OpenEXR Image (.EXR)
OpenEXR is a high dynamic range raster image format developed by Industrial Light & Magic for use in visual effects and motion picture production. It supports 16-bit and 32-bit floating-point pixels, multiple compression methods, arbitrary image channels, and multi-part files. OpenEXR is the industry standard for storing intermediate and final rendered frames in VFX pipelines.
Advantages of OpenEXR Image
What the EXR format does well, and why you might choose it.
- Industry-standard 16-bit and 32-bit floating-point precision for VFX work
- Supports an arbitrary number of named channels and deep image data
- Multiple lossless and lossy compression options including PIZ and DWAA
Limitations of OpenEXR Image
What the EXRformat doesn't do well, and when to choose another format.
- Large file sizes even with compression, especially for 32-bit data
- Not supported by web browsers or most consumer image viewers
- Complex format specification requires specialized libraries to read and write
What EXR files are used for
- Visual effects compositing and intermediate renders in film production
- 3D rendering output for lighting and shading passes
- HDR image storage for professional color grading and post-production
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The most common formats people convert to EXR, ready to convert in seconds.
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Frequently asked questions about EXR
What is a .EXR file?
OpenEXR is a high dynamic range raster image format developed by Industrial Light & Magic for use in visual effects and motion picture production. It supports 16-bit and 32-bit floating-point pixels, multiple compression methods, arbitrary image channels, and multi-part files. OpenEXR is the industry standard for storing intermediate and final rendered frames in VFX pipelines.
What is the MIME type of EXR?
The official MIME type for EXR files is image/x-exr. This is the value web servers and applications use to identify the format when transferring files.
What category does EXR belong to?
EXR is a Image Converter format. Files in this category share common conversion paths and use cases.
How do I open a .EXR file?
EXR files are typically opened by software that natively supports the OpenEXR Imageformat. If you don't have a compatible application, the most reliable approach is to convert the file to a more universal format using the converters listed above. Most OpenEXR Image files convert to widely-supported alternatives in seconds.
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