CTM to STL Converter

Select files for conversion or just drag and drop them to the upload area

How to convert CTM files to STL online?

Step 1.

Upload CTM-file

Click "Choose File" button to select a ctm file on your computer. CTM file size can be up to 50 Mb.
Step 2.

Convert CTM to STL

Click "Convert" button to start conversion.
Step 3.

Download your STL

When the conversion process is complete, you can download the STL file.

Information about CTM and STL file formats

Full name OpenCTM Data File Stereolithography File Format
File extension .ctm .stl
MIME type
Developed by Marcus Geelnard 3D Systems
Type of format
Description OpenCTM is a 3D geometry technology for storing triangle-based meshes in a compact format. OpenCTM is an open source project that has evolved around a technology for compressing 3D triangle meshes. OpenCTM uses a triangle index array to represent the triangle connectivity information, and several arrays for representing vertex data (vertex coordinates, normals, UV coordinates and custom vertex attributes). STL is a file format native to the stereolithography CAD software created by 3D Systems. This file format is supported by many other software packages. 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 any representation of 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. In the original specification, all STL coordinates were required to be positive numbers, but this restriction is no longer enforced and negative coordinates are commonly encountered in STL files today. STL files contain no scale information, and the units are arbitrary.
File conversion CTM conversion STL conversion
Associated programs OpenCTM 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/OpenCTM https://en.wikipedia.org/wiki/STL_(file_format)
CTM to STL conversion quality rating:
4.7 (812 votes)
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