Tom's Editor BLOG

Convert pnm to bw Online: pnm2bw

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

Go to Tom's Editor


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.


Silicon Graphics RGB is an image format with extension BW.