.OST File Overview

File Extension:	OST
File Type Description:	Outlook Offline Data File
File Type Developer:	Microsoft Corporation
Primary Associated Software:	Microsoft Outlook 2016
Primary Software Developer:	Microsoft Corporation

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Home File Types Uncommon Files OST

What is File Extension OST?

Primarily, a OST file extension is a type of Outlook Offline Data File file developed for the Microsoft Outlook 2016 software program by Microsoft Corporation. Website visitor analysis indicates that OST files are commonly found on Windows 10 user machines, and are most popular in Romania. Frequently these users are visiting our web site using Google Chrome.

Associated Developers and Software

	4Team Corporation OST PST Viewer by 4Team Corporation
	Aryson OST Recovery by Aryson Technologies
	Microsoft Outlook 2016 by Microsoft Corporation
	Remo Convert OST to PST by Remo Software
	OEMailRecovery.com Outlook Recovery Toolbox by Microsoft Corporation

Top OST User Languages

Top OST File User Browsers

Desktop Friendly?

Mobile Friendly?

Top User Operating Systems


Windows 10	Windows 11	Windows 6	Windows 8.1

Associated Operating Systems

	Windows
	iOS
	Android
	Windows Phone
	OS X El Capitan

Other File Types Related to OST Files

Extension	File Type Developer	File Category	File Type Description
.BDR	Microsoft Corporation	Text Files	Exchange Non-Delivery Report Body File
.F6	Various Developers	Font Files	Fonts File
.VSSETTINGS	Microsoft Corporation	Settings Files	Visual Studio Settings File
.MSDVD	Microsoft Corporation	Video Files	Windows DVD Maker Project File
.UMF	GetMediaHolder.com	Data Files	MediaHolder Universal Media Format File
.HSK	Huskey Truss & Building Supply	Data Files	Huskey Truss & Building Supply Import File
.CR2	Canon Inc.	Camera Raw Files	Canon Digital Camera Raw Image File
.ALD	Microsoft Corporation	Data Files	Dynamics AX Application Label Data File
.LGS	Microsoft Corporation	Data Files	Microsoft Windows Application Log File
.DA2	Microsoft Corporation	Video Files	Windows Dancer File