What is a CD file?
A .CD file is primarily a Visual Studio Class Diagram created by Microsoft. Software developers use these files to map the structure of object-oriented code. A .CD file can also be a character data file used by Traveller's Tales for LEGO video games like Lego Racers and Lego Dimensions. Sometimes, it is a game installation data archive for the Electronic Arts Origin platform or an older CD-i OptImage format by Philips.
How to open CD files?
If your file is a class diagram, you can open it with Microsoft Visual Studio or diagram software like StarUML. If it is a game data file, the corresponding game engine reads the file automatically. Because a .CD file has multiple possible meanings, we recommend using a tool to identify the actual format of your file. viewer.online/cd analyzes .CD files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Best practices and troubleshooting
Do not change the file extension to force a program to open it. If you do not know what kind of .CD file you have, do not download random software. Instead, inspect the file contents first to confirm if it contains code, game characters, or installation data.
Summary
Because .CD files use the known UTF-8 format, viewer.online/cd can safely open and display them online, eliminating compatibility problems.