.TNEF File Overview

File Extension: TNEF
File Type Description: Transport Neutral Encapsulation Format
File Type Developer: Microsoft Corporation
Primary Associated Software: Microsoft Outlook Express
Primary Software Developer: Microsoft Corporation

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What is File Extension TNEF?

Microsoft Corporation developed the Transport Neutral Encapsulation Format file type when the Microsoft Outlook was initially released. According to our internal data, Transport Neutral Encapsulation Format files are most popular with users in United States, with a majority of them running Windows 10. In most cases, these users are surfing the internet using the Google Chrome browser.

Top TNEF User Languages

Top TNEF File User Browsers

Desktop Friendly?


Mobile Friendly?


Most Popular TNEF File Countries

Top User Operating Systems

Windows 7 Windows 10 Windows 8.1 Windows XP

Associated Operating Systems


Other File Types Related to TNEF Files

Extension File Type Developer File Category File Type Description
.WSC Open Source Game Files WonderSwan Color Game ROM
.SSQ Microsoft Corporation Developer Files ODBC Script File
.OAB Microsoft Corporation Data Files Offline Address Book
.WEAP id Software Game Files Quake 3 Engine Weapon File
.EDB Microsoft Corporation Database Files Exchange Information Store Database
.CSH Adobe Systems Incorporated Uncommon Files Photoshop Custom Shapes File
.MP2V Roxio Video Files MPEG-2 Video File
.STN ON1, Inc. Vector Image Files Genuine Fractals Image
.MENU id Software Game Files Quake 3 Engine Menu File
.LDF Microsoft Corporation Data Files SQL Server Transaction Log File

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