.dat

File Type 1 Generic IconData File
File Format Standard
Usage Runs when opened
Rank ★ ★ ★  Common
Description

A DAT file is a generic data file. It contains data that may be opened or referenced by a specific application. While some DAT files can be opened directly, most contain program data that is referenced the program when it is running. Therefore, most DAT files are not meant to be opened manually.

Since ".dat" is a generic extension, it may be used by multiple programs. This can make it difficult to know how to open a DAT file. However, if the DAT file is saved in a text format, you can view the contents of the file by opening it in a text editor.

Open With
Windows

IconOriginal program that created the file

IconAny text editor

macOS

IconOriginal program that created the file

IconAny text editor

Updated November 11, 2009
File Type 2 VCD Video File IconVCD Video File
File Format Standard
Usage Runs when opened
Rank ★ ★ ☆  Average
Description

A DAT file may also be a video file from a Video CD, or VCD disc. DAT files are typically found in the \MPEGAV\ directory of VCD disks and contain MPEG video data. They can be opened directly by supporting video playback programs.

Open With
Windows

IconCyberLink PowerDirector

IconCyberLink PowerProducer

IconNero

macOS

IconEltima Elmedia Player

IconVCDGear

IconVideoLAN VLC media player

Unix

IconVCDGear

IconVideoLAN VLC media player

IconMPlayer

Updated December 13, 2011
File Type 3 Exchange E-mail Attachment IconExchange E-mail Attachment
File Format Proprietary (Microsoft)
Usage Referenced by an application; not meant to be opened manually
Rank ★ ★ ★  Common
Description

Files named Winmail.dat contain formatting information for Rich Text (.RTF) messages sent from a Microsoft Exchange Server. A Winmail.dat file may be appended to the end of an e-mail when the recipient's e-mail client does not support RTF-formatted messages.

Open With
Windows

IconMicrosoft Windows Mail

IconMicrosoft Outlook

IconEncryptomatic Message Viewer Lite

macOS

IconKupon.BG Klammer

Updated May 13, 2009
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