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View 3D CTM Files Online

Use this free tool to view your 3D CTM (OpenCTM) files online without needing to install any software. Our CTM viewer tool will generate a real-time 3D preview of your CTM file with Pan and Zoom controls, allowing you to see your 3D model from any angle.

Our CTM viewing tool can load most CTM files, and we are working on improvements all the time to improve compatibility with all file formats. If you are looking to convert your 2D image files to 3D files, such as STL, then we have a 2D to 3D conversion tool here.

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How to View your CTM File Online?

Here are two simple steps to display your CTM file in any web browser.

Upload an CTM

Click the "Upload a File" button and select an CTM to upload. The maximum file size is 100MB.

View your CTM

Once processed, your CTM file will be displayed in the web browser.

File Format Information for CTM

Full NameOpenCTM
Type3D Model
Mime Typeapplication/x-ctm
ToolsCTM Converters, 3D Model Voxelizer, Create CTM Animation, Text to CTM, CTM Viewer


The CTM file format is a 3D triangle mesh format that contains 3D geometry such as vertices, faces, and face normals. The format was devised and released in 2010 with the intention of creating 3D models that could be compressed and easily distributed.

The compression methods employed by the CTM format can be lossy or lossless. The lossy compression will attempt to simplify the mesh vertices to reduce the space needed to store them, while the lossless method employs the LZMA compression library. The format has its own dedicated CTM viewer application, though the format is not well supported by other 3D modeling applications.

CTM Features

  • Mesh Geometry (Vertices and Faces)
  • Vertex Normals
  • Face Normals
  • Vertex Colors
  • Face Materials (Excluding textures)
  • Textures
  • Point Cloud
  • Multiple Objects Per File
  • Object Transforms (Translation, Rotation, and Scale)
  • Bones/Joints
  • Animations
  • Suitable for 3D Printing

Frequently Asked Questions

How can I view my CTM file online?

First, click the "Upload..." button and select the CTM file you wish to view. Once your CTM file has been received it will be displayed in your browser.

How long does it take to view my CTM file?

We aim to process all CTM file viewing requests as quickly as possible, this usually takes around 5 seconds but can be more for larger or more complex files so please be patient.

How accurate is the CTM file viewer?

We aim to create the most accurate rendition of your CTM file with our tools. Our tools are under constant development with new features and improvements being added every week.

Is it safe to view my CTM file on ImageToStl.com?

Yes, of course! We do not store the CTM file you submit. The generated preview file within your browser is deleted after 15 minutes,

Can I view my CTM file on Windows, Linux, Android, iOS or Mac OS?

Yes! Our CTM file viewer will run on any system with a modern web browser. No specialist software is needed to use our file viewing tools.

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