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What is a .PNM file?
A PNM file is a Portable Anymap — a simple, uncompressed raster image covering three sub-formats: PBM (black & white), PGM (grayscale), and PPM (color). Open it with GIMP, IrfanView, or XnView on any platform. For everyday storage, convert to PNG (lossless) or JPEG using ImageMagick or any of those tools.
- Full name
- Portable Anymap
- Category
- Raster Image Files
- Type
- Simple uncompressed raster image (text or binary encoding); umbrella extension for PBM/PGM/PPM
- MIME
- image/x-portable-anymap
- Developer
- Jef Poskanzer (original PBM/PGM/PPM, 1988); Netpbm maintained by Bryan Henderson and community