123DX to STL Converter

Batch convert 123dx files to stl format online for free

Choose files or drag & drop them here.
Only you have access to your files.
All files will be deleted after one hour.

How to convert 123DX files to STL online?

Step-by-step guide to convert 123dx to stl using AnyConv. It works on PC (Windows, Mac, Linux) and mobile devices (iPhone, Android).

Upload 123DX-file

Drag and drop your 123DX file into the upload area. The maximum file size is 100 MB.

123DX to STL

Click "Convert" to change 123dx to stl. The conversion usually takes a few seconds.

Download your STL

Now you can download the STL file. The download link only works on your device.


  • ❓ How can I convert files from 123DX to STL?
    First you need to add file for conversion: drag and drop your 123DX file or click the "Choose File" button. Then click the "Convert" button. When 123DX to STL conversion is completed, you can download your STL file.
  • ⏱️ How long does it take to convert 123DX to STL?
    Mesh conversion is pretty fast. You can change 123DX to STL in a few seconds.
  • 🛡️ Is it safe to convert 123DX to STL on AnyConv?
    Of course! We delete uploaded files immediately, and converted ones after 1 hour. No one has access to your files. File conversion (including 123DX to STL) is absolutely safe.
  • 💻 Can I convert 123DX to STL on Mac OS or Linux?
    Yes, you can use AnyConv on any operating system that has a web browser. Our 123DX to STL converter works online and does not require software installation.

Information about 123DX and STL file formats

🔸 File format 123DX STL
🔸 Full name 123D Design Model File Stereolithography File Format
🔸 File extension .123dx .stl
🔸 MIME type application/vnd.lotus-1-2-3 model/stl, model/x.stl-ascii, model/x.stl-binary
🔸 Developed by Autodesk Inc. 3D Systems
🔸 Type of format
🔸 Description This is a 132D Design three-dimensional model file with the three-dimensional geometry of the model and materials that specify the model's surface appearance. Connections between parts are automatically assigned in models. This provides the model natural motions when moved. STL is a file format native to the stereolithography CAD software created by 3D Systems. Many other software packages support this file format. It is widely used for rapid prototyping, 3D printing, and computer-aided manufacturing. STL files describe only the surface geometry of a three-dimensional object without representing color, texture, or other common CAD model attributes. The STL format specifies both ASCII and binary representations. Binary files are more common since they are more compact.
🔸 Technical details An STL file describes a raw, unstructured triangulated surface by the unit normal and vertices (ordered by the right-hand rule) of the triangles using a three-dimensional Cartesian coordinate system. All STL coordinates were required to be positive numbers in the original specification, but this restriction is no longer enforced, and negative coordinates are commonly encountered in STL files today. As a result, STL files contain no scale information, and the units are arbitrary.
🔸 File conversion 123DX conversion STL conversion
🔸 Associated programs Autodesk 123D TurboCAD, GOM Inspect, STL Viewer, Geomagic Explorer, Parametric Technology Creo, Dassault Systemes CATIA, KeyCreator, MeshLab, SolidWorks, Pro/Engineer, CloudCompare, Blender, AutoCAD, 3D Studio Max, Autodesk Inventor, Mechanical Desktop
🔸 Wiki https://en.wikipedia.org/wiki/Autodesk_123D https://en.wikipedia.org/wiki/STL_(file_format)