Convert AVIF to ICO
Turn AVIF images into ICO icons for favicons and Windows. Everything happens in your browser, so your images never leave your device.
Why convert AVIF to ICO?
AVIF is efficient, but it's new enough that many apps, editors and upload forms can't open it yet. ICO is the format browsers look for at /favicon.ico and the one Windows uses for app and shortcut icons.
Transparency is kept
Both AVIF and ICO support transparency, so transparent areas carry over without a fill colour.
Animated AVIF files
If your AVIF is animated, only the first frame is converted and you get a still ICO. Non-animated AVIF files convert as normal.
Favicons and Windows icons
Browsers still request /favicon.ico from websites, and Windows uses ICO for application and shortcut icons. Icons are square and the ICO format tops out at 256 × 256 pixels, so a square, simple AVIF works best; fine detail disappears at 16 × 16.
AVIF and ICO compared
| Property | AVIF | ICO |
|---|---|---|
| Compression | Lossy or lossless | Lossless |
| Transparency | Yes | Yes |
| Animation | Yes (rarely used) | No |
| Typical file size | Very small | Tiny |
| Best for | Web images where size matters most | Favicons, Windows icons |
| Support | Modern browsers; limited in apps | Browsers (favicons), Windows |
Questions
Can I convert an animated AVIF?
Yes, but only the first frame is kept, so you get a still ICO.
Will converting AVIF to ICO reduce quality?
ICO stores icons losslessly, but the format tops out at 256 × 256 pixels, so start from a square AVIF at that size or below and keep the design simple enough to read at 16 × 16.
Are my AVIF images uploaded anywhere?
No. The conversion runs in your browser, on your own device, so your images are never sent to a server. Once the page and converter have loaded, it keeps working even if your connection drops.