Convert acs to pnm Online: acs2pnm

You can use Tom's Editor to easily convert images from
AtariTools-800 font .ACS to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

ACS

AtariTools-800 font is an image format with extension ACS.

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.