HEIF
/heɪf/ · noun · image format · High Efficiency Image File Format
The broader container standard that HEIC is Apple’s implementation of.
In more detail
HEIF is the general-purpose container standard for storing images and image sequences compressed with modern codecs. HEIC is the specific HEVC-encoded flavour Apple uses.
In everyday use the two names are often treated interchangeably, and files may carry either a .heic or .heif extension.
HEIF, HEIC, and file extensions
HEIF describes the ISO container format, while HEIC commonly describes HEIF content encoded with HEVC. Apple popularised the .heic extension, but other HEIF profiles can use different codecs and may appear with a .heif extension.
This distinction explains why two HEIF-family files do not always behave identically. Software needs support for both the container structure and the codec used for the image payload. An app that handles Apple HEIC photos may still reject a less common HEIF profile.
Why HEIF is useful
HEIF can store image sequences, thumbnails, alpha channels, depth maps, transformations, and editing instructions without baking every change into a new full-size image. It is designed for richer photo collections, not only smaller single images.
Use HEIF inside workflows that explicitly support it. For publishing, forms, or sharing with an unknown recipient, a converted JPG or PNG is safer. Conversion may flatten auxiliary images and edits, so retain the source file when those elements matter.
Key points
- HEIF is the general container standard; HEIC is a common HEVC-based profile.
- Reading a HEIF file requires support for its container and its image codec.
- Conversion can discard image sequences, depth maps, or editable transformations.