Developed by Adobe for After Effects and Premiere Pro, the .cube file format has become the industry standard for 3D LUTs. It is a universal, open standard supported by DaVinci Resolve, Final Cut Pro, Baselight, and most video editing software.
A marketing agency wants the same color grade for their YouTube commercial (edited in Premiere Pro) and their product photos (edited in Lightroom). They build a master LUT in DaVinci Resolve as a .cube file. By converting that Cube to XMP, the photographers can apply the exact same brand colors to still images. cube to xmp converter
Previously used for Pixelmator and older editing suites, this utility allows for easy conversion, though newer tools like "LUT Generator" have largely superseded it. The Ultimate Guide to Cube to XMP Converter: