The Image Optimizer app uses proven technologies to compress your images. It uses Kraken.io to provide you with the highest quality of images after compression. You can receive your JPEG, GIF, and PNG files optimized to make your store more attractive and improve page speed.
The Image Optimizer app has no impact on your theme and does all the work on its own server, without connecting to a third-party service—which means faster image optimization. You can edit each image individually by choosing them from your media library or go with bulk compression that takes all the images you have.
Image Optimizer is completely free to use and doesn’t have different pricing plans.