The vengi format is the best supported format. Saving into any other format might lose several details from your scene. This depends on the capabilities of the format and the completness of the implementation for supporting that particular format.
Name
Extension
Loading
Saving
Thumbnails
Palette
Animations
Spec
Ace Of Spades
vxl
X
X
X
X
spec
BinVox
binvox
X
X
X
spec
Build engine
kvx
X
X
X
spec
Chronovox-Studio
csm
X
X
Command and Conquer
vxl/hva
X
X
X
X
X
spec
CubeWorld
cub
X
X
X
X
Goxel
gox
X
X
X
X
MagicaVoxel
vox
X
X
X
X
spec
Minecraft Level
dat
X
X
X
Minecraft Region
mcr
X
X
X
X
spec
Minecraft Schematics
schematic
X
X
X
spec
Minecraft Schematics
schem
X
X
X
spec
Minecraft Schematics
nbt
X
X
X
spec
Minetest
mts
X
X
X
spec
Nick's Voxel Model
nvm
X
X
Qubicle Binary Tree
qbt
X
X
X
X
spec
Qubicle Binary
qb
X
X
X
X
spec
Qubicle Exchange
qef
X
X
X
spec
Qubicle Project
qbcl
X
X
X
X
spec
Sandbox VoxEdit Collection
vxc
X
Sandbox VoxEdit Model
vxm
X
X
X
X
Sandbox VoxEdit Hierarchy
vxr
X
X
X
X
Sandbox VoxEdit Tileset
vxt
X
SLAB6
kv6
X
X
X
X
spec
Sproxel
csv
X
X
X
X
spec
StarMade
sment
X
X
X
spec
Vengi
vengi
X
X
X
X
X
Name
Extension
Loading
Saving
Filmbox
fbx
X
X (ascii)
GL Transmission Format
gltf
X
X
Quake 1/UFO:Alien Invasion
bsp
X
Standard Triangle Language
stl
X
X
Wavefront Object
obj
X
X
Palettes
Name
Extension
Loading
Saving
Portable Network Graphics
png
X
X
Gimp Palette
gpl
X
X
Qubicle Palette
qsm
X
RGB Palette
pal
X
X
CSV Palette
csv
X
X
Images/textures
Name
Extension
Portable Network Graphics
png
JPEG
jpeg, jpg
Targa image file
tga
DDS
dds
PKM
pkm
PVR
pvr
Bitmap
bmp
Photoshop
psd
Graphics Interchange Format
gif
Radiance rgbE
hdr
Softimage PIC
pic
Portable Anymap
pnm