Why convert HEIC to AVIF?

AVIF can meaningfully shrink photos for sites that already serve modern image formats.

What happens with a multi-image HEIC file?

Every decoded image is kept. A single-image HEIC downloads as one file; 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 before decoding.

Diagram showing a HEIC file converting into a AVIF file inside a browser window

Image guides

How to Convert HEIC to AVIF in Your Browser

Converting a HEIC or HEIF photo to AVIF produces a modern AVIF file with adjustable quality, encoded with the browser canvas API and verified as a real image/avif download. This guide covers the steps, quality control, and transparency behavior.

Ready to try the tool this guide describes?

Open HEIC to AVIF →

Step-by-step conversion

Open /tools/heic-to-avif.
Choose a HEIC or HEIF file — the content is validated before conversion.
Adjust AVIF quality if needed.
Select Convert & download.
Save the .avif file from your browser downloads.

Transparency and quality

Transparent pixels from the source stay transparent when the browser AVIF encoder supports alpha.

Source-specific behavior

HEIC/HEIF containers can hold more than one image (a burst or a Live Photo). A single-image file downloads as one output file; a multi-image file downloads as a ZIP with every decoded image converted, so nothing is silently dropped.

Privacy

Conversion runs locally in your browser. The file is not uploaded to Looty Tools servers for this workflow.

Convert HEIC to AVIF FAQ

Why convert HEIC to AVIF?: AVIF can meaningfully shrink photos for sites that already serve modern image formats.
What happens with a multi-image HEIC file?: Every decoded image is kept. A single-image HEIC downloads as one file; a multi-image HEIC (a burst or Live Photo) downloads as a ZIP containing every decoded image, never just the first one.
Does AVIF output keep transparency?: Transparent pixels from the source stay transparent when the browser AVIF encoder supports alpha.
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 before decoding.

Related guides

Open the tool

Jump into HEIC to AVIF when you are ready to process your files.

Open HEIC to AVIF →

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