HEIC/HEIF to AVIF — Online Image Converter
Convert HEIC/HEIF to AVIF online. Private, client-side — no uploadrequired. Fast batch converter.
About HEIC/HEIF to AVIF
HEIC stores phone photos with HEVC-based compression as the iPhone default since 2017. AVIF re-encodes the still with the AV1 codec, often trimming further bytes for web delivery. Both formats are recent, so older viewers may open neither; keep a JPEG copy for sharing. Bursts and depth data stay behind because the target holds a single image. Transparency maps across where the source carries alpha. Export from the original at high quality, since both passes are lossy and stacked passes soften detail.
Why convert HEIC/HEIF to AVIF?
- Flexible size with AVIF lossy or lossless compression - lossy for smaller files, lossless for exact quality.
- Keep animation and transparency where supported.
- Private, no upload - runs in your browser.
HEIC/HEIF vs AVIF
| Animation | Yes | Yes |
|---|---|---|
| Transparency | Yes | Yes |
| Compression | lossy or lossless | lossy or lossless |
| Typical use | HEIC is Apple's HEVC-based photo format used as the iPhone default since 2017. | AVIF encodes stills and sequences with the AV1 codec for compact files. |
When not to convert HEIC/HEIF to AVIF
- Skip AVIF for archival masters: lossy compression discards detail, so keep the HEIC/HEIF original.
- Keep a master copy: repeated exports stack small losses, so archive HEIC/HEIF before batch AVIF shares.
Limits
Starting point: HEIC/HEIF - HEVC-based photos captured on iPhones. Windows and older tools may need a codec pack to open it. Older viewers may not open it; keep a JPEG or PNG copy for sharing. Set the quality slider near 80-90 for AVIF photos from HEIC/HEIF, and keep dimensions matched to the source.
How conversion works
Conversion runs entirely in your browser with the WASM image engine. Files never leave your device.