Images
What is an EXR file?
Updated Jul 2026
EXR (OpenEXR) is a lossless image format built for visual effects and high dynamic range work. It stores far more brightness and color detail per pixel than a typical photo format, often across several layers in one file. The tradeoff is size: EXR files are large and won't open in an ordinary photo viewer or web browser.
- Extension
- .exr
- Type
- Images
- Typically
- VFX, HDR imaging
- Transparency
- None
Why EXR exists
EXR was developed by Industrial Light & Magic in the late 1990s for the demands of film production, where a single frame might need to hold extreme brightness ranges, from a dim shadow to a blown-out explosion, without losing detail at either end.
It works by storing pixel values as floating point numbers instead of the simple 8-bit values a JPG or PNG uses, so it can represent light far brighter or darker than the human eye normally handles in a photo. A single EXR file can also bundle multiple layers, like separate color, depth, and motion passes from a 3D render, that get combined later during compositing.
Most people run into EXR because a render engine or VFX pipeline produced it, and now they need to turn it into something a browser, a client, or a regular photo app can actually display, usually a PNG, JPG, or TIFF.
The trade-offs
Strengths
- Lossless, so no quality is thrown away between saves
- Holds a much wider brightness and color range than standard photo formats
- Can carry multiple render layers or channels in a single file
- Standard format across most VFX and 3D rendering pipelines
Watch-outs
- Files are large, often much bigger than a JPG or PNG of the same image
- Won't open in normal photo viewers, browsers, or messaging apps
- Requires specialized software built for VFX or compositing work
- Its extra dynamic range and layers are wasted overhead for ordinary photos
A note on privacy
An EXR file doesn't usually carry the kind of personal location data a phone photo does, but it can still embed metadata like render settings, project comments, or color pipeline notes added during production. Uploading a render to a web converter sends that file, and whatever is embedded in it, to someone else's server. Converting it on your own machine keeps the file and its metadata local.
Questions
How do I open an EXR file?
You need software built for VFX or 3D work, such as a compositing or rendering application, since standard photo viewers and web browsers can't display it. To view or share it more widely, convert it to PNG, JPG, or TIFF first.
Is EXR better than JPG or PNG?
For dynamic range and precision, yes: EXR keeps detail across a much wider range of brightness and color. For everyday viewing and sharing, no: JPG and PNG are far smaller and open everywhere without extra software.
Why does my render software save EXR?
Render engines default to EXR because it preserves the full floating point detail of a render, including separate passes like depth or reflections, that would be lost if the render were saved straight to a compressed 8-bit format.
Can I convert EXR without uploading it?
Yes. A desktop app like Morphjet converts EXR files on your own computer, so large renders and any embedded project metadata never leave your machine.
Morphjet opens and converts EXR and 1,800+ other formats, all on your own computer. Launching this July.