Free 3DS (.3ds) to 3MF (.3mf) converter — running entirely in your browser. No upload, no signup, no file limits: your files never leave your device.
STEP · IGES · BREP · STL · OBJ · PLY · GLB · glTF · 3MF · COLLADA · AMF · FBX · 3DS · OFF · LAS · PCD · XYZ · PTS
The .3ds format comes from Autodesk 3D Studio for DOS and is one of the oldest mesh formats still in circulation. Despite hard limits — 16-bit vertex counts, 8.3 material names — enormous archives of legacy models exist in .3ds, so being able to read it still matters.
3MF is the modern replacement for STL, backed by the 3MF Consortium (Microsoft, HP, Autodesk, Prusa and others). It stores watertight meshes together with units, colors, materials and print settings in one ZIP-based file, and current slicers increasingly prefer it over STL.
| 3DS | 3MF | |
|---|---|---|
| Geometry | Polygon mesh | Watertight triangle mesh |
| Units | No | Yes, required by spec |
| Colors & materials | Basic materials | Colors & materials |
| Animations | Limited | No |
| Typical use | Legacy model archives | Modern 3D printing |
Yes — free with no accounts, no watermarks and no file-size limits. Conversion runs on your own machine, so there are no server costs behind it.
No. The converter runs entirely in your browser using WebAssembly. Your .3ds file never leaves your device, which makes it safe for confidential designs.
Yes — parts and assembly hierarchy are preserved where 3MF supports them, and you can optionally merge everything into a single mesh during conversion.
Yes. Every converted model opens in the built-in 3D viewer with an assembly tree, display modes and section views, so you can inspect the result first.
3DS is reduced to geometry, hierarchy and one flat base color per part before export, so format-specific metadata and animation do not carry through. The 3MF writer keeps model units, part names and one base color per mesh, but it does not write textures, advanced materials or print settings.
Which file format should you actually print from? A practical ranking of STL, OBJ, 3MF and AMF for FDM and resin printing, with free conversion tools.
Most online CAD converters upload your intellectual property to unknown servers. Learn what actually happens to uploaded files and how client-side conversion avoids the risk.