NOTE: This plugin is incompatible with Paint.NET 4.0.  Use the most recent version found here: https://forums.getpaint.net/topic/114190-optipng-filetype-2019-05-07/     This plugin integrates OptiPNG with Paint.NET. It optimizes PNG to make them smaller, which is good for web use. Compiled DLL: OptiPNG plugin.zip Both the DLL and optipng.exe need to be in the FileTypes directory. November 30 - updated to OptiPNG 0.62, some minor changes suggested by antond October 24