00mesh

3MF

3D Manufacturing Format

3MF is the modern replacement for STL: a ZIP of XML that carries units, colour, materials, multiple objects and print metadata in one file. PrusaSlicer, Bambu Studio, Cura and Windows 3D Builder all use it as their native save format.

Extension: .3mf
MIME type: model/3mf

01 Convert 3MF to something else

3MF to STL Reads the units the 3MF declares and scales accordingly.
3MF to OBJ Each 3MF object becomes a named OBJ group.

02 Convert something else to 3MF

STL to 3MF Records the units STL never could.
OBJ to 3MF Keeps your groups as separate printable objects.

03 Related formats

STL
OBJ
PLY
glTF
GLB

Opening a .3mf file

If you landed here because something handed you a .3mf file and nothing on your machine will open it, converting it to a format you already have a reader for is usually faster than installing new software. Every conversion above runs in this browser — the file is not uploaded, so it works on a locked-down work machine and on a file you are not allowed to send anywhere.