- Extension
- .g4
- .heif
- Format
- Binary
- Binary
- Category
- Fax
- Raster Image
- Developer
- Computer Fax Systems (CFS)
- Apple
- Description
- Group 4 (G4) used for black and white lossless compression to maintain high-quality images, commonly used in TIFF format compression by fax machines. A picture is seen as black dots and lines on a blank page; the fewer the dots and lines are, the lesser the file size.
- Based on HEVC (High-Efficiency Video Coding), the HEIF format is an image file container with one or multiple images and is the default image format for Apple Live Photos. It replaced the JPEG format as it's smaller in size and has lossless compression ensuring high-quality photos.
- MIME Type
- image/g4fax
- image/heif
