CD1 file extension
The table below provides useful information about the .cd1 file extension. It answers questions such as:
- What is the .cd1 file?
- What program do I need to open a .cd1 file?
- How can the .cd1 file be opened, edited or printed?
- How can I convert .cd1 files to another format?
Table of Contents
We hope you find this page helpful and a valuable resource!
1 extension(s) and 1 alias(es) found in database
✅ DATAIR Cafeteria Document System Data

CD1 file is a DATAIR Cafeteria Document System Data. DATAIR is an employee benefits software company.
✅ Nightlong: Union City Conspiracy Game Data

CD0 file is a Nightlong: Union City Conspiracy Game Data. Nightlong: Union City Conspiracy is a cyberpunk-themed adventure game developed by Trecision.
Other types of files may also use the .cd1 file extension.
🚫 The .cd1 file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .cd1 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 cannot open this file:
example.cd1
To open this file, Windows needs to know what program you want to use to open it...
If you don't know how to set the .cd1 file association, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .cd1 file extension, write to us!