It's not even just about bandwidth. You're reducing page load time, and therefore increasing revenue. http://www.fastcompany.com/1825005/how-one-second-could-co

It's not even just about bandwidth. You're reducing page load time, and therefore increasing revenue. http://www.fastcompany.com/1825005/how-one-second-could-cost-amazon-16-billion-sales http://www.fastcompany.com/1825005/how-one-second-could-cost... If you're a designer/developer on Mac I would strongly recommend ImageOptim (https://imageoptim.com/ https://imageoptim.com/). It supports Zopfli and has a simple drag-n-drop user interface.