Add file extension

File extension DAT

The most common cause of problems with opening the DAT file is simply the lack of appropriate applications installed on your computer. In this case, it is sufficient to find, download and install an application that supports the DAT file format - this type of programs are available below.

File type Program Data Format
Developer N/A



It should be noted that some coded data from files that your computer does not read can be sometimes previewed in a Notepad. This way, we will read passages of a text or numbers. It is worth checking if this method can also be applied to the DAT files.

What should be done when an application from the list has already been installed?

Often, an installed application should automatically link to a DAT file. If it did not happen, the DAT file can be linked with the newly installed application manually. Simply right-click on the DAT file, then from the available list select "Choose default program". Next, select "Browse" and find the application you selected. These changes have to be confirmed by pressing the "OK" button.

Programs that can open the DAT file

  • Yahoo! Instant MessengerYahoo! Instant Messenger
  • Miranda IMMiranda IM
  • SkypeSkype
  • AOL Instant Messenger (AIM)AOL Instant Messenger (AIM)
  • Inno SetupInno Setup
  • FirefoxFirefox
  • Microsoft WordMicrosoft Word
  • Microsoft WindowsMicrosoft Windows
  • Safari for Microsoft WindowsSafari for Microsoft Windows
  • Pegasus MailPegasus Mail
  • Microsoft Exchange ServerMicrosoft Exchange Server
  • KaZaaKaZaa
  • BitDefenderBitDefender
  • AVG AntivirusAVG Antivirus
  • MapInfoMapInfo
  • XnViewXnView
  • Nero Multimedia SuiteNero Multimedia Suite
  • Corel WordPerfectCorel WordPerfect
  • Corel WordPerfect OfficeCorel WordPerfect Office
  • FileAlyzerFileAlyzer
  • Ontrack EasyRecoveryOntrack EasyRecovery
  • PeachtextPeachtext
  • SmartWareSmartWare
  • Norton SystemWorksNorton SystemWorks
  • AllegroAllegro
  • PSpicePSpice
  • Mini-Flash Programming SoftwareMini-Flash Programming Software
  • Winmail OpenerWinmail Opener
  • ClarionClarion
  • CA Anti-SpywareCA Anti-Spyware
  • LogiKalLogiKal
  • Palm DesktopPalm Desktop
  • 602PC Suite602PC Suite
  • DaqartaDaqarta
  • My Personal ProgrammerMy Personal Programmer
  • BrainVoyager QXBrainVoyager QX
  • SeeYouSeeYou
  • UFOCaptureV2UFOCaptureV2
Mac OS
  • Original programOriginal program
  • Text editorText editor
  • iPhotoiPhoto
  • DataFlexDataFlex
  • Opera MobileOpera Mobile

Why can’t I open the DAT file?

However, problems with the DAT files can also have a different background. Sometimes even the software, installed on your computer, that supports the DAT files does not solve the problem. The reason for the fact that the DAT file can’t be opened and used can also be:

- an incorrect link to the DAT file in the registry entries
- corruption of a DAT file, that you want to open
- infection of a DAT file (viruses)
- insufficient computer hardware resources
- drivers out of date
- accidental deletion of the DAT file from the Windows registry
- incomplete installation of the program that supports a DAT file?

Solving these problems should allow the free opening and working with the DAT files. If the computer still has problems with the files, use the services of an expert who will diagnose a specific cause.

My computer does not show file extensions, what should I do?

In the standard Windows settings, a computer user cannot see the DAT file extension. However, you can successfully change this in the settings. Just go to "Control Panel" and select "Appearance and Personalization". Then, go to the "Folder Options" and open the "View" tab. On the "View" tab, you will find "Hide extensions for known file types" – you should mark this option and confirm by pressing "OK". At this point, the extension of all files, including the DAT files should be displayed after the file name.