High Efficiency Image File Format

File extension: .heif, .heifs, .heic, .heics Developed by: Moving Picture Experts Group (MPEG) Type of format: Image Container Format MIME: image/heic
As HEIC is a container format, it can contain still images and image sequences (where a file contains more than one single image) that are coded in different formats. Currently, these include HEVC and H.264/MPEG-4 AVC (and JPEG for thumbnail/secondary images), though other coding formats may be added in the future. The main filename extension is .heic (for HEVC codec).