123C Converter

Convert 123C files online for free

Select File
Drop or upload your .123C file

How to convert your 123C file

Click Select File above, and choose your 123C file.
You'll see a preview.
Click the "Convert file to..." button to save your file in the format you want.

Convert 123C to another file type

The converter easily converts your 123C file to various formats—free and online. No AutoCAD or extra software needed.

123C to DWG
123C to DXF
123C to DGN
123C to RVT
123C to RFA
123C to SKP
123C to 3DM
123C to STEP
123C to IGES
123C to SAT
123C to X_T
123C to X_B

Convert a file to 123C

The converter also works in reverse, allowing you to convert your file into the 123C file type—in the best quality.

SLDASM to 123C
DGN to 123C
PRT to 123C
IAM to 123C
X_B to 123C
CATPRODUCT to 123C
SLDPRT to 123C
RVT to 123C
ASM to 123C
DWG to 123C
CATPART to 123C
DXF to 123C

About 123C files

The 123C file format is a proprietary 3D model file type associated with Autodesk's 123D software suite, now discontinued. These files store 3D models and are primarily used by hobbyists and educators for designing and printing 3D objects. Although 123C files were popular during the peak of Autodesk 123D, their use has declined due to the discontinuation of the software.

Converting 123C files can be challenging due to their proprietary nature. However, several desktop software options are available for conversion:

Autodesk Fusion 360: A powerful tool that can import 123C files and export them to more universal formats like .STL, .OBJ, and .STEP.
Tinkercad: Another Autodesk product that allows importing 123C files and exporting to .STL and .OBJ formats.
Blender: Although it does not natively support 123C files, you can use a combination of Fusion 360 exports and Blender imports for further editing.

Important considerations when converting 123C files include potential loss of detail and compatibility issues with non-Autodesk software. The conversion process might also be time-consuming and require technical expertise, making it less accessible for average users.

Given these challenges, using a reliable and easy-to-use online platform like Convert.Guru is recommended. Simply drag and drop your 123C files to the website to convert them into various formats such as .STL, .OBJ, and more, without the hassle of complex software. While Convert.Guru offers a free and user-friendly experience, remember that some online tools may not support 123C files due to their proprietary nature.

The 123C Converter Story

The history of Convert.Guru began more than 25 years ago in California, when Tom Simondi published the most comprehensive database of file formats on his website. Before that, Tom had worked on Space Shuttle development at the Air Force Systems Command’s Space Division in Los Angeles. He is known as one of the top programmers of the late 1980s.

When Microsoft integrated Tom’s Filext database into Windows XP, it became the leading platform for analyzing and processing file types and formats.

Today, we use the latest technologies to analyze, process, and convert one of the world's largest collections of file formats. We are committed to developing the best 123C converter by continuously improving quality, usability, and reliability.