ICO VS AVIF
The ultimate comparison guide. Understanding the technical differences between Icon File and AV1 Image File Format.
ICO
icoStandard format used for computer icons and favicons.
Pros
- Contains multiple resolutions
- Standard for Windows/Web icons
Cons
- Limited use case
- Inefficient for general images
AVIF
avifNext-gen compression codec derived from AV1 video, offering the best quality-to-size ratio.
Pros
- Best-in-class compression
- HDR support
- 10-bit color depth
Cons
- Slow encoding speed
- Limited software support outside browsers
When ICO wins
Stay with ICO when you need favicons or desktop icons. Its strengths center on contains multiple resolutions and a feature set native to Microsoft.
When AVIF wins
Choose AVIF when your workflow prioritizes next-gen web delivery or high-quality streaming assets. It delivers best-in-class compression plus modern compression perks.
Technical Specifications
| Feature | ICO | AVIF |
|---|---|---|
| MIME Type | image/x-icon | image/avif |
| Developer | Microsoft | Alliance for Open Media |
| Release Year | 1985 | 2019 |
| Best For | Favicons, Desktop icons | Next-gen web delivery, High-quality streaming assets |
Need to switch?
Where ICO still wins
Keep ICO when you need contains multiple resolutions and workflows depend on favicons / desktop icons. Link those teams directly to the converter above so they can ship AVIF deliverables without leaving their browser.
- • Reference the .ico glossary from this page.
- • Embed the conversion CTA in docs, wikis, and onboarding runbooks.
- • Use AVIF for next-gen web delivery while archiving originals as ICO.
Keep crawlers in the conversion hub
Link this comparison to the relevant tool, glossary, and documentation pages so every crawl discovers a monetizable route.