Convert to MNG Online Tool.
MNG stands for Multi-image Network Graphics, meaning an MNG file is an animated image file saved under this format. It has multiple PNG images shown in motion or as an animation. These files resemble animated GIF files but with higher compression and multi-level transparency. Unfortunately, MNG is not a popular choice among many. Some programs, including Mozilla Firefox, stopped supporting it. Various photo viewing and editing programs can help open MNG files. These programs include Gwenview, Irfanview, ImageMagick, MPlayer, mngPlay, and GIMP. In addition, you can open them across multiple operating systems, from Windows and Android to Linux and macOS.