Having problems opening a CTT file?

We have programs that can open or convert your CTT files.

Opening 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 CTT 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.

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About File Extension CTT

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the CTT file format or software that uses files with the CTT suffix, please do get in touch - we would love hearing from you.