Convert pgx to pnm Online: pgx2pnm

You can use Tom's Editor to easily convert images from
PGX of JPEG 2000 .PGX to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

PGX

PGX of JPEG 2000 is an image format with extension PGX.

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.