optipng: optipng (Advanced PNG Optimizer) optipng: optipng: OptiPNG is a PNG optimizer that recompresses image files to a optipng: smaller size, without losing any information. This program also optipng: converts external formats (BMP, GIF, PNM and TIFF) to optimized optipng: PNG, and performs PNG integrity checks and corrections. optipng: optipng: Homepage: http://optipng.sourceforge.net/ optipng: optipng: optipng: