| Extension | PGM |
| Full Name | Portable graymap format |
| Type | Image |
| Mime Type | application/octet-stream |
| Format | Binary |
| Tools | PGM Converters, Create Cookie Cutter, PGM Viewer |
PGM is a Portable Grey Map, and comprises of a single byte for each pixel in the image. Hence the pixel values can only be from 0 to 255 and are used to represent the brightness of a grey scale image.
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