Image Tuner is a free batch image resizing, renaming, conversion and watermarking tool with a super-intuitive and straightforward interface. Based on an extremely fast proprietary image processing engine, this award-winning software has a bare minimum of controls and will help you with the most typical image-related tasks. The list of operating systems supported by Image Tuner includes Windows 98/ME/NT/2000/XP/Vista/7 (32- and 64-bit).