PGM (.pgm)
PGM (Portable Graymap) is the grayscale sibling of PPM in the Netpbm family, storing a single brightness value per pixel with no color information.
Frequently asked questions
What is a .pgm file?
PGM (Portable Graymap) is the grayscale sibling of PPM in the Netpbm family, storing a single brightness value per pixel with no color information.
What is PGM good for?
PGM works well for grayscale-only image-processing pipelines, simple computer vision experiments.
What are the downsides of PGM?
No color support Uncompressed and rarely used outside tooling
Can I convert PGM in FileLab?
PGM isn't yet supported for in-browser conversion here — it typically needs specialized desktop software to open or produce reliably.