What HEIC to AVIF conversion does

Convert a HEIC photo to AVIF directly in your browser, with adjustable quality. 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 can shrink UI graphics and photos for sites that already serve modern image formats.

Transparency and output quality

Transparent pixels from the source stay transparent when the browser AVIF encoder supports alpha. This tool does not flatten onto an arbitrary background before encoding. The quality slider defaults to 90%. Lower values usually shrink the file and can introduce compression artifacts. Smaller files are not guaranteed for every source image.

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.
• Multi-image HEIC containers — bursts or Live Photos — download as multiple AVIF files, or a ZIP when there is more than one. Every decoded image is kept; none are silently discarded.
• 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 can shrink UI graphics and photos for sites that already serve modern image formats.

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 stay transparent when the browser AVIF encoder supports alpha. This tool does not flatten onto an arbitrary background.

What happens with a multi-image HEIC file?

Every decoded image is kept — a single-image HEIC downloads as one file, and a multi-image HEIC (a burst or Live Photo) downloads as a ZIP containing every decoded 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.