The NetPBM utilities (formerly PBMplus) is a package of myriad programs that converts and changes graphics formats and simple editing and analysis of images. Editing functions include scaling, cropping, quantisation and dithering, colorizing, blurring, and dimming. Over 50 graphics formats are supported, including JPEG, PNG, GIF, TIFF, BMP, XWD, XBM, and G3 fax.