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.