Convert sps to pnm Online: sps2pnm

You can use Tom's Editor to easily convert images from
Spectrum 512 (smooshed) .SPS to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

SPS

Spectrum 512 (smooshed) is an image format with extension SPS.

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.