HEIC to AVIF Converter
Convert HEIC — the format iPhones save photos in — into AVIF, a modern format with very small file sizes. Runs entirely in your browser.
Why convert HEIC to AVIF?
AVIF is what HEIC would be if it were royalty-free: the same container family and comparable compression, but built on AV1 and supported directly by Chrome, Firefox, Edge and Safari. Converting here keeps HEIC-class file sizes for a photo you intend to put on the web, where a .heic would simply not display.
What changes when HEIC becomes AVIF
AVIF is encoded at quality 55 with a low effort setting, which is what keeps this bearable in a browser — AV1 encoding is genuinely slow, and a large photo can take several seconds. The result is usually the smallest file anything on this site will produce. Metadata does not carry across, since the HEIC is decoded to raw pixels first.
Why this one is different
Every other HEIC to AVIF converter uploads your files to their server, which is why they cap file sizes and ask you to sign up. This one does the work on your own machine, so it can afford not to.
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Questions
How do I convert HEIC to AVIF?
Drop your HEIC files onto the box above and each one is converted to AVIF straight away. Then download the results, individually or together as a ZIP. There is no upload step and no account.
Why does this one take so long?
AV1 encoding is expensive, and it is running on your own CPU in a browser tab rather than on a server farm. The effort setting is deliberately low to keep it usable; the price is a slightly larger file than a patient encoder would manage.
Is AVIF worth it over WebP?
For photographs, usually — AVIF holds together better at low bitrates. For small images and line art the gap narrows, and WebP encodes many times faster.
Do my files get uploaded anywhere?
No. Everything happens in this tab. Your files are never sent to a server, which is why this still works if you disconnect from the network after the page has loaded.