3DS to STL Converter

Print legacy 3D Studio models: 3DS to STL with all meshes merged into one printable file.

  • Files stay on your device
  • Free, no sign-up
  • Units and up axis handled
  • Batch and .zip

Drop a 3DS file to convert

One file, many, or a .zip

In: STL · STEP · IGES · OBJ · 3MF · GLB · glTF · PLY · FBX · DAE · 3DS · AMF · VRML · ZIP

Converted on your device. Nothing is uploaded.

    How to convert 3DS to STL

    1. Drop your 3DS files

      Drop .3ds files with their texture images.

    2. Check the preview

      The model appears at the size and orientation it will have. Fix the file units, up axis or size under Size, units and orientation if needed.

    3. Choose STL options

      Binary STL by default (smallest, read everywhere). Tick ASCII only if an old tool asks for text STL.

    4. Convert and download

      One file downloads straight away. A batch gives a download per file and one .zip of all of them.

    What carries over from 3DS to STL

    Worked out from what each format can store and what this converter writes. Nothing is changed silently: the preview shows the size and orientation before you download.

    Geometry Every face is kept; quads and n-gons are split into triangles.
    Color Dropped: STL cannot store color.
    Units 3DS has bare numbers, so they pass through as millimetres: 1 unit becomes 1 millimetre. If the preview size is wrong, set the file units.
    Orientation Both are Z up, so it stays the right way up.
    Objects Merged into one surface: STL has no objects.

    3DS to STL: what actually happens

    The 3DS format splits large models into many meshes because of its 65,536-vertex limit. The converter merges them into one STL and keeps 3DS's Z up, which matches the slicer.

    3DS stores no units, so the numbers pass through as millimetres. If the model comes out the wrong size, set the file units or a target height.

    3DS at a glance

    3D Studio mesh · .3ds

    Stores
    Binary chunks: meshes, materials, texture names
    Color
    Materials and textures
    Units
    None stored in the mesh
    Up axis
    Z
    Limits
    65,536 vertices per mesh, 8.3 texture file names
    Opens in
    3ds Max, Blender (add-on), many legacy tools

    3DS is the native format of the DOS-era Autodesk 3D Studio. Its 16-bit limits make it obsolete, but large libraries of older models still ship as .3ds.

    Open 3DS files in the viewer

    STL at a glance

    Stereolithography (Standard Triangle Language) · .stl

    Stores
    Loose triangles: three corners and a normal each, binary or ASCII
    Color
    None in the standard
    Units
    None written; slicers assume millimetres
    Up axis
    Z, the slicer convention
    File size
    50 bytes per triangle in binary, about 5 times that as ASCII
    Opens in
    Every slicer, CAD tool and 3D app

    Created by 3D Systems in 1987 for the first stereolithography printers, STL is still the format every slicer and print service accepts. It describes a surface as a list of independent triangles, with no shared vertices, units, colors or scene structure.

    Open STL files in the viewer

    Tips for 3DS to STL

    Check closure

    Old game and archviz models often aren't watertight. Check before printing.

    Set a size

    Use the height option for a known print size.

    Keep textures

    Convert to GLB instead to keep the textures.

    3DS to STL FAQ

    Why is my 3DS model the wrong size?
    3DS has no units. Set the file units or a target height.

    Are textures kept?
    Not in STL. GLB or OBJ keep them.

    Can I convert many 3DS files?
    Yes, drop them all or a .zip.

    Is the converter free? Are there limits?
    Free, with no sign-up, watermark or file count limit. Batches and files of a few hundred MB work on most laptops; the only limit is your device's memory.

    Are my files uploaded?
    No. Files are read and written by JavaScript and WebAssembly in your browser and never sent to PrintPal. The STEP and IGES reader is the only extra download, once, from a public CDN.