iPhones save photos as HEIC, which many Windows PCs, websites and upload forms can’t open. Converting to AVIF fixes that: smallest files of any common format.
Drop one HEIC or a hundred — they’re converted inside your browser, so even private photos are never uploaded anywhere.
HEIC vs AVIF
| HEIC | AVIF | |
|---|---|---|
| Compression | Lossy | Lossy or lossless |
| Transparency | Yes | Yes |
| Animation | No | Yes |
| File size | About half the size of JPG | Often 50% smaller than JPG |
| Compatibility | Apple devices; poor support on Windows, Android and the web | Modern browsers (Chrome, Edge, Firefox, Safari 16+); limited in desktop apps |
| Best for | Saving space on iPhones | The smallest possible files for modern websites |
Good to know before converting HEIC to AVIF
- AVIF files are smaller, but double-check that the app or site you’re uploading to accepts AVIF.
- Your iPhone’s photo orientation is applied automatically, so the result is never sideways.
- Hidden data like GPS location and camera details is left out of the converted file.
What is HEIC?
HEIC is the format iPhones use for photos by default. It keeps photos small without losing quality — but outside Apple’s world it’s a headache: Windows, many Android apps, websites and upload forms often can’t open it.
What is AVIF?
AVIF is the newest mainstream image format, based on the AV1 video codec. It squeezes photos dramatically smaller than JPG while keeping them sharp, and supports transparency and HDR. It’s still new, so many apps and websites don’t accept it yet.
How to convert HEIC to AVIF
- Drop your HEIC files (or paste with Ctrl+V).
- AVIF is already selected — adjust quality if you like.
- Download one by one or all as a ZIP.
Frequently asked questions
Does converting HEIC to AVIF reduce quality?
Only very slightly. AVIF is lossy or lossless; at the default quality the difference is practically invisible. Raise the quality slider for maximum fidelity.
Can I convert many HEIC files at once?
Yes — drop as many as you like and download them all as one ZIP.
Are my images uploaded to a server?
No. Everything happens inside your browser on your own device. Your images are never uploaded, stored or seen by anyone — check your browser's Network tab, or turn on airplane mode after the page loads and see that it still works.
Is it really free?
Yes. No sign-up, no watermark, no daily limits and no paid “HD” downloads.
Do downloads still contain my location?
No. Every file you download is saved without hidden metadata like GPS location, camera serial number or owner name.