HEIC to AVIF Converter Free

Convert HEIC to AVIF format with our HEIC to AVIF Converter instantly with adjustable quality.

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AVIF is the image format built on the AV1 video codec, developed by the Alliance for Open Media (the same group behind AV1 video). Like Apple's HEIC, it's a next-generation format that beats JPG on compression — but unlike HEIC, it's supported natively by every major browser. If you're publishing an iPhone photo to the web, converting HEIC to AVIF gets you the smallest file size a browser will actually render without a plugin.

HEIC vs AVIF: what actually changes

  • Codec: HEIC is built on HEVC (H.265); AVIF is built on AV1. Both are modern, efficient codecs in a similar compression class.
  • Browser support: This is the real reason to convert — Chrome, Firefox, Edge, and Safari 16+ all render AVIF natively in an `<img>` tag. HEIC generally doesn't render in any browser.
  • Web performance: AVIF commonly produces 30-50% smaller files than JPG at equal visual quality, which directly helps Largest Contentful Paint (LCP) scores.
  • When not to use it: Very old browsers and some desktop/email software don't support AVIF — keep a JPG fallback for those contexts.

How to convert HEIC to AVIF

  1. Upload: Drag and drop your HEIC files.
  2. Set quality: 60-75% is typically enough for web use given AVIF's efficiency; go higher for archival copies.
  3. Convert: Runs locally via WebAssembly — no upload, no server round-trip.
  4. Download: Individually or as a ZIP for batches.

Frequently Asked Questions

Is AVIF actually smaller than HEIC?

They're close — both use next-generation codecs (AV1 for AVIF, HEVC for HEIC) in a similar compression range. AVIF's real advantage isn't file size over HEIC, it's that browsers display it natively while HEIC generally doesn't render in a browser at all.

Why convert HEIC to AVIF instead of just using JPG?

For web delivery, AVIF typically produces 30-50% smaller files than JPG at equal visual quality, which directly improves Core Web Vitals (LCP). Use JPG instead when you need guaranteed compatibility with older software or email clients.

Do all browsers support AVIF?

Modern Chrome, Edge, Firefox, and Safari (16+) support it. Very old browsers and some desktop viewers don't — keep a JPG fallback for those cases.

Is it safe to use this browser-based converter?

Yes. All processing happens locally via WebAssembly — photos are never uploaded to a server.