Convert
HEIC to AVIF Converter
Convert iPhone HEIC photos to AVIF, a modern format that browsers can display and that stays close to HEIC in size. Conversion runs in your browser.
Your images never leave your device
How to use HEIC to AVIF
- Drop your HEIC files on the page or pick them from your device.
- Wait while each file is converted to AVIF. AVIF encoding is slow, and large photos can take several seconds.
- Download the AVIF files one by one, or all together as a zip.
Frequently asked questions
Is AVIF smaller than HEIC?
Often it is close, and sometimes smaller. Both are very efficient. The real gain is against JPG, where AVIF is commonly a third to a half smaller at similar quality.
Why does converting to AVIF take longer than to JPG?
AVIF encoding does a lot more work to find the smallest representation of the image, and it runs on your device. Large photos can take several seconds each. JPG and WebP finish much faster.
Can I upload an AVIF to social media or email it?
Often not. Many platforms and mail programs do not accept AVIF yet and some will refuse the upload. If the photo is going to a person or a platform rather than a website, JPG is the safe choice.
Are my HEIC files uploaded anywhere?
No. The conversion runs in your browser using WebAssembly, so your HEIC files stay on your device. There is no signup, no watermark and no cost, and you can convert a whole batch and download it as a zip.
About HEIC to AVIF
HEIC and AVIF are close relatives. Both store a video-codec frame inside a HEIF-style container, and both aim for the same thing: photos at a fraction of JPG's size. The difference is licensing and reach. HEIC depends on HEVC, which carries patent licensing, so most browsers other than Safari do not display it. AVIF is built on the royalty-free AV1 codec and is supported by current versions of Chrome, Edge, Firefox and Safari. That makes HEIC to AVIF the natural route to keep small files while getting images that work on a web page.
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Encoding to AVIF is slow, and large photos can take several seconds each, so give a big batch some time. Both formats are lossy, so the picture is compressed twice; at normal viewing size the result usually looks the same, and the file is often as small as the HEIC or smaller. GPS location and other metadata are not carried over, and orientation is applied so portrait photos stay upright. Support outside browsers is still uneven, so email clients, print services and some editors will not open an AVIF.
HEIC is lossy, compressed with HEVC (H.265); AVIF is lossy or lossless, compressed with AV1. Both formats can store transparency, so transparent areas in the HEIC file stay transparent. For scale, a 12-megapixel photo is typically 1.5 to 3 MB as HEIC and 1 to 2.5 MB as AVIF. Compatibility: Recent versions of Chrome, Edge, Firefox and Safari display it. Support in editors, email clients and upload forms is still patchy.