Home : File Types : DAT File (11 File Associations)

.DAT File Extension

File Type 1Piriform DAT File

DeveloperPiriform
Popularity
4.0 (439 Votes)
CategoryMisc Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

What is a DAT file?

A DAT file is a file used by Piriform applications, such as CCleaner, Speccy, Defraggler, and Recuva. It is a file that acts as a flag, telling a Piriform application to operate in portable mode. Portable mode is useful when users want to run a Piriform application from a USB drive, or when users don't want to leave traces on a computer system.

More Information

To run a Piriform application in portable mode, create a blank file named piriform.dat and save it to the application's installation directory. For example, for CCleaner, the file can be saved to C:\Program Files\CCleaner\. After the file is saved, CCleaner will store program settings in a file named CCleaner.ini, rather than using other storage locations, such as the Windows registry.

NOTE: The contents of the piriform.dat file do not matter. Therefore, an empty file or a non-empty file that contains data will produce the same result.

Common DAT Filenames

portable.dat - The name of the DAT file used by the Piriform application to operate as the portable version.

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Programs that open DAT files
Windows
Piriform CCleaner 5
Piriform Recuva 1
Piriform Defraggler 2
Piriform Speccy 1
Updated 1/11/2017

File Type 2Data File

DeveloperN/A
Popularity
4.0 (71 Votes)
CategoryData Files
FormatText and Binary

Text and Binary

This file is saved in a plain text format or a binary format. If in a plain text format, it can be viewed with a text editor.

.DAT File Association 2

A DAT file is a generic data file created by a specific application. It may contain data in text or binary format, and text-based DAT files can be viewed in a text editor. DAT files are typically accessed only by the application that created them.

More Information

Many programs create, open, or reference DAT files. Additionally, many DAT files are only used for application support and are not meant to be opened manually by the user.

Programs that open DAT files
Windows
Original program that created the file
Any text editor
Mac
Original program that created the file
Any text editor
Updated 7/20/2016

File Type 3Minecraft Data File

DeveloperMojang Specifications
Popularity
4.0 (187 Votes)
CategoryGame Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.DAT File Association 3

A DAT file is a data file used by Minecraft, a 3D exploration and construction game. It is saved in a compressed Gzip format and may save various kinds of data, including player inventory, player position, and world information. DAT files are used for saving world state information as well as for tracking player progress.

More Information

DAT files were also used for storing level "chunks," which are small map pieces that are loaded on demand as a player navigates through the world. This format was introduced beginning with the Minecraft Infdev version, and the chunks used a 16 x 16 x 128 map dimension. Beginning with the Minecraft version 1.3 beta release, a new format called "Region" was introduced, which stores chunks with the .MCR extension. Subsequently, the .MCA format, called "Anvil," was introduced with patch 1.2.1.

Minecraft DAT files have used different formats over incremental releases of the game. Therefore, one DAT file from one version of the game may not be compatible with another version.

NOTE: Minecraft is a first-person perspective game where players construct and destroy blocks and avoid monsters in a 3D environment. Minecraft server is a Java program that runs as a command-line interface.

Common DAT Filenames

level.dat - The Minecraft data file storing world information such as the player, the level generator used, and the time of day.

Programs that open DAT files
Windows
Mojang Minecraft
NBTExplorer
INVedit
MCPlayerEdit
Mac
Mojang Minecraft
NBTExplorer
MCPlayerEdit
Linux
Mojang Minecraft
NBTExplorer
Updated 9/27/2016

File Type 4Windows Registry Hive File

DeveloperMicrosoft
Popularity
3.9 (155 Votes)
CategorySystem Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.DAT File Association 4

File used by the Microsoft Windows registry component; contains data for the system or user-level registry, such as passwords, account settings, or file associations; can be loaded into specific parts of the registry when a user logs into Windows.

More Information

A common registry hive file is NTUSER.DAT, which stores the user-level registry information. It is located in the C:\Users\[user]\ directory. Another common DAT file is SCHEMA.DAT, which is a registry backup and restore file that is located in the C:\Windows\System32\SMI\Store\Machine\ directory.

Programs that open DAT files
Windows
Microsoft Windows
Updated 3/10/2011

File Type 5Exchange E-mail Attachment

DeveloperMicrosoft
Popularity
3.9 (43 Votes)
CategoryMisc Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.DAT File Association 5

Winmail.dat files contain formatting information for Rich Text (RTF) messages sent from Microsoft Exchange Server; they are added to the end of e-mails when a recipient's e-mail client does not support RTF messages; the Winmail.dat file is not useful to users that do not use Outlook or Exchange Server to retrieve their mail.

More Information

Read more about Winmail.dat files, including how to open them and how to prevent them from being sent.

Common DAT Filenames

Winmail.dat - A file attached to the end of email messages when an email program cannot read the rich text formatting data from the source email. This file originates from a Microsoft Exchange Server.

Programs that open DAT files
Windows
File Viewer Plus
Microsoft Windows Mail
Microsoft Outlook 2016
Encryptomatic Message Viewer Lite
Traction WinMail Decoder Pro
Winmail.dat Reader
Biblet WMDecode
Mac
Kupon.BG Klammer
iOS
Kupon.BG Klammer 3
Winmail.dat File Viewer Pro
Updated 11/11/2013

File Type 6Inno Setup Uninstaller Data File

DeveloperJordan Russel
Popularity
3.8 (39 Votes)
CategoryMisc Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.DAT File Association 6

File created by Inno Setup, a program used for making Windows program installers and uninstallers; typically named unins000.dat (or a similar name) and is located in the program installation directory; contains data that helps Inno Setup uninstall the program when the user chooses to do so from the Windows Control Panel.

More Information

Inno Setup ".dat" file has a corresponding .EXE file named unins000.exe (or a similar name). When the executable is run, it uses the information in unins000.dat to uninstall the program from the Windows computer.

Programs that open DAT files
Windows
Referenced by Jrsoftware Inno Setup uninstaller
Updated 9/27/2012

File Type 7SimCity 4 Game Data File

DeveloperElectronic Arts
Popularity
3.6 (32 Votes)
CategoryGame Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.DAT File Association 7

Game package file used by SimCity 4, a city building simulation game; may contain several types of game data files, including .SC4MODEL, .SC4LOT, and .SC4DESC files; used for packaging files into usable content for the game.

More Information

SimCity 4 DAT files can be browsed using iLives Reader or DatGen (developed by DarkMatter).

Programs that open DAT files
Windows
Electronic Arts SimCity 4
Electronic Arts Building Architect Tool
iLive Reader
DatGen
Mac
Electronic Arts SimCity 4
Updated 8/12/2015

File Type 8Piriform Key File

DeveloperPiriform
Popularity
3.6 (21 Votes)
CategoryData Files
FormatText

Text

This file is saved in a plain text format. You can open and view the contents of this file using a text editor.

.DAT File Association 8

Key file used by Piriform applications, such as CCleaner and Recuva, that help users manage their PCs; contains the registry key number that is referenced by the application in order to operate in the appropriate mode.

More Information

NOTE: If the file is moved or deleted from its location in the application directory, the application will operate in the trial mode instead of the purchased mode.

Programs that open DAT files
Windows
Piriform CCleaner 5
Piriform Recuva 1
Piriform Defraggler 2
Piriform Speccy 1
Updated 8/19/2014

File Type 9VCD Video File

DeveloperN/A
Popularity
3.5 (53 Votes)
CategoryVideo Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.DAT File Association 9

Video stream from a Video CD (VCD) disc; typically saved in MPEG-1 or MPEG-2 format; contains the actual video data that is played from the VCD.

More Information

NOTE: Video CD players should play the video from the DAT files without having to open the files manually.

Programs that open DAT files
Windows
File Viewer Plus
CyberLink PowerDirector 15 Ultra
CyberLink PowerProducer 6
Nero 2017
GRETECH GOM Player
VideoLAN VLC media player
VCDGear
MPlayer
Mac
Eltima Elmedia Player
VCDGear
VideoLAN VLC media player
MPlayer
Linux
VCDGear
VideoLAN VLC media player
MPlayer
Updated 9/27/2016

File Type 10Nonimmigrant Visa Application Data File

DeveloperU.S. Department of State
Popularity
3.5 (28 Votes)
CategoryData Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.DAT File Association 10

Application form data file created by the U.S. Online Nonimmigrant Visa Application (DS-160) process, which is made available from the U.S. Department of State's Consular Electronic Application Center; created by the online, browser-based application and contains data such as personal background information; used for saving and loading the application through the online form filing process.

Programs that open DAT files
Updated 3/1/2012

File Type 11Porteus Save Container File

DeveloperPorteus Team
Popularity
3.3 (17 Votes)
CategoryData Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

.DAT File Association 11

System save file used by Porteus, a portable Linux operating system (OS); contains saved changes that have been made to the Porteus OS; includes changes to system settings, bookmarks, downloaded files, and browser history.

More Information

The DAT file is used as a container that holds alterations you have made to Porteus, which enables you to keep your OS the same when installing it to other devices. It is a necessary container file if you are installing Porteus to devices formatted with a Windows file system. The file is used to retain data, such as symlinks, and Linux permissions, to run your system properly.

To create a DAT file container to save your customizations, boot Porteus into the KDE, Xfce, or LXDE desktop interfaces. After the boot is complete, open the menu and select System → Porteus save.dat manager. Then follow the prompts to finish creating your DAT file.

Common DAT Filenames

porteussave.dat - Common filename given when saving an OS session.

Programs that open DAT files
Linux
Porteus
Updated 10/23/2014

About the file extension dat

Our goal is to help you understand what a file with a *.dat suffix is and how to open it.

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