Convert HEIC to AVIF
Free online HEIC to AVIF converter. Drag and drop files, convert in batch, and download, without ever uploading to a server.
Why convert HEIC to AVIF?
HEIC to AVIF bridges Apple's camera format to the smallest common web image format. When your site serves AVIF (with WebP/JPG fallbacks), converting iPhone HEIC straight to AVIF cuts bytes without a round-trip through a server.
Tips
- HEIC is decoded locally via wasm, then encoded to AVIF with libavif.
- Default quality 50 favors size; raise only if you see banding.
- Do not re-encode an existing AVIF expecting smaller output. Decoding and re-encoding rarely wins.
Frequently asked questions
How do I convert HEIC to AVIF?
Drop your HEIC file into the converter above, adjust the quality if needed, and click "Convert to AVIF". The conversion happens entirely in your browser. Your file is never uploaded to any server.
Is the HEIC to AVIF conversion lossless?
HEIC from iPhones is usually already lossy (HEVC). This tool decodes those pixels then writes AVIF with controllable quality. Use 85%+ for photos.
Is there a file size limit?
The tool can handle files up to about 20 MB per image. Since processing happens in your browser, the practical limit is your device's available memory. Most modern devices can comfortably batch-convert dozens of images at once.
Are my HEIC files uploaded to your servers?
No. All HEIC to AVIF conversion happens entirely client-side. HEIC is decoded with a wasm library loaded only when needed. Your files never leave your browser.
Is it strange that HEIC and AVIF are both based on video codecs?
It isn't a coincidence, and it's a big part of why both exist. HEIC is built on HEVC (H.265), the video codec that followed H.264. AVIF is built on AV1, the newer, royalty-free codec developed as an open alternative to HEVC. Both formats work the same way under the hood: treat a still photo like a single video frame and reuse a video codec's compression tricks to shrink it. AVIF was designed in part because AV1 has no licensing fees attached, unlike HEVC. That is one reason AVIF has spread to far more browsers and platforms than HEIC ever did.