Lossless Compression – File sizes will be reduced by removing unnecessary image information (and statistical redundancies) resulting in no loss in quality. Lossy Compression – File sizes will be reduced significantly resulting in a slight loss in image quality that is visible. Choose this option if you want your website to load as fast as possible. Glossy Compression – Glossy is the best choice if you care about your website’s load time and believe that a slight loss in page speed is an acceptable compromise for top-notch image quality.