jScale is a Java-based utility that you can use to resize images. jScale currently supports PNG, TIFF, JPEG, BMP, and GIF scaling. jScale also supports transcoding between all the previously mentioned formats with the exception of GIF encoding. In other words, a user can transcode (convert) between all image formats, though transcoding to GIF is not currently supported.Free and open source Java-based image resizing utility
Download jScale 0.6