Convert ice to pnm Online: ice2pnm

You can use Tom's Editor to easily convert images from
Interlace Character Editor font .ICE to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

ICE

Interlace Character Editor font is an image format with extension ICE.

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.