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ICNS at a glance
ICNS
ICNS reflects the Mac graphics-resource tradition where a single icon asset is really a packaged set of representations for one application or object identity.
XPM at a glance
XPM
Before today's relatively small set of mainstream consumer image formats dominated everyday use, desktop software, workstations, GUI systems, and early graphics tools produced many specialized raster formats with local importance.
Format comparison
| Feature | ICNS | XPM |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
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| Created year | 2000 | 1989 |
| Inventor | Apple | Daniel Dardailler, Colas Nahaboo (Groupe Bull) |
| Status | proprietary | legacy |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Not 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 ICNS
- Your source file is already in ICNS.
- Preserve source expectations before exporting to XPM.
- ICNS is commonly used in image workflows.
When to use XPM
- Your target workflow expects XPM.
- Improve delivery compatibility with XPM.
- XPM is commonly used in image workflows.
FAQs
Why convert ICNS to XPM?
Convert to XPM when maintaining or restoring X11-era icon assets or other historical Unix interface graphics.
It is useful where text-based icon compatibility matters more than modern compression.
What changes when converting ICNS to XPM?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting ICNS to XPM?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.