is available for free download below. Its pro feature extends to converting and serving WebP image format to WordPress users. The WebP format is recommended by Google Pagespeed for better site performance which is 25% smaller than other image formats.