CLASSDIAGRAM file format description

Many people share .classdiagram files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .classdiagram file can be edited, converted or printed with. On this page, we try to provide assistance for handling .classdiagram files.

1 filename extension(s) found in our database.

.cd - Visual Studio Class Diagram

The CD development files are related to Microsoft Visual Studio. The CD file is a Visual Studio Class Diagram. Microsoft Visual Studio is a Integrated Development Environment (IDE) developed by Microsoft to develop GUI (Graphical User Interface), console, Web applications, web apps, mobile apps, cloud, and web services, etc.

Microsoft Visual Studio
Development files
- / -
Visual Studio Class Diagram related extensions:
SF Language Library
Sybase PowerBuilder Query Object
CryENGINE Geometry Format Data
Elixir Interactive Shell Script
Atari Jaguar DSP Assembly Source
Kagi Registration Module Data

Naturally, other applications may also use the .classdiagram file extension. Even harmful programs can create .classdiagram files. Be especially cautious with .classdiagram files coming from an unknown source!

Can't open a .classdiagram file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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