Open 0xr.space, press Open and choose the .vox, then press View in your space on a Meta Quest or an ARCore phone. Each voxel becomes a cube 2 cm across in the file's palette colour, and a scene of several models keeps its layout, rotations included. Only the outside faces are drawn, so a solid model stays light enough for a headset.
A scene over 2 million voxels is refused with a message giving its count. MagicaVoxel's materials are not read: glass, metal and glow all draw as plain palette colour. The 2 cm size is fixed; scale the model by hand if your voxels stand for something larger or smaller.
Each voxel is 2 cm, so a model 64 voxels wide is 1.28 m across. Scale it to fit.
MagicaVoxel's materials are not read. Every voxel is drawn in its palette colour.
Yes, 2 million voxels in the whole scene. Past that the file is refused rather than left to freeze the page.
No. It is read on the device, and nothing is sent to a server unless you create a share link yourself.