jpegoptim

Optimise JPEG images.

Optimise a set of JPEG images, retaining all associated data:

jpegoptim {{image1.jpeg}} {{image2.jpeg}} {{imageN.jpeg}}

Optimise JPEG images, stripping all non-essential data:

jpegoptim --strip-all {{image1.jpeg}} {{image2.jpeg}} {{imageN.jpeg}}

Force the output images to be progressive:

jpegoptim --all-progressive {{image1.jpeg}} {{image2.jpeg}} {{imageN.jpeg}}