Convert 3DS to 3MF
Free 3DS to 3MF converter that runs in your browser. See real dimensions before you download, and get a watertight, slicer-ready file.
How to convert 3DS to 3MF
- Drop your 3DS file (with its textures, if separate) onto the converter — it opens in your browser, nothing is uploaded.
- Check the preview and the dimensions in mm; fix units or the up axis in “Units & orientation” if the size or orientation looks wrong.
- Choose 3MF as the output and click Convert. Several files download as one ZIP.
What carries over from 3DS to 3MF
| 3DS | 3MF | Result | |
|---|---|---|---|
| Colour / materials | Yes | Yes | Kept |
| Textures | Yes | No | Dropped |
| Units stored in file | No | Yes | Written as mm |
| Separate parts | Yes | Yes | Kept |
| Usual up axis | Z | Z | Unchanged |
About 3DS files
The .3ds format came from 3D Studio for DOS, released by Yost Group in 1990 and later acquired by Autodesk, which turned into 3ds Max. The file is binary and organised as nested chunks, each with an ID and a length, so a reader can skip chunks it does not understand. It stores triangle meshes, materials, lights, cameras and keyframe data. Its age shows in its limits: each mesh can hold at most 65,535 vertices and 65,535 faces because counts are 16-bit, object names are restricted to 8.3-style short names in practice, and texture file names are short as well. It also has no unit field. Despite that, thousands of free models from the 1990s and 2000s were published as 3DS, and many converters, viewers and game tools still read it. Modern 3ds Max saves in its own .max format and exports FBX.
About 3MF files
3MF was designed by the 3MF Consortium, whose members include Microsoft, Autodesk, HP, Stratasys and Prusa, as a modern replacement for STL in additive manufacturing. A .3mf file is a ZIP archive following the Open Packaging Conventions. Inside it, an XML model part holds the mesh, while other parts can hold thumbnails, textures and metadata. Unlike STL, the mesh shares vertices between triangles, which makes files smaller and keeps the surface connected. The core specification defines units, build items with placement transforms, and several objects in one file. Extensions cover materials, slices and beam lattices. Bambu Studio, OrcaSlicer and PrusaSlicer save their projects as 3MF with their own settings stored in extra files, so a project from one slicer may open in another with the geometry intact but the print profile ignored.
3D printing notes
For multi-colour and multi-part prints, 3MF is the format to use. Bambu Studio and OrcaSlicer open each part as a separate object, which lets you assign a different filament or setting to each one, and Prusa-family slicers do the same. Because the unit is stored in the file, a model does not arrive at the wrong size. Be careful with project files: a 3MF saved by Bambu Studio carries printer, plate and process settings that PrusaSlicer will not apply, and some slicers pick a different default when a model has no declared plate. MeshShift writes 3MF with several parts and keeps colours as base materials, and it reads 3MF for viewing, measuring and print checks.
Frequently asked questions
Is this 3DS to 3MF converter free and private?
Yes. The conversion runs in your browser with JavaScript and WebAssembly, so your 3DS file is never uploaded to a server. There is no sign-up, no watermark and no daily limit; very large files are limited only by your device's memory.
Why are 3DS models limited in size?
The format stores vertex and face counts as 16-bit numbers, so a single mesh cannot exceed 65,535 of either. Larger models are split across several meshes. That cap came from the DOS-era software the format was built for.
Is 3MF better than STL for 3D printing?
For most modern slicers, yes. 3MF records units, supports colours and several objects, and compresses well, while STL has none of those. STL remains the safer choice when a tool, a resin printer or a print service only advertises STL support.