Convert psid to pnm Online: psid2pnm

You can use Tom's Editor to easily convert images from
PostScript image .PSID to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

PSID

PostScript image is an image format with extension PSID.

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.