Convert flif to pgm Online: flif2pgm
You can use Tom's Editor to easily convert images from
Free Lossless Image Format .FLIF to Portable aNy Map .PGM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Free Lossless Image Format is an image format with extension FLIF.
Portable aNy Map is an image format with extension PGM.