Hi Niels, > You may get some 20% more out of it than you allready have: > > http://groups.google.com/group/comp.compression/browse_thread/thread/837b8aa980c3090f > /e8d8cbaa213d3d68?lnk=gst&q=jpegtran#e8d8cbaa213d3d68 Is it lossless conversion or affects image quality? Regards, John