How to open CTT files
Did your computer fail to open a CTT file? We explain what CTT files are and recommend software that we know can open or convert your files.
What is a CTT file?
Files that contain the .ctt file extension are used by the Microsoft Windows Live Messenger instant messaging software application. Windows Messenger is a free instant message application that is distributed by the Microsoft Corporation.
The CTT files that are used by the Windows Messenger IM application store a user's contact information in the XML file format. CTT files contain information such as the names and email addresses of a user's list of contacts. These files can be imported by another use to share contact lists and contact information. CTT files can also be helpful if a user loses his or her contact information, providing a backup resource of the user's contact files.
Software that will open, convert or fix CTT files
These apps are known to open certain types of CTT files. Since many different programs may use CTT files for different purposes, you may need to try a few of the apps to open your specific CTT file.