Smush

Smush is a plugin for WordPress that automatically compresses and optimizes images. This shortens the loading time of the page and the plugin helps to save bandwidth. Features include changing image sizes, lossless compressions, and setting the maximum width and size. With Bulk Smush, up to 50 images can be optimized and compressed at the same time. The plugin also recognizes incorrect image sizes that slow down the website. Smush processes the image formats PNG-, JPEG- and GIF.