Image Format Comparison

HEIC vs AVIF: Apple's iPhone Format vs the Open Standard

HEIC and AVIF are both next-generation image formats that leave JPG and PNG behind in compression efficiency. HEIC is Apple's iPhone format based on HEVC video codec technology. AVIF is the web community's answer — royalty-free, open standard, slightly better compression. Neither replaces JPG universally yet because browser/device support isn't complete, but both are worth understanding.

HEICvsAVIF

Quick Verdict

Use HEIC when…

HEIC is forced on iPhone users — it's the default camera format. You're not choosing HEIC; your iPhone is choosing it for you. For sharing and web use, convert to JPG or WebP.

Use AVIF when…

Use AVIF for web images where you want the best compression-to-quality ratio. AVIF is supported in 94%+ of browsers and achieves better compression than HEIC at equal quality.

HEIC vs AVIF: Feature Comparison

Feature	HEIC	AVIF
Browser support	No — browsers don't support HEIC	Chrome, Firefox, Edge, Safari (partial)
iPhone camera	Default format (iOS 11+)	Not supported for camera recording
Compression vs JPG	~50% smaller at equal quality	~50-60% smaller at equal quality
Transparency	Yes	Yes
HDR support	Yes	Yes
Royalties	Yes — MPEG LA/HEVC Advance	Royalty-free
Windows support	Requires paid codec	Growing (Edge, Chrome)
Open standard	No — ISO standard with patent encumbrances	Yes — Alliance for Open Media

When HEIC wins

✓Browser support: No — browsers don't support HEIC
✓iPhone camera: Default format (iOS 11+)
✓Compression vs JPG: ~50% smaller at equal quality

When AVIF wins

✓Browser support: Chrome, Firefox, Edge, Safari (partial)
✓iPhone camera: Not supported for camera recording
✓Compression vs JPG: ~50-60% smaller at equal quality

Frequently asked questions

Is HEIC or AVIF better quality?

At equal file sizes, AVIF achieves slightly better quality than HEIC (5-10% improvement in compression efficiency). Both are dramatically better than JPG. For web delivery: AVIF is better (royalty-free, broader browser support via Chrome/Firefox). For iPhone shooting: HEIC is what you get — convert to JPG for sharing, or to WebP/AVIF for web use.

Why can't browsers display HEIC photos from iPhone?

HEIC uses the HEVC (H.265) codec, which is patented and requires licensing fees. Browser makers chose not to build in HEIC support because of these licensing requirements. Safari is the exception — Apple's browser supports HEIC natively since Safari 17. For maximum compatibility: convert iPhone HEIC photos to JPG or WebP for web use.