Are HEIF and HEIC the Same Thing?
HEIF and HEIC get used interchangeably — even Apple's documentation blurs the line. Strictly speaking they are not the same thing: one is a container, the other is what goes inside it. Understanding this makes .heif files a lot less scary.
Container vs codec
HEIF (High Efficiency Image File Format) is the container standard from MPEG — it defines how things are stored: where the main image goes, where thumbnails and metadata live. HEIC is the most common use of that standard: a HEIF container holding HEVC-encoded imagery.
A video analogy: HEIF is the MP4 box; HEVC is the video stream inside. The box doesn't determine quality — the codec does.
The extension difference
iPhone photos are essentially always .heic. Files named .heif usually come from Samsung and other Android phones' HEIF photo option, or from professional toolchains. What's inside can be identical — only the naming habit differs.
What it means in practice
For most conversion tools, .heic and .heif are treated the same: what decides whether a file opens is the HEVC payload inside the container, not the extension. Software that reads .heic almost always reads .heif.
What to do with a .heif file
Treat it exactly like .heic. This site's converters accept both extensions and identify the format from file content — converting to JPG or PNG works identically.