CD1 file format description

Many people share .cd1 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cd1 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cd1 files.

2 filename extension(s) found in our database.

.cd1 - DATAIR Cafeteria Document System Data

The CD1 data files are related to DATAIR. The CD1 file is a DATAIR Cafeteria Document System Data. DATAIR is an employee benefits software company.

Data files
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DATAIR Cafeteria Document System Data related extensions:
DATAIR FlexPlus Data
DATAIR Cafeteria Document System Custom Data
DATAIR Data Import Specification Layout
DATAIR FAS 87/132 Reporter Custom Data
DATAIR Pension System Pending Data
DATAIR Retirement Plan Document System Data

.cd0 - Nightlong: Union City Conspiracy Game Data

The CD0 game data files are related to Nightlong: Union City Conspiracy. The CD0 file is a Nightlong: Union City Conspiracy Game Data. Nightlong: Union City Conspiracy is a cyberpunk-themed adventure game developed by Trecision. The Nightlong: Union City Conspiracy seems to be no longer supported.

Nightlong: Union City Conspiracy
Game Data files
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Nightlong: Union City Conspiracy Game Data related extensions:
Line of Sight: Vietnam Game Data
Unreal Asset Data
Icy Tower Replay
FreeSpace Saved Mission
SilkRoad Online Image
Starcraft Saved Game

Naturally, other applications may also use the .cd1 file extension. Even harmful programs can create .cd1 files. Be especially cautious with .cd1 files coming from an unknown source!

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 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.

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:

c1, c1d, cc1, cd, cdl, cdw, ce1, cf1, cr1, cs1, cw1, d1, dc1, fd1, sd1

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Common Data Form Language File
Progress OpenEdge Database
Common Loudspeaker Format Type 1 File
Maxon Cinema 4D Plugin
C1Report C1D Open XML Document
CADKEY CAD Advanced Design Language File

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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If you have useful information about the .cd1 file format, then write to us! >> CD1 file