ICO VS JP2
The ultimate comparison guide. Understanding the technical differences between Icon File and JPEG 2000.
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
JP2
jp2Wavelet-based successor to JPEG delivering high fidelity for archival and cinema workflows.
Pros
- Lossless or lossy compression
- Supports 12/16-bit color
- Better artifact handling than JPG
Cons
- Slow encoding/decoding
- Limited browser support
- CPU intensive for large frames
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 JP2 wins
Choose JP2 when your workflow prioritizes digital cinema masters or medical imaging. It delivers lossless or lossy compression plus modern compression perks.
Technical Specifications
| Feature | ICO | JP2 |
|---|---|---|
| MIME Type | image/x-icon | image/jp2 |
| Developer | Microsoft | Joint Photographic Experts Group |
| Release Year | 1985 | 2000 |
| Best For | Favicons, Desktop icons | Digital cinema masters, Medical imaging, Long-term archives |
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 JP2 deliverables without leaving their browser.
- • Reference the .ico glossary from this page.
- • Embed the conversion CTA in docs, wikis, and onboarding runbooks.
- • Use JP2 for digital cinema masters 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.