You're here because you have a file that has a file extension ending in .ctm. Files with the file extension .ctm can only be launched by certain applications. It's possible that .ctm files are data files rather than documents or media, which means they're not meant to be viewed at all.

Files stored and encoded with CTM format specifications are classified as data files used by the CrazyTalk software. These CTM files are appended with the .ctm extension and are also called CrazyTalk model files. The CrazyTalk application can be used to create, open and modify the data stored in these CTM files. Reallusion developed the CTM file format and the CrazyTalk program, which is an application that can be used to convert images into digital animated characters with audio. These are also known as digital animated talking characters. Settings configured by the author of a CTM project store this data in a CTM file and are mainly used by the CrazyTalk software for rigging functionalities, and base and background graphics are also entered by the CTM project author in the associated CTM files using the CrazyTalk software. Rigging functionalities implemented into a CTM project output file consist of facial feature locations, which can be implemented to develop talking faces of the animated characters. Microsoft Windows users can install version 6 of CrazyTalk and Live Cam Avatar Creator, both of which were developed by Reallusion, to start creating talking animated character projects and opening or editing the content of existing CTM files.

Launch a .ctm file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .ctm file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .ctm files aren't yet associated with it. In this case, when you try to open a .ctm file, you can tell Windows which application is the correct one for that file. From then on, opening a  .ctm file will open the correct application. Click here to fix .ctm file association errors

Be careful not to rename the extension on .ctm files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

A file extension is the set of three or four characters at the end of a filename; in this case, .ctm. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.