pnmtopng

Convert a PNM image file to PNG image format. More information: https://netpbm.sourceforge.net/doc/pnmtopng.html.

• Read a PNM image as input and produce a PNG image as output:

pnmtopng path/to/file.pnm > path/to/file.png

• Display version:

pnmtopng -version