Convert png to sps Online: png2sps
You can use Tom's Editor to easily convert images from
Portable Network Graphics .PNG to Spectrum 512 (smooshed) .SPS.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Portable Network Graphics is an image format with extension PNG.
Spectrum 512 (smooshed) is an image format with extension SPS.