Why convert HEIC to AVIF
- Publishing iPhone photos on a site that serves AVIF.
- Storing an iPhone library as compactly as possible on Android.
How to convert HEIC to AVIF in ConvertX
- 1
Open Image Converter
On the Home screen tap Image Converter.
- 2
Select your HEIC files
Tap "Select image files" and pick the HEIC images (.heic, .heif). On desktop you can also drag them in from Explorer or Finder.
- 3
Choose AVIF as the target
In the output format list choose AVIF.
- 4
Optional settings
Add a rename pattern (use {name} for the original file name), turn on "Keep photo details" if you want camera and location data copied into JPG, PNG or WebP output, and pick an output folder (Android default: Pictures/ConvertX).
- 5
Start the batch
Tap "Convert N images". The Queue opens and processes them in order; you can stop one file or the whole batch.
- 6
Find the results
When the batch finishes, the summary shows the files converted and the space saved. Tap View Library to browse them, or find them in the output folder.
What to know before you convert
- Android 9 or later only; desktop builds don't open HEIC.
- AVIF encoding is slow; let the queue run with the screen off.
- ConvertX cannot read AVIF back, and AVIF output carries no EXIF. Keep the HEIC or make a JPG copy for editing.
HEIC vs AVIF: what changes
| HEIC | AVIF | |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | No | Yes |
| Animation | No | No |
| Keeps EXIF in ConvertX | No | No |
| ConvertX reads it | Yes (Android 9+) | No |
| ConvertX writes it | No | Yes |
| Extensions | .heic, .heif | .avif |
HEIC: Apple's default photo format since 2017. Half the size of JPG, opens in few places outside Apple. AVIF: The newest format, smallest files, still not opened by everything. ConvertX writes it but cannot read it.
Nothing is uploaded
ConvertX converts on the device. There is no server, no account and no file size or count limit beyond your storage. Location and camera details are removed from every output unless you turn on "Keep photo details" (AVIF output never carries them in ConvertX).
Frequently asked questions
Is AVIF smaller than HEIC?
Similar at the same quality; AVIF's advantage is browser support, not size.
Why not just use HEIC on the web?
No browser displays HEIC. AVIF or WebP is required.
Related
- About HEICApple's default photo format since 2017. Half the size of JPG, opens in few places outside Apple.
- About AVIFThe newest format, smallest files, still not opened by everything. ConvertX writes it but cannot read it.
- HEIC to WebPConvert HEIC to WebP on Android, offline
- HEIC to JPGConvert HEIC to JPG on Android, offline
- JPG to AVIFConvert JPG to AVIF offline, in bulk
- Compress HEICCompress HEIC photos on Android, offline
Ready? Download ConvertX: free, with no ads, on Android and desktop.