Extract text from 3D models or emulator movies (CTM)
To convert CTM 3D models to another format, you need OpenCTM or other 3D software.
To convert other file formats to the "3D Mesh Format" file type, you need software like OpenCTM or a similar tool.
The .CTM file format most commonly stores an OpenCTM Compressed Triangle Mesh, a specialized 3D geometry format. It is designed to store complex 3D meshes with very low disk space usage by applying vertex quantization and LZMA compression. Developers use this format for lightweight 3D web applications and game assets. Less frequently, .CTM files function as movie recording files for the Citra 3DS Emulator, map packages for Epic Games Unreal Engine, or model files for Reallusion CrazyTalk.
You can open OpenCTM files using the native OpenCTM viewer or open-source mesh processing tools like MeshLab.
Despite its excellent compression, the OpenCTM format has major limitations. It only stores basic triangle meshes, completely lacking support for complex textures, skeletal animations, or modern PBR materials. Furthermore, many mainstream 3D applications like Blender or Autodesk Maya do not natively support it without third-party plugins. This lack of universal support makes industry collaboration incredibly difficult.
To use the 3D data in standard workflows, you must convert the .CTM file to widely accepted formats like OBJ, STL, or PLY. Converting to OBJ retains basic geometry and UV mapping but increases the file size significantly due to the uncompressed ASCII structure. Converting to STL is ideal for 3D printing, though it discards all color and texture coordinate data.
Converting specialized game or emulator data (like Citra movies or Unreal maps) is extremely difficult because these are closed, proprietary formats. Standard online converters usually fail because they lack the specific engine logic required to parse the binary data. Even if full conversion is blocked by proprietary limits, our tool can extract embedded text or underlying media formats.
Convert.Guru analyzes your CTM file, detects the exact format, and lets you read the text inside.
Users also converted CFM, WME, TJM, X_B, STL and OBJ files.
If you want to convert CTM file to STL, OBJ, FBX, DAE, 3DS, MAX, BLEND, MA, MB, C4D, PLY or WRL, you can use OpenCTM or similar software from the "3D Model Storage" category. In the File menu, look for Save As… or Export….
To convert DWG, DAE, X3D, IGES, WRL, JT, SKP, 3DS, 3DM, OBJ, STEP or FBX files to CTM, try OpenCTM or another comparable tool in the "3D Model Storage" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our CTM converter.