HEIC to AVIF Converter
Convert iPhone HEIC photos to AVIF — best-in-class compression, up to 50% smaller than JPG. No iCloud needed.
Best for web publishers converting iPhone photo libraries to the smallest possible web-ready format.
Drop files here
or click to browse · paste from clipboard
Accepts .HEIC, .HEIF · Up to 1,000 files
How it works
Drop your files
Drag and drop, click to browse, or paste from clipboard. Up to 1,000 files at once.
Choose settings
Adjust quality, format, and other options to match your needs.
Click Convert
Everything runs in your browser via WebAssembly. HEIC to AVIF Converter happens locally — no server involved.
Download
Download files individually or grab all at once as a ZIP.
Frequently asked questions
No. Conversion runs entirely in your browser. Your HEIC files never leave your device.
AVIF achieves 40–50% better compression than JPG at the same visual quality, and 20–30% better than WebP. If you are converting iPhone photos for web use, AVIF gives the smallest files. Browser support covers Chrome, Edge, Firefox, and Safari 16+.
Both are based on modern video codec compression — HEIC uses HEVC (H.265), AVIF uses AV1. AVIF achieves slightly better compression than HEIC at equivalent quality. The key difference is ecosystem: HEIC is Apple's camera format, locked to Apple devices. AVIF is an open web standard supported by all major browsers. Converting from one to the other loses no meaningful quality.
Yes, this can happen with HDR or wide-gamut HEIC photos taken on newer iPhones. The HEIC is encoded in Display P3 color space, which can be misinterpreted during conversion. AVIF supports wide color gamut too, but the mapping between the two is not always perfect. It affects a small percentage of photos, particularly those shot in bright light or with Smart HDR enabled.
AVIF is supported in Chrome (since 85), Edge (since 121), Firefox (since 93), and Safari (since 16.4). That covers over 93% of global web traffic. For broader compatibility with older Safari or software, convert to WebP or JPG instead.