Convert ptx to pnm Online: ptx2pnm
You can use Tom's Editor to easily convert images from
V.Flash PTX .PTX to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
V.Flash PTX is an image format with extension PTX.
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.