How to view a .3DM file online
Three steps, no software to install.
Choose your file
Drag your .3DM file onto the box above. If it comes with companion files like .mtl, .bin or textures, drop them together with it.
It opens right away
Your .3DM file is opened and shown in 3D.
Inspect and measure
Rotate, switch views, toggle wireframe and check size, area and volume before printing.
What is a .3DM file?
Meshes, scenes and what "watertight" means for 3D printing.
A .3dm file is a 3D model created in Rhinoceros (Rhino) by Robert McNeel & Associates. It stores precise NURBS surfaces used in product design, architecture and jewelry CAD. To open it free, use an online 3DM viewer or import it into Autodesk Fusion. To 3D-print it or move it to another CAD tool, export to STL or STEP from Rhino.
Programs that open .3DM files
| Full name | Rhino 3D Model (openNURBS) |
|---|---|
| Developer | Robert McNeel & Associates |
| First released | 1990s (Rhinoceros); openNURBS file toolkit released publicly to let any app read/write .3dm |
| Category | 3D & CAD |
| MIME type | model/vnd.rhino.3dm |
| Signature | 33 44 47 65 6F 6D 65 74 72 79 "3D Geometry" - 3DM files begin with the text "3D Geometry File Format" |
Related viewers
Other free tools for engineering and visual files.
Is my .3DM file uploaded to your server?
No. Your .3DM file is rendered with WebGL.
Why is my OBJ model grey or missing textures?
OBJ keeps materials in a separate .mtl file and textures as images. Select or drop all of them together with the .obj and the viewer will link them up automatically.
How accurate are the volume and weight?
For watertight meshes the volume is exact for the triangles in the file. The weight assumes PLA at 1.24 g/cm³ and 100% infill, so a sliced print with lower infill will weigh less.
My model looks lying on its side. What now?
CAD and 3D-printing files usually treat Z as "up", while games and glTF use Y. Switch Up: Y / Z in the toolbar.
Can I open STEP or IGES files here?
Those are CAD formats that store exact surfaces rather than triangles. Open them in our CAD Viewer, which converts them to a mesh.
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