Convert ICO to AVIF
Free, fast and secure — convert ICO to AVIF right in your browser.
Shrink your ICO by converting to AVIF
Converting ICO to AVIF trades a little detail for a much smaller file, making AVIF image the practical choice for fast web pages, email and sharing.
How to convert ICO to AVIF
- 1 Drop your ICO file into the converter above.
- 2 It is converted to AVIF automatically — no settings to fiddle with.
- 3 Download your new AVIF file instantly.
ICO vs AVIF
| Feature | ICO | AVIF |
|---|---|---|
| Compression | Lossless | Lossy |
| Transparency | Yes | Yes |
| Animation | No | Yes |
| Type | Raster | Raster |
| MIME type | image/x-icon | image/avif |
| Best for | Website favicons and Windows app icons — usually made from a PNG or SVG. | Cutting-edge web delivery where the smallest possible high-quality image is the goal. |
About the formats
Icon (ICO)
ICO is the Windows icon format, used for app icons and website favicons. A single ICO file can bundle several sizes so the right one is shown at each scale.
Strengths
- The standard for website favicons
- Bundles multiple sizes in one file
- Supports transparency
Limitations
- Tiny dimensions only
- Not for general photos
- Limited editor support
Best for: Website favicons and Windows app icons — usually made from a PNG or SVG.
AVIF image
AVIF is a next-generation format based on the AV1 video codec. It offers excellent compression, wide colour and transparency, often beating WebP and JPG on file size.
Strengths
- Outstanding compression and quality
- Wide colour gamut and HDR
- Transparency and animation support
Limitations
- Not supported by older browsers/apps
- Slower to encode
- Limited editing-software support
Best for: Cutting-edge web delivery where the smallest possible high-quality image is the goal.