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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.
PAM at a glance
PAM
PBM, PGM, PPM, PNM, and later PAM come from the tool-centric tradition of keeping image interchange formats easy to parse, script, and transform.
Format comparison
| Feature | ICO | PAM |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1985 | 2000 |
| Inventor | Microsoft | Jef Poskanzer / Netpbm lineage |
| Status | active | active |
| 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 ICO
- Your source file is already in ICO.
- Preserve source expectations before exporting to PAM.
- ICO is commonly used in image workflows.
When to use PAM
- Your target workflow expects PAM.
- Improve delivery compatibility with PAM.
- PAM is commonly used in image workflows.
FAQs
Why convert ICO to PAM?
Convert to PAM when using Unix-style image tools or scripted workflows that benefit from a simple, explicit raster container with more flexibility than PBM/PGM/PPM.
It is useful as an intermediate technical format.
What changes when converting ICO to PAM?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting ICO to PAM?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.