Convert HEIC / HEIF (the iPhone capture format) to AVIF. Configurable quality / encoder effort, optional lossless mode, edge-cached.
Takes an HEIC or HEIF image and returns the same picture as
AVIF. AVIF is the most efficient modern image format — typically
30–50% smaller than JPEG at visually equivalent quality.
Quality is 0–100 (default 50; 50 ≈ JPEG q80). Higher quality
preserves more detail but produces larger files. The encoder
also exposes an `effort` tradeoff: higher numbers encode slower
but produce smaller output. Set `lossless: true` for a
pixel-perfect round-trip (the HEIC itself is still lossy
upstream, but no further loss is added).
Both HEIC and AVIF are ISO-BMFF containers using HEVC (HEIC)
and AV1 (AVIF) respectively, so there is no codec lineage —
the pixels are decoded and re-encoded.
Animated HEIC sequences are not supported — only the primary
image is converted.
Limits to be aware of:
- Maximum image size: 5 megapixels.
- iPhone tile-grid captures (full-resolution photos with the HDR
gain map) are rejected with a clear error pointing you to
re-export the photo at a lower resolution first.