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EXR at a glance
EXR
OpenEXR came from film-production needs at ILM and then evolved into an open industry format that spread across rendering, compositing, and broader high-end image pipelines.
CRW at a glance
CRW
Early Canon digital-camera workflows used raw formats like CRW before the later EOS raw families stabilized around CR2 and then CR3.
Format comparison
| Feature | EXR | CRW |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2003 | 2000 |
| Inventor | Industrial Light & Magic | Canon |
| Status | active | proprietary |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
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| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Not supported |
| Camera raw data | Not supported | Supported |
| HDR support | Supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use EXR
- Your source file is already in EXR.
- Preserve source expectations before exporting to CRW.
- EXR is commonly used in image workflows.
When to use CRW
- Your target workflow expects CRW.
- Improve delivery compatibility with CRW.
- CRW is commonly used in image workflows.
FAQs
Why convert EXR to CRW?
Convert to CRW when maintaining compatibility with older Canon raw libraries or recovering historical camera originals.
In most current workflows it is a source to preserve or migrate, not a preferred new output format.
What changes when converting EXR to CRW?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to CRW adds camera raw data. Moving to CRW removes HDR content.
What should I review after converting EXR to CRW?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.