Open PPM Files

PPM (short for Portable Pixmap) is a raster graphics format created to make file transfers between a wide variety of platforms a lot easier because PPM image files are formatted using plain text.

On top of featuring inbuilt support for 24-bit colors content, PPM files are also designed to store extra details such as the image's maximum color value, as well as its width and height values.

Furthermore, when users need to open PPM images on their Macs, they have to find an image viewer compatible with this graphics format.

Unfortunately, even though it provides cross-platform compatibility between a multitude of apps due to its text-based structure, PPM is also an uncompressed bitmap format that's a lot less efficient when compared with other similar graphics formats.