How to open Outlook data files

Just follow these simple steps:

1. Download install and launch OST PST Viewer on your PC;
2. To add a file to OST PST Viewer, go to the "File" tab and click "Open";
3. Choose an PST or OST file you would like to open;
4. Explore your PST file content.

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System Requirements

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OST PST Viewer Customer Reviews

Average Rating: 4.8/5 - 280 reviews

“ I downloaded the OST PST Viewer and it is SO much easier than trying to load old PST files into Outlook. OST PST Viewer lets me search my archives - then put them away neatly. Very handy tool indeed! ”

dan d.

How to open Outlook data files using OST PST Viewer

OST PST Viewer is a free* software designed to View PST and OST files in a few clicks. Open PST and OST orphaned Outlook data files. Learn how to open Outlook data files instantly with or without Outlook account.

*The OST PST Viewer free version has limited features. Advanced search, export files, copy text, save attachments, print items features are available only with Pro version of OST PST Viewer.

About 4Team Corporation,

the company behind OST PST Viewer

4Team Corporation is a Microsoft Partner and independent software vendor for enterprises and individuals. We started our business in 1999 as a corporation in the United States. We have over 15 years of experience in developing Microsoft Windows software, Add-ins in the Microsoft Outlook environment.