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JPM at a glance
JPM
JPEG 2000 arrived as a major standards effort to improve on classic JPEG, but its practical adoption concentrated in specialist domains rather than in the universal browser-and-camera role held by JPEG.
ICO at a glance
ICO
ICO grew with the Windows desktop experience, where applications needed icons that scaled across shell views, toolbars, shortcuts, and later higher-DPI environments.
Format comparison
| Feature | JPM | ICO |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2000 | 1985 |
| Inventor | Joint Photographic Experts Group | Microsoft |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Supported | Not supported |
| Vector scaling | Supported | Not supported |
| Camera raw data | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use JPM
- Your source file is already in JPM.
- Preserve source expectations before exporting to ICO.
- JPM is commonly used in image workflows.
When to use ICO
- Your target workflow expects ICO.
- Improve delivery compatibility with ICO.
- ICO is commonly used in image workflows.
FAQs
Why convert JPM to ICO?
Convert to ICO when preparing Windows application icons, installer assets, or other desktop-interface graphics that require native icon packaging.
It is useful when multiple icon sizes must travel in a single platform-friendly file.
What changes when converting JPM to ICO?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to ICO removes layer support. Moving to ICO removes vector scaling.
What should I review after converting JPM to ICO?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.