.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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TNEF

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Home File Types Uncommon Files TNEF

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 Japan, with a majority of them running Windows 10. In most cases, these users are surfing the internet using the Google Chrome browser.

Associated Developers and Software

	Apple Mail by Apple
	Microsoft Outlook by Microsoft Corporation
	Microsoft Outlook Express by Microsoft Corporation

Top TNEF User Languages

Top TNEF File User Browsers

Desktop Friendly?

Mobile Friendly?

Top User Operating Systems


Windows 10	Windows 11	Windows 6	Windows 8.1

Associated Operating Systems

	Windows
	Mac
	iOS

Other File Types Related to TNEF Files

Extension	File Type Developer	File Category	File Type Description
.VFD	Microsoft Corporation	Disk Image Files	Virtual Floppy Disk
.QDS	Microsoft Corporation	Uncommon Files	Windows Directory Query File
.LOL	Apple	Developer Files	LOLCODE Source Code FIle
.CONFIG	Unknown Developer	Developer Files	Configuration File
.GIX	Microsoft Corporation	Data Files	Genigraphics Graphics Link Presentation File
.CSD	Valve	Game Files	Steam Game Data Backup File
.LKO	Microsoft Corporation	Data Files	Outlook Express Linked Object
.ATD	Planit Solutions, Inc.	CAD Files	Alphacam Lathe Drawing
.WDPROJ	Microsoft Corporation	System Files	Microsoft Visual Studio Web Deployment Project File
.BGL	Babylon Software Ltd.	Data Files	Babylon Glossary File