This is the official Kraken package for Umbraco. With it you can compress and optimize your images in Umbraco.
You can find our package on our.umbraco.org here: https://our.umbraco.org/projects/backoffice-extensions/official-kraken-image-optimizer-plugin-for-umbraco/
Umbraco CMS: http://umbraco.com
Kraken Image Optimizer: https://kraken.io/