https://github.com/tjko/jpegoptim https://github.com/tjko/jpegoptim https://github.com/Kjuly/pngcrush https://github.com/Kjuly/pngcrush You can use both from

https://github.com/tjko/jpegoptim https://github.com/tjko/jpegoptim https://github.com/Kjuly/pngcrush https://github.com/Kjuly/pngcrush You can use both from the cli as part of a build server/push to production. jpegoptim in particular can make very good savings on lots of image types. Example: http://i.imgur.com/Q4ggKXt.png http://i.imgur.com/Q4ggKXt.png No appreciable loss in quality certainly for this use case.