claygroundOBJ to 3MF converter
It runs in your browser. Nothing is uploaded.
OBJ to 3MF
- Kept. shape.
- Dropped. colours and textures.
- Size. Written in the unit you pick, millimetres for printing.
- Up axis. 3MF stands on Z. The page turns the model for you.
The two types
- OBJ. OBJ is a plain-text shape format. It holds the surface and its UV coordinates, with materials in a separate .mtl file, and no bones or animation. Opened by Blender, Maya, 3ds Max, MeshLab, ZBrush, Windows 3D Viewer and almost every other 3D program.
- 3MF. 3MF is a zip of XML made for 3D printing. It names its units and can hold several objects and colours, which STL can’t. Opened by Cura, PrusaSlicer, Bambu Studio, Orca Slicer, Fusion 360 and Windows 3D Builder.
Questions
How do I convert OBJ to 3MF?
Drop the OBJ file and its picture files on this page, check the size under What’s inside, and press Download 3MF. It runs in your browser, so there is no upload and no wait.
What does OBJ to 3MF keep?
3MF keeps the shape. It has no place for colours and textures, so those are dropped.
What size will the 3MF be?
3MF names its unit, and the page writes millimetres, which slicers expect. If the size looks off, change File is in and Write as under What’s inside.
Why does my 3MF lie on its side in the slicer?
OBJ stands on its Y axis and slicers use Z. The Z up box, on by default, turns the model so it sits flat on the plate. Untick it for a program that expects Y up.
My OBJ has textures. Do I drop them too?
Drop the .mtl file and the picture files together with the .obj. Names are matched whatever folder they came from.
Will the 3MF print?
What’s inside says whether the surface is closed, which slicers need. If it is open, repair it in your slicer, Meshmixer or Blender first.
Is my file uploaded?
No. The file is opened and converted in your browser, and it stays on your device.
Is it free?
Yes. There is no account, no watermark and no limit on files.