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HEIF (High Efficiency Image Format) is a versatile image file format designed for improved compression, resulting in high-quality images with smaller file sizes compared to traditional formats like JPEG. Developed by the Moving Picture Experts Group (MPEG), HEIF supports a wide range of features including transparency, 16-bit color depth, and the ability to store multiple images in one file, making it suitable for live photos and burst photography. However, its adoption has been gradual, and not all software and devices support HEIF files natively, which can necessitate conversion for broader compatibility.

SIXEL is a bitmap graphics format that uses six pixels per character cell to represent images, primarily developed for DEC (Digital Equipment Corporation) terminals in the 1980s. It allows for the display of images directly in terminal emulators that support the SIXEL standard, making it possible to visualize graphics in command-line environments without relying on external graphics programs.