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Convert HEIC to AVIF

Free, private, and instant — your files never leave your device.

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HEIC (High Efficiency Image Container) is the default photo format on iPhones since iOS 11, using HEVC compression to halve the file size of an equivalent JPEG. Outside Apple's ecosystem, HEIC is nearly unusable: Windows requires a paid codec, Android cannot open it at all, and no web platform or email client accepts HEIC natively. AVIF pushes compression further than any other common format — typically 50% smaller than JPEG at equivalent quality, with full browser support in Chrome 85+, Firefox 93+, and Safari 16+. The output will be similar in size to the original HEIC since both use next-generation codecs, but AVIF decodes natively in modern browsers while HEIC does not.

When you’d want this conversion

  • Sharing iPhone photos with Windows or Android users who cannot open HEIC
  • Uploading to social media, cloud storage, or web platforms that reject HEIC files
  • Maximising compression for images served to modern browsers (Chrome 85+, Safari 16+)
  • Taking advantage of AVIF's HDR support for iPhone HDR photos on the web

What to watch for

Both formats are lossy — re-encoding applies compression twice. Start from the highest-quality source you have and keep the quality slider at 80%+ to minimise compounding artifacts.
AVIF requires a modern browser to display: Chrome 85+, Firefox 93+, or Safari 16+. For images shared by email or opened in desktop apps, use WebP or JPEG instead.
Encoding takes several seconds — the browser runs the AV1 encoder in WebAssembly. Larger images take proportionally longer.
From.heic

HEIC

High Efficiency Image Container

  • Lossy compression
  • No transparency
  • Best for: iPhone and iPad camera output, Apple device photos
To.avif

AVIF

AV1 Image File Format

  • Lossy compression
  • Supports transparency
  • Best for: high-efficiency web images, HDR photography, modern web delivery

More HEIC Conversions

Convert HEIC to JPEG Convert HEIC to PNG Convert HEIC to WebP

Convert Other Formats to AVIF

Convert PNG to AVIF Convert JPEG to AVIF Convert WebP to AVIF Convert GIF to AVIF Convert BMP to AVIF Convert SVG to AVIF

Related Tools

Image to PDF Compress HEIC Image Converter

Related Guide

How to Convert HEIC to JPG

How to Use

  1. 1

    Drop your HEIC file or click to browse — the output format is already set to AVIF.

  2. 2

    Adjust the quality slider. 75–80% is a good starting point; lower values produce smaller files with more visible compression.

  3. 3

    Click "Convert to AVIF" — conversion runs entirely in your browser. Expect a few extra seconds — AVIF encoding runs in WebAssembly.

  4. 4

    Download the AVIF.

Frequently Asked Questions

How much smaller will the AVIF be compared to the HEIC?

Typically 40–60% smaller at equivalent visual quality. Exact savings depend on image content; natural scenes compress more than high-frequency graphic detail.

Are my iPhone photos private when I use this converter?

Yes. All HEIC decoding and re-encoding runs entirely in your browser. Your photos are never uploaded to a server — they are read, processed, and exported locally on your device, and nothing leaves it.

Can I stop my iPhone from shooting in HEIC?

Yes — go to Settings → Camera → Formats and choose "Most Compatible." Your iPhone will shoot JPEG from that point on. For existing HEIC photos already on the device, conversion is the only option.

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