This is a little windows command line tool to convert .exr files to .jxr files, while preserving the full color information. The output will have the same components and bit depth as the input:
If the input .exr has some unsupported format, an error will be displayed and no output will be generated.
From the command line where the exe is accessibale, you can:
./ExrToJxr.exe "input.exr" "output.jxr"
The output.jxr will have the same components and bit depth as the input.exr.
You can download the latest and other builds as .zip from:
https://github.com/YoanWithY/ExrToJxr/releases