Convert pfm to pnm Online: pfm2pnm

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

Go to Tom's Editor

PFM

Portable Float Map is an image format with extension PFM.

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.