Convert pgm to png Online: pgm2png

You can use Tom's Editor to easily convert images from
Portable aNy Map .PGM to Portable Network Graphics .PNG.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

PGM

Portable aNy Map is an image format with extension PGM.

PNG

Portable Network Graphics is an image format with extension PNG.