ICO to AVIF — Free Online Image Converter
Convert ICO to AVIF online for free. Private, client-side — no upload required. Fast batch converter.
About ICO to AVIF
Convert ICO to AVIF. ICO bundles multiple resolutions of an icon in one container file. AVIF encodes stills and sequences with the AV1 codec for compact files. Older viewers may not open it; keep a JPEG or PNG copy for sharing..
Why convert ICO to AVIF?
- Flexible size with AVIF lossy or lossless compression - lossy for smaller files, lossless for exact quality.
- Keep animation and transparency where supported.
- Free, private, no upload - runs in your browser.
ICO vs AVIF
| Animation | No | Yes |
|---|---|---|
| Transparency | Yes | Yes |
| Compression | lossless | lossy or lossless |
| Typical use | ICO bundles multiple resolutions of an icon in one container file. | AVIF encodes stills and sequences with the AV1 codec for compact files. |
When not to convert ICO to AVIF
- Skip AVIF for archival masters: lossy compression discards detail, so keep the ICO original.
- No motion to preserve: ICO is a still, so pick AVIF for size or compatibility rather than animation.
Limits
Starting point: ICO - ICO bundles multiple resolutions of an icon in one container file. Conversion rasterizes one size, so start from the largest entry. Older viewers may not open it; keep a JPEG or PNG copy for sharing. Set the quality slider near 80-90 for AVIF photos from ICO, and keep dimensions matched to the source.
How conversion works
Conversion runs entirely in your browser with the WASM image engine. Files never leave your device.