Convert pnm to ing Online: pnm2ing
You can use Tom's Editor to easily convert images from
Portable aNy Map .PNM to ING 15 .ING.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
PNM images are uncompressed 24 bit RGB images. Can cannot store Alpha channel. PNM images come in 2 types: binary and text. Especially popular on Linux.
ING 15 is an image format with extension ING.