How do I convert a 3MF file to OBJ?

Drop the .3mf into the converter above and the .obj downloads in seconds - parsed and rewritten locally in your browser, no account needed.

Why take a print file back into an editor?

The usual cases: you downloaded a model only published as .3mf and want to modify it, kitbash parts of a print project, or reuse print models in renders and games. OBJ opens in effectively every editor.

Do the model's colors survive?

No - the output is a mesh-only OBJ. 3MF color and material data would need an .mtl sidecar plus textures, which a single-file conversion cannot produce. Geometry and scale carry perfectly.

Is my file uploaded anywhere?

No - the ZIP/XML parsing and OBJ writing run entirely in your browser.

Can I edit the result and print it again?

Yes - edit the OBJ in Blender (or anywhere), then convert back with the OBJ to STL or OBJ to 3MF route and reslice. Round-tripping geometry through this fleet is lossless.

What happens to supports and slicer settings in the file?

They are ignored - those are slicer project data, not geometry. Only the actual model meshes are converted (which is what you want in an editor).

Convert 3MF to OBJ - Free Online Converter

Drop a .3mf file below and download it as .obj in seconds. The conversion runs entirely in your browser - no upload, no signup, no watermark. It takes models out of slicer project files and into any 3D editor.

Updated July 2026

Done in seconds

Your 3MF converts to OBJ locally in your browser - no upload queue, no waiting.

Private by design

Your file never leaves your device. Nothing is uploaded, nothing is stored.

Free, no strings

No signup, no watermark, no file limit - convert as many files as you need.

How to convert 3mf to obj

Drop your 3MF file

Drag the .3mf file into the converter above or click to browse. No account and no upload - the file stays on your device.

Conversion runs in your browser

The model is parsed and rewritten locally, in seconds for typical files. Geometry is carried over 1:1 - no remeshing, no quality loss.

Download the OBJ

The .obj download starts from the same spot. Convert as many files as you like - there is no limit or watermark.

3MF and OBJ, explained

.3mf

What is 3MF?

3MF is the modern 3D-printing format designed to fix STL's gaps. A single .3mf file can hold multiple objects with names, colors, materials, real units, and even slicer settings like plate layout - which is why modern slicers such as Bambu Studio and PrusaSlicer use it as their native project format.

Under the hood a 3MF file is a ZIP archive with an XML model inside, so it stays compact while carrying far more information than STL. The catch: plenty of older slicers, CAD importers, mesh repair tools, and model marketplaces still only accept STL - which is exactly when you convert.

Developed by: 3MF Consortium (Microsoft, Autodesk, HP, Ultimaker and others) (2015)
Structure: ZIP archive containing an XML mesh description
Used by: Bambu Studio, PrusaSlicer, OrcaSlicer, Cura, Windows 3D tools

.obj

What is OBJ?

OBJ is the plain-text workhorse of 3D interchange. It stores vertices, faces, UV coordinates, and normals in a human-readable file, with materials referenced from a companion .mtl file. Practically every 3D application of the last 30 years can read it.

Because OBJ splits materials and textures into separate files, a bare .obj carries geometry and UVs but shows up untextured unless the .mtl and texture images travel with it. It has no units, no rigging, and no animation - which keeps it simple and universally compatible.

Developed by: Wavefront Technologies (circa 1990)
Structure: Plain-text geometry, with materials in a separate .mtl file
Used by: Blender, Maya, 3ds Max, ZBrush, game engines, 3D scanners

What survives the 3mf to obj conversion

Format conversion is honest work: some data has nowhere to go in the target format. Here is exactly what carries over.

Triangle geometry

Every triangle of every object in the 3MF is carried over exactly.

Model dimensions

3MF stores millimeters; OBJ is unitless but the numbers copy 1:1, so the scale is preserved for any tool that assumes mm.

Multiple objects

Objects on the plate are written into the OBJ as groups; naming may simplify.

Colors & materials

The output is the mesh-only .obj without an .mtl - 3MF color/material extensions are not carried.

Slicer settings & plate layout metadata

Print profiles and supports are slicer project data with no meaning in OBJ.

When should you convert 3MF to OBJ?

Convert to OBJ when a model is trapped in a slicer project: you downloaded a .3mf (or only saved the project) and need the mesh back in Blender, a sculpting app, or an engine for editing and reuse.

Keep the 3MF for printing - it is the richer print format (colors, settings, multiple named parts). The OBJ is for the editing detour; you can convert back to 3MF or STL afterwards.

And if what you actually need is a new model rather than a new file format: 3D AI Studio's main tool can generate 3D models from photos with AI - with exports to every format on this page.

3MF to OBJ - frequently asked questions

Made with 3D AI Studio

Need a new model to print, not just a new format?

3D AI Studio turns photos into print-ready 3D models. Upload a picture, get a watertight mesh you can slice - 100 free credits per month, no credit card.

Generate a 3D model from a photo

100 free credits / month No credit card Exports GLB, STL, OBJ, FBX, USDZ