Image Format Comparison

HEIF vs HEIC: What is the Difference?

HEIF (High Efficiency Image File Format) is the container standard; HEIC (High Efficiency Image Coding) is Apple's implementation of HEIF using the HEVC (H.265) codec for still images. The relationship is like MP4 (container) and H.264 (codec). HEIF can contain images encoded with different codecs; HEIC specifically means HEIF with HEVC encoding — which is what iPhone uses.

HEIFvsHEIC

Quick Verdict

Use HEIF when…

HEIF is the standard — the container format you'll encounter when thinking about the technology broadly. Images encoded with AV1 in a HEIF container are called AVIF, not HEIC.

Use HEIC when…

HEIC is what you'll find on iPhone and iPad. When someone says their iPhone saves as HEIC, they mean HEIF container with HEVC-encoded images. For practical purposes, HEIC is the relevant format for Apple devices.

HEIF vs HEIC: Feature Comparison

Feature	HEIF	HEIC
Type	Container standard (ISO 23008-12)	Apple's implementation of HEIF
Codec	Any (HEVC, AV1, etc.)	HEVC (H.265) specifically
File extension	.heif or .heic depending on codec	.heic (Apple devices)
iPhone default	HEIC is iPhone's HEIF implementation	Yes — iPhone saves in HEIC
Other implementations	AVIF (HEIF + AV1) is also HEIF	Specific to Apple ecosystem
Compression	Depends on codec	HEVC — approximately 50% better than JPG
Support	Depends on codec inside	macOS, iOS native; Windows with codec pack
Convert to JPG?	Yes (same process as HEIC)	Yes (or change Settings → Camera → Most Compatible)

When HEIF wins

✓Type: Container standard (ISO 23008-12)
✓Codec: Any (HEVC, AV1, etc.)
✓File extension: .heif or .heic depending on codec

When HEIC wins

✓Type: Apple's implementation of HEIF
✓Codec: HEVC (H.265) specifically
✓File extension: .heic (Apple devices)

Frequently asked questions

Can I use HEIF and HEIC interchangeably?

In casual conversation, yes — most people use them interchangeably to mean the images taken by iPhone. Technically, HEIC is one specific implementation of HEIF (using HEVC). AVIF is another HEIF implementation (using AV1). When a tech spec says HEIF, it means the container; when it says HEIC, it means specifically the Apple iPhone format.

Why does iPhone say HEIC in settings but files sometimes end in .heif?

Older iOS versions or certain export situations may use .heif as the extension. The content is the same — HEVC-encoded images in a HEIF container. Renaming .heif to .heic doesn't change the file content. Both extensions work the same way.

How do I convert HEIC to JPG on iPhone?

Change camera settings: go to Settings → Camera → Formats → Most Compatible. This makes iPhone capture as JPG going forward. For existing HEIC files: share them via AirDrop to Mac (auto-converts to JPG), email them (iOS converts to JPG when attaching), or use an online converter.