Convert ybm to pnm Online: ybm2pnm

You can use Tom's Editor to easily convert images from
Bennet Yee "face" .YBM to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

YBM

Bennet Yee "face" is an image format with extension YBM.

PNM

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.