Convert ICO 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.
ICO
Icon — A container format for small icons at multiple sizes, used for favicons and app icons.
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 ICO to AVIF
- 1Upload your ICO file
Click “Choose a file” or drag and drop your ICO 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.
ICO vs AVIF
| ICO | AVIF | |
|---|---|---|
| Full name | Icon | AV1 Image File Format |
| Type | Raster image | Raster image |
| Compression | Lossless | Mixed |
| Best for | website favicons and Windows app icons | the smallest high-quality web images, with a JPEG/WebP fallback |
Frequently asked questions
Does converting ICO to AVIF lose quality?
ICO is lossless and AVIF is compressed, so a small amount of data is discarded. We use a high-quality default, so the AVIF file looks identical to the original to the human eye while being much smaller.
What's the difference between ICO and AVIF?
Icon (ICO) is lossless and best for website favicons and Windows app icons. AV1 Image File Format (AVIF) is mixed and best for the smallest high-quality web images, with a JPEG/WebP fallback. Convert ICO to AVIF when you need a raster image for the smallest high-quality web images.
Is the ICO to AVIF converter free?
Yes — converting ICO 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 ICO 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 ICO 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 ICO 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 ICO files to?
Besides AVIF, you can convert ICO to BMP, GIF, JPG, PDF, PNG, PPM and more — see the full list of ICO conversions below.
Other conversions
Last updated July 2026