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OptimizeFree PGM to HEIC Converter
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PGM
Portable Gray Map
Portable Gray Map (PGM) is a file format for grayscale images. It is a lowest common denominator grayscale file format that most image processing programs can read and write.
Main usage
PGM is used for storing images such as X-ray images, medical images, and other scientific images.
- 8-bit grayscale
- 1-bit black and white
- 24-bit RGB color
Main features
HEIC
High Efficiency Image File Format
High Efficiency Image File Format (HEIF) is a container format for individual images and image sequences. It is based on the ISO/IEC 23008-12:2017 standard and is developed by the Moving Picture Experts Group (MPEG).
Main usage
HEIF is mainly used for storing photos and videos on mobile devices, such as iPhones and iPads. It is also used for storing images on the web and for archiving images.
- High compression ratio
- Supports 16-bit color depth
- Supports animation
- Supports metadata