Free Online OBJ to CTM Converter

You can use our OBJ to CTM conversion tool to quickly convert your 3D model (with optional texture files) for free. You may upload up to 20 files at one time, and our batch OBJ to CTM converter will process each 3D model and present you with a download link for each file once completed.

Select File(s)

Or drag and drop your files here to upload.
A maximum of 20 files can be uploaded at once.

Please note: Your OBJ file, once uploaded to our server, will be deleted 15 minutes after upload, so please download your converted OBJ file before this time.

Our 3D model OBJ to CTM tool will load your OBJ file and, where supported, attempt to extract all the relevant 3D features, such as geometry, textures, and animations. To access the 3D conversion configuration options, click the button when you have selected your files. The current options support the ability to voxelize your 3D model and more.

How to Convert your OBJ to CTM Online?

Here are two simple steps to convert your OBJ to CTM using our fast and free OBJ converter tool.

Upload your OBJ file

Click the "Upload a OBJ File" button, then select a OBJ to upload. The maximum file size is 100MB.

Download your CTM

Click the download link to receive your CTM file.

Frequently Asked Questions

How can I convert my OBJ file to CTM?

First, click the "Upload..." button and select your OBJ file to upload. Your OBJ file will be uploaded to our servers. When the OBJ to CTM conversion has completed, you can download your CTM file right away.

How long does it take to convert my OBJ to CTM?

We aim to process all OBJ to CTM conversions as quickly as possible; this usually takes around 5 seconds; however, this can be longer for certain files, so please be patient.

How accurate is the OBJ to CTM conversion?

We aim to provide the best conversion experience. Our tools are under constant review and development, with new features being added every week.

How does converting OBJ to CTM work?

In order to successfully convert an OBJ formatted file to the CTM format, our converter tools will perform several initial checks to ensure the file provided is indeed an OBJ file. There are many files out there where the file type extension does not match the data contained within the file. To make things more difficult when working with OBJ files is the fact the OBJ file extension is used for other file formats such as the X-Plane format.

Along with these file type checks, our tools will do additional checks to ensure the file is correctly formatted to match the provided file type. There are many tools out there that do not always create OBJ files to the exact specification.

Take your OBJ file

The Wavefront OBJ file format is a text-based format, meaning its contents are human-readable, making smaller OBJ files easy to edit in simple text editors. Larger 3D models quickly generate large text files making hand-editing them in a text editor unwise. Within this text-based format are the core elements that make up the 3D model, including vertices, faces texture coordinates. To ensure efficient conversions, our tool will check all data that is contained within the OBJ file and remove any information that is duplicated. This not only ensures the conversion completes more quickly, but also the generated CTM file size is smaller.

As the CTM file format does not support material textures, our tool when processing the OBJ file will ignore any texture image files that may be present. It will also ignore any texture coordinate information present in the 3D model data.

Convert the data from OBJ to CTM

Now that the data from the OBJ file has been processed, our tool can apply any conversion specified options, such as enabling Voxel mode, and with these applied, prepare the data to be converted to the final CTM file format. Part of this process ensures checking the capabilities of the CTM format and removing any data that cannot be represented.

Save to the CTM format

At this point, the OBJ to CTM conversion tool will have the 3D model in a state that is ready to be transferred to the CTM format. Our tool creates the CTM file, ensuring all the model data is present and is formatted to match the CTM file specification to ensure the file opens in compatible CTM file editors.

File format information for OBJ and CTM

Extension	OBJ
Full Name	Wavefront
Type	3D Model
Mime Type	text/plain
Format	Text
Opens With	MeshLab, CAD Assistant, DAZ Studio

The OBJ file format is a 3D graphics file format used to define complex 3D models, including geometry, materials, and textures. OBJ files are text files, making them human-readable and easy to modify by hand. The downside to this ease of readability is that the files can become rather large when dealing with large or complex 3D models.

As mentioned, the OBJ format stores not only 3D model geometry but also materials and textures. These materials are usually defined in a separate file with the MTL file extension and specify geometry rendering details such as diffuse and specular color, transparency, and much more.

The OBJ material file can also reference external texture files. These are usually JPEG or PNG files; however, these can be older formats, such as TGA. Where materials are used, the OBJ file will also contain material names preceding the geometry faces they should be applied to. If textures are referenced, the geometry will also contain texture coordinates (UV) for each vertex.

OBJ Converter Capabilities

When converting 3D model or mesh files using our OBJ converter, we will attempt to convert color materials into a suitable format for use in the converted file.

Extension	CTM
Full Name	OpenCTM
Type	3D Model
Mime Type	application/x-ctm
Format	Binary

CTM Converter Capabilities

When converting your OBJ to CTM, our tool will attempt to accurately convert any color or material information.

Information for converting from OBJ to CTM

Your OBJ file will be converted to a CTM file using our unified 3D model and mesh conversion tool. Our OBJ 3D tool performs accurate conversions of 3D elements such as vertices, faces, normals, and relevant material information. As both OBJ and CTM support color material information, our tool will also attempt to convert the color information.