CD1 file format description

Many people often share .cd1 files without providing instructions on how to use them. This can make it difficult for users to determine which program is compatible for editing, converting, or printing .cd1 files. To address this issue, we have created this page to offer assistance and guidance on handling .cd1 files. We provide information on compatible software, editing instructions and conversion options to help users effectively interact with .cd1 files.

Our aim is to simplify the process and promote seamless use of the .cd1 file format.

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.

Category:Data files
Magic:- / -

DATAIR Cafeteria Document System Data related extensions:

  • ca DATAIR FlexPlus Data
  • cd2 DATAIR Cafeteria Document System Custom Data
  • dis DATAIR Data Import Specification Layout
  • fa2 DATAIR FAS 87/132 Reporter Custom Data
  • pnd DATAIR Pension System Pending Data
  • rd1 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.

Application:Nightlong: Union City Conspiracy
Category:Game Data files
Magic:- / -

Nightlong: Union City Conspiracy Game Data related extensions:

  • uasset Unreal Asset Data
  • itr Icy Tower Replay
  • fsm FreeSpace Saved Mission
  • ddj SilkRoad Online Image
  • mlx Starcraft Saved Game
  • cmg NBA 2K12 Saved Game

Be careful.

It is important to understand that the .cd1 file extension is not limited to a particular set of applications. Other programs besides the intended ones can also use the .cd1 extension to create files. This includes potentially harmful programs or malware that may generate .cd1 files for various purposes. Be especially cautious with .cd1 files coming from untrusted or unknown sources.

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 an extension, you receive the following message:

Select an app to open this .cd1 file

To set the .cd1 file association in Windows 11, you can follow these steps

  1. Open the Settings app by clicking on the Start menu and selecting the gear icon.
  2. In the Settings app, click on System and then select Apps from the left-hand side menu.
  3. Scroll down and click on the Default apps option.
  4. Under the Default apps section, you will find various categories such as Email, Web browser, and Music player.
  5. Locate the category that matches the file type you want to associate, such as Photos for image files or Video player for video files.
  6. Click on the current default app listed under the category. A list of available apps will appear.
  7. Choose the app you want to set as the default for that file type. If the desired app is not listed, click on More apps to see additional options or click on Look for an app in the Microsoft Store to search for apps in the Store.
  8. After selecting the app, it will become the default choice for opening files of that type.

It's worth mentioning that you don't always need to set .cd1 file association. Many applications can open .cd1 files without requiring any specific file association to be set.

The .cd1 file extension is often given incorrectly

Based on searches conducted on our site in the past year, we have compiled a list of the most common misspellings. These frequent misspellings can cause confusion and hinder search accuracy. Our goal in providing this list is to help users find the right information more easily and enhance their overall search experience on our website.

These misspellings were the most common in the past year:

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

Is it possible that the filename extension is misspelled?

There is a possibility that the .cd1 filename extension is misspelled. To assist users in identifying potential errors, we provide a list of similar file extensions in our database.

Filename extensions similar to .cd1:

Operating systems

At, we strive to provide a seamless user experience by ensuring compatibility with a wide range of operating systems. The following is a comprehensive list of the operating systems currently supported by

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 find the information on this .cd1 page useful, please feel free to link to this page. >> CD1 file