Upgrade OBJ Files to the Modern 3MF Print Format
Convert Wavefront OBJ models to 3MF and unlock color, material, and multi-object support in modern slicers. 3MF is the format Bambu Studio, PrusaSlicer, and Orca Slicer are built around.
Convert Now
Convert OBJ to 3MF
Upload a OBJ file and download the converted 3MF — all processing happens on the server.
Drop your OBJ file here
or click to browse
Accepts .obj files
From Geometry-Only to Full Print Package
OBJ stores mesh geometry and basic material references but lacks native print metadata. 3MF packages geometry, colors, materials, multiple objects, and print settings in a structured archive that modern slicers understand natively.
Convert Now
MTL Color Data Carried Over
OBJ models reference material colors via companion MTL files. The converter reads the MTL definitions and maps them into 3MF material and color elements so your print retains the intended color layout.
Convert Now
Native in Every Modern Slicer
3MF is the preferred format for Bambu Studio, PrusaSlicer, Orca Slicer, Cura, and Microsoft 3D Builder. Importing a 3MF drops your model in with correct scale, orientation, and color without any manual correction.
Convert NowHow to Convert OBJ to 3MF
Upload Your OBJ File
Drag and drop an OBJ file into the upload zone or click to browse. Files up to 100 MB are supported.
Sign In and Convert
Sign in to start the conversion. The server reads the OBJ geometry and any associated MTL colors, then packages them into a valid 3MF archive.
Download the 3MF
Once ready, click Download and open the 3MF in your slicer to review and print.
Deep Dive
OBJ and 3MF: Old Standard vs. Modern Print Format
Why Use It
No Software to Install
The conversion runs on the server. No Blender scripts, no manual 3MF assembly, no local tools required.
Color from MTL Preserved
Material color definitions from the companion MTL file are read and mapped into 3MF color elements for accurate reproduction on color-capable printers.
Modern Slicer Ready
The output 3MF loads directly into Bambu Studio, PrusaSlicer, Orca Slicer, and Cura with correct geometry, scale, and color assignments.
Multi-object Support
OBJ files with multiple named objects are converted into separate 3MF model components, preserving object-level organisation in the slicer.
Who Uses It
Who Converts OBJ to 3MF
Frequently Asked Questions
Does the converter read my OBJ MTL file for colors?
Yes. The converter parses the MTL file referenced in the OBJ and maps material diffuse colors into 3MF color definitions so slicers can display and use them.
Can I convert an OBJ with multiple objects?
Yes. Each named object or group in the OBJ is converted into a separate component in the 3MF, preserving the logical structure of your model.
Which slicers will open the resulting 3MF?
Bambu Studio, PrusaSlicer, Orca Slicer, Cura, and Microsoft 3D Builder all support 3MF natively. Most modern slicers handle 3MF without any plugins.
What is the maximum OBJ file size?
The converter supports OBJ files up to 100 MB. Very large or dense meshes may produce correspondingly large 3MF archives.
Are textures embedded in the 3MF output?
Base material colors from the MTL are included. Full texture image embedding depends on the conversion pipeline; for texture-heavy models, converting to GLB or DAE may be a better choice.
Convert Your OBJ to 3MF Now
Upload your OBJ and get a modern print-ready 3MF in seconds. No install, no manual steps.