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.MSG File Extension

2 file types use the .msg file extension.

File Type 1Outlook Mail Message

3.5 (116 Votes)
CategoryText Files


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

What is an MSG file?

An MSG file is an email message, contact, appointment, or task created or saved within Microsoft Outlook. It may contain one or more email fields, which includes the date, sender, recipient, subject, and message body, or contact information, appointment details, and one or more task descriptions. MSG files are also compatible with other programs that use Microsoft's Messaging Applications Programming Interface (MAPI).

More Information

You can create an MSG file by simply dragging and dropping a message, appointment, contact, or task item from an Outlook folder to a folder in Windows Explorer. The message subject will be used as the name of the MSG file. You can also drag and drop the MSG file back into Outlook and it will be formatted appropriately to appear the same way it did before it was exported.

Open and view .MSG files with File Viewer Plus.
Programs that open MSG files
Updated 4/4/2018

File Type 2Fallout Message File

DeveloperBethesda Softworks
3.1 (12 Votes)
CategoryGame Files


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

.MSG File Association 2

File used by Fallout 1 and 2, which are two installments of the post-apocalyptic open world video game series; contains character and item dialogues and in-game messages that are referenced when interacting with characters and items during gameplay.

More Information

MSG files are located in the text\english\dialog and text\english\game directories of your game.

Each indexed line of text has three sets of {}. The first set indicates the line index, which is represented by a number. The second set indicates the name of an optional associated .ACM sound file. The third set contains the text that is displayed, whether it be for an observation window or dialogue box.

NOTE: Interplay and Black Isle Studios originally developed Fallout 1 and 2 before Bethesda Softworks acquired the rights.

Programs that open MSG files
Updated 10/18/2016

About MSG Files

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