Convert pl4 to pnm Online: pl42pnm

You can use Tom's Editor to easily convert images from
PL4 .PL4 to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

PL4

PL4 is an image format with extension PL4.

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.