| 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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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 United States. Frequently these users are visiting our web site using Google Chrome.
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | iOS |
 | Android |
 | Windows Phone |
 | OS X El Capitan |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .KDS | Knyzhov Dmitry | Settings Files | KD Player Skin File |
| .JTP | Microsoft Corporation | Page Layout Files | Windows Journal Template |
| .BFB | Microsoft Corporation | Game Files | Zoo Tycoon 2 Model File |
| .PPV | Microsoft Corporation | Data Files | Pocket PowerPoint Presentation |
| .P12 | RSA Laboratories | Web Files | Personal Information Exchange File |
| .RC_ | Microsoft Corporation | Data Files | Microsoft WinHelp Compressed Help Document |
| .DIZ | Unknown Developer | Text Files | Description In Zip File |
| .XHTML | Opera Software | Web Files | Extensible Hypertext Markup Language Document |
| .BIK | RAD Game Tools | Video Files | Bink Video File |
| .DWFX | Autodesk, Inc. | CAD Files | Design Web Format XPS File |
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