HomeCAD Converter123DX ConverterConvert 123DX to STL

Free Online 123DX to STL Converter

Or drag and drop your files here to upload.
A maximum of 20 files can be uploaded at once.

Please note: Your 123DX file, once uploaded to our server will be deleted 15 minutes after upload so please download your converted 123DX file before this time.

How to Convert your 123DX to STL Online?

Here are 2 simple steps to convert your 123DX to STL using our fast and free 123DX converter tool.

Upload your 123DX file

Click the "Upload a 123DX File" button, then select a 123DX to upload. The maximum file size is 100MB.

Download your STL

Click the download link to receive your STL file.

File format information for 123DX and STL

Full NameAutodesk 123D
Mime Typeapplication/octet-stream

A 123DX file is a specific type of computer file format commonly associated with 3D modeling and design. It is primarily used in the context of 3D printing and rapid prototyping technologies. The "123" in the name refers to its origin from the software company Autodesk, which developed a suite of tools for 3D design and modeling, including Fusion 360. The "DX" stands for "Data Exchange," indicating its purpose as a file format for exchanging 3D design data between different software applications.

123DX files store detailed information about the geometry, topology, and material properties of 3D models. They can include data about the size, shape, and positioning of objects in the virtual space, as well as information on textures, colors, and other visual aspects of the design. This comprehensive data allows 3D printers and other related software to accurately interpret and recreate the model in physical form, layer by layer.

With the rise of 3D printing and its applications in various industries like manufacturing, healthcare, and architecture, the 123DX file format has become increasingly popular due to its versatility and compatibility with multiple design software platforms. Designers, engineers, and enthusiasts can share their creations easily using 123DX files, ensuring that their innovative ideas can be brought to life with precision and accuracy.

Full NameStandard Triangle Language
Type3D Model
Mime Typeapplication/vnd.ms-pki.stl
Opens WithBlender, MeshLab, CAD Assistant, DAZ Studio

An STL file, short for Stereolithography, is a widely used file format in 3D printing and computer-aided design (CAD) applications. It serves as a standard method to represent the surface geometry of a three-dimensional object. The format was first developed by 3D Systems in 1987 and has since become a fundamental file type in the additive manufacturing industry. STL files are essential in the process of converting digital 3D models into physical objects through 3D printing technology.

STL files consist of a collection of triangular facets that approximate the shape of the 3D model. The surface of the object is divided into numerous small triangles, forming a mesh representation. Each triangle is defined by three vertices in 3D space and possesses information about its orientation and size. Since STL files store only the outer surface of the model, they are often referred to as "mesh" files or "surface" files, as they lack information about the object's internal structure or color.

When using STL files for 3D printing, slicing software processes the 3D model by dividing it into layers and creating the instructions for the 3D printer to build the object layer by layer. Despite its simplicity and widespread usage, STL files have some limitations. They do not support color or texture information, and the triangle-based representation can lead to larger file sizes and reduced accuracy compared to other file formats. Nonetheless, STL remains a vital format in the 3D printing ecosystem due to its simplicity and compatibility with a wide range of 3D printers and software.

Frequently Asked Questions

How can I convert my 123DX file to STL?

First click the "Upload..." button, select your 123DX file to upload. Your 123DX file will be uploaded to our servers. When the 123DX to STL conversion has completed, you can download your STL file straight away.

How long does it take to convert my 123DX to STL?

We aim to process all 123DX to STL conversions as quickly as possible, this usually takes around 5 seconds however this can be longer for certain files, so please be patient.

How accurate is the 123DX to STL conversion?

We aim to provide the best conversion experience. Our tools are under constant review and development with new features being added every week.