HEIC (High Efficiency Image Format) is a file format for storing images and image sequences. It was developed by MPEG (Moving Picture Experts Group) and is designed to provide high-quality images while using less storage space than other formats such as JPEG. HEIC files can support both lossy and lossless compression and can store multiple images in a single file. HEIC files are commonly used on Apple devices, as they are the default image format for photos taken with iOS devices.