Convert HEIC to AVIF

HEIC to AVIF: the quick version

HEIC to AVIF, done in your browser. Convert.diy converts your HEIC files to AVIF instantly — no uploads, no watermarks, no sign-up, and no limit on how many you convert. Because everything runs locally with WebAssembly, your files never touch a server.

HEIC (HEIF) is the format iPhones use to save photos. It’s efficient, but many Windows apps, websites, and older devices can’t open it. AVIF is the newest high-efficiency image format, built on the AV1 codec. It delivers the smallest files at a given quality of any mainstream format.

People usually convert HEIC to AVIF for the smallest possible web images. It’s the go-to fix for iPhone photos that won’t open on Windows or upload to a website. Drop your files below, pick your quality, and download — it takes seconds.

How to convert HEIC to AVIF

Add files

Drop your HEIC file(s) into the box above, or click to browse. Add as many as you like.

Convert

Pick AVIF and adjust quality, then click Convert. It runs instantly on your device.

Download

Download each AVIF, or all of them as a single zip.

Frequently asked questions

Is the HEIC to AVIF converter free?

Yes — it’s completely free with no limits, no watermarks, and no account required. Convert as many HEIC files as you want.

Are my files uploaded to a server?

No. Conversion happens entirely inside your browser using WebAssembly, so your HEIC files never leave your device. Nothing is uploaded, stored, or seen by anyone.

Can I convert multiple HEIC files at once?

Yes. Add as many files as you like and convert them in one batch, then download them together as a zip.

Why won’t my iPhone HEIC photos open on Windows?

HEIC is Apple’s format and isn’t natively supported by many Windows apps or websites. Converting to AVIF makes your photos open anywhere.

Why convert to AVIF?

AVIF produces significantly smaller files than JPG or PNG at the same visual quality, which makes web pages load faster.

Does it work on my phone?

Yes. Convert.diy works in any modern browser on iPhone, Android, Windows, Mac and Linux — no app to install.