.123C File Extension
What is a 123C file?
CAD model created by 123D, a free 3D CAD drawing program developed by Autodesk; can include multiple parts that make up the overall model; used for drafting and prototyping mesh models, props, and scenery.
123C files are similar to the .123D format, which is the default format used by Autodesk 123D. Both file types are similar to .DWG files and can be published to the DWG format.
NOTE: Many free 123C models are provided for download at the 123D website.
Programs that open 123C files