Convert fts to pnm Online: fts2pnm

You can use Tom's Editor to easily convert images from
Flexible Image Transport System .FTS to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

FTS

Flexible Image Transport System is an image format with extension FTS.

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.