HEIC to AVIF Converter

What HEIC to AVIF conversion does

Convert a HEIC photo from your iPhone to AVIF directly in your browser, with adjustable quality. HEIC and AVIF are close cousins — both are still-image formats built on modern video codecs (HEVC for HEIC, AV1 for AVIF) — but AVIF has far broader support outside Apple's own ecosystem. Encoding uses the browser canvas API and is verified as a real image/avif download before it reaches your downloads folder.

How to convert HEIC to AVIF

1. Choose a HEIC file.
2. Adjust AVIF quality if needed.
3. Select Convert & download.
4. Save the .avif file from your browser downloads.

Why use this conversion

AVIF keeps the same kind of aggressive, next-generation compression HEIC uses, but without HEIC's Apple-centric support gap — most browsers, image libraries, and websites that reject a HEIC file straight off an iPhone will happily display or ingest AVIF instead.

Transparency and output quality

Transparent pixels from the decoded HEIC image stay transparent when the browser's AVIF encoder supports alpha. This tool does not flatten onto an arbitrary background before encoding. The quality slider defaults to 90%. Because the source photo is already HEVC-compressed inside the HEIC container, re-encoding to AVIF at a similar quality level often lands close in size rather than shrinking dramatically further; lower quality values usually shrink the file more but can introduce visible compression artifacts.

Privacy and local processing

• Processing occurs locally in the browser.
• Files are not uploaded to Looty Tools for conversion.
• Converted files remain on your device.

Limits and known issues

• Input: HEIC/HEIF (.heic, .heif) only, up to 25.0 MB and 8,192 px per side.
• Canvas AVIF encoding is Chromium-first today. Unsupported browsers show a clear error instead of a mislabeled download, and usage is not recorded for a failed conversion.
• A multi-image HEIC — a burst or Live Photo — produces one AVIF file per captured frame, delivered as a ZIP when there's more than one; every decoded image is kept.
• Metadata is not preserved in the downloaded file.

Related tools

• HEIC to AnyConvert HEIC photos into multiple common output formats.
• HEIC to BMPConvert HEIC photos to uncompressed BMP bitmaps.
• HEIC to TIFFConvert HEIC photos to TIFF for print and archival use.

HEIC to AVIF FAQ

Why convert HEIC to AVIF?

AVIF keeps the same kind of aggressive, next-generation compression HEIC uses, but without HEIC's Apple-centric support gap — most browsers, image libraries, and websites that reject a HEIC file straight off an iPhone will happily display or ingest AVIF instead.

Can every browser create AVIF?

No. Canvas AVIF encoding is Chromium-first today. The tool probes encoding support and verifies the download is image/avif — unsupported browsers get a clear error instead of a mislabeled download.

Does AVIF output keep transparency?

Transparent pixels from the decoded HEIC image stay transparent when the browser's AVIF encoder supports alpha. This tool does not flatten onto an arbitrary background.

What happens with a multi-image HEIC file?

Each image inside a multi-image HEIC — a burst or Live Photo — becomes its own AVIF file. A single-photo HEIC downloads one .avif; a burst or Live Photo downloads a ZIP with one AVIF per captured image, never just the first one.

Are my files uploaded?

No. Conversion runs locally in your browser and does not upload your file to Looty Tools servers.

What is validated before conversion?

The file must actually be a HEIC/HEIF container — the tool checks the ISO-BMFF ftyp brand, not just the filename or extension, before decoding.