Convert HEIF to AVIF online in seconds — free, with no sign-up. AVIF is mixed and ideal for the smallest high-quality web images, with a JPEG/WebP fallback. Your files are encrypted and deleted automatically after 24 hours.
HEIF
High Efficiency Image Format — A high-efficiency photo container ~2× smaller than JPEG at equal quality.
AVIF
AV1 Image File Format — A next-gen format built on the AV1 codec, 40–60% smaller than JPEG with HDR and transparency.
How to convert HEIF to AVIF
- 1Upload your HEIF file
Click “Choose a file” or drag and drop your HEIF file onto the page — no sign-up or email needed.
- 2Convert to AVIF
AVIF is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your AVIF file
Your AVIF file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
HEIF vs AVIF
| HEIF | AVIF | |
|---|---|---|
| Full name | High Efficiency Image Format | AV1 Image File Format |
| Type | Raster image | Raster image |
| Compression | Lossy | Mixed |
| Best for | compact photo storage; often converted for wider compatibility | the smallest high-quality web images, with a JPEG/WebP fallback |
Frequently asked questions
Does converting HEIF to AVIF lose quality?
Both HEIF and AVIF use compression, so re-encoding discards a little more data. For a single conversion the change is virtually invisible; just avoid repeatedly re-converting the same file.
What's the difference between HEIF and AVIF?
High Efficiency Image Format (HEIF) is lossy and best for compact photo storage; often converted for wider compatibility. AV1 Image File Format (AVIF) is mixed and best for the smallest high-quality web images, with a JPEG/WebP fallback. Convert HEIF to AVIF when you need a raster image for the smallest high-quality web images.
Is the HEIF to AVIF converter free?
Yes — converting HEIF to AVIF is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my HEIF files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert HEIF to AVIF on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert HEIF to AVIF?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert HEIF files to?
Besides AVIF, you can convert HEIF to BMP, GIF, ICO, JPG, PDF, PNG and more — see the full list of HEIF conversions below.
Other conversions
Last updated July 2026