3MF → OBJ · local conversion
Choose a .3mf file and download the .obj result without sending your design to a conversion server.
3MF → OBJ
3MF colors, materials and metadata are not part of the OBJ format and are dropped. Multiple bodies are combined into a single mesh; verify scale after import.
3MF stores multiple named objects, each with its own transform. OBJ stores grouped meshes with optional vertex normals and UVs. This converter keeps the usable geometry and writes it as a standard OBJ file.
Drop a .3mf file into the converter and wait for the local download. Open the result in Blender, MeshLab, ZBrush, Cinema 4D and most CAD viewers, then confirm its dimensions and orientation before going further.
Drag a .3mf file into the converter above, or click to browse. The file stays on your machine — the browser reads it directly and nothing is uploaded to a server. Files up to 50 MB are supported.
Conversion runs inside a Web Worker so the page stays responsive. The converter reads multiple named objects, each with its own transform, then flattens every visible mesh into OBJ output. Larger models take longer to parse; meshes with several hundred thousand triangles usually finish in a few seconds.
When conversion finishes, the download starts locally. The output keeps the original filename with a .obj extension. There is no account step, no queue and no watermark.
Open the result in Blender, MeshLab, ZBrush, Cinema 4D and most CAD viewers. Confirm dimensions and orientation before applying print or render settings. Because 3MF carries unit metadata and OBJ does not, the scale check matters here.
| 3MF | OBJ | |
|---|---|---|
| Full name | 3D Manufacturing Format | Wavefront OBJ |
| File structure | ZIP archive holding XML part descriptions | plain-text file listing vertices and faces |
| Geometry model | multiple named objects, each with its own transform | grouped meshes with optional vertex normals and UVs |
| Stores color & materials | Yes | No |
| Carries unit metadata | Yes | No |
| Typically comes from | PrusaSlicer, Bambu Studio, Orca Slicer, Fusion 360 and Microsoft 3D Builder | a widely readable text interchange format |
The usual situation: you have a .3mf file from a slicer project or CAD export, but the tool you need to use next only reads OBJ. PrusaSlicer, Bambu Studio, Orca Slicer, Fusion 360 and Microsoft 3D Builder all export 3MF, while Blender, MeshLab, ZBrush, Cinema 4D and most CAD viewers typically expect .obj. OBJ is plain text and readable by almost any 3D application, which makes it a dependable interchange and archival format.
3MF stores multiple named objects, each with its own transform; OBJ stores grouped meshes with optional vertex normals and UVs. Color, materials and textures do not survive the conversion — that is a property of the OBJ format itself, not a limitation of this converter. 3MF records units explicitly and OBJ does not, so you confirm dimensions after import. The geometry itself — triangle faces and vertex positions — is preserved in full, and that is what printing and downstream modeling actually depend on.
The model is tens or hundreds of times too large or small. Units did not line up; rescale in millimeters inside your target application. The output is empty or partial. The source may keep geometry on hidden nodes — unhide them and re-export from the original tool. Surfaces render black or inside-out. The converter recomputes normals for meshes that lack them, but faces that were already inverted in the source need fixing in Blender, MeshLab, ZBrush, Cinema 4D and most CAD viewers. The file will not open. Check that the extension matches the real format; a fresh export from the source application usually resolves it.
Most online converters upload your file to a server, convert it there and send the result back. For unreleased product designs, client models or anything under NDA, that upload is the moment the file leaves your control. This converter runs three.js loaders and exporters locally in your browser, so the file never crosses the network — the page will even convert with your connection turned off.
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