What is a 3DMK file?
The core fact is that a .3DMK file is a 123D Make Project File developed by Autodesk. Autodesk 123D Make uses this format to store 3D models that have been sliced into 2D plans. Users cut these 2D layers with a laser cutter, a CNC router, or standard scissors, and then assemble them to build a physical 3D object.
How to open 3DMK files?
The original Autodesk 123D Make software is discontinued. Finding tools to open legacy .3DMK files can be difficult. Some users switch their workflows to newer platforms like MakePrintable or use the Slicer add-in for Fusion 360 to achieve similar 3D slicing results. However, native support for old project files varies across modern software.
Inspecting .3DMK files online
Since the original software is no longer officially supported, viewer.online/3dmk can analyze .3DMK files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Summary
viewer.online/3dmk is useful for identifying, inspecting, and understanding .3DMK files without installing software or dealing with compatibility problems.