OST Viewer Box

Free OST Viewer Tool

Freeware Offline OST Viewer Software to open and read OST file emails and their attachments, contacts, calendars, etc items. The OST Reader Tool will scan OST file and preview data into multiple preview modes without Outlook and Exchange Server.

(Average Rating 4.5 Based on 143 Ratings)
  • Open, View & Read OST File Data without Outlook, Exchange Server Environment
  • Open OST File Contents: Emails, Attachments, Contacts, Calendars, Tasks, Notes, Journals
  • Provides Preview Modes to View OST File: Normal Mail View and Attachments Panel
  • Advance Scan to Open Orphan, Corrupted, Inaccessible, Offline Exchange, Outlook OST File
  • Open OST File from Microsoft Outlook 2019, 2016, 2013, 2010, 2007, 2003 Version
  • OST Viewer is Compatible with Windows 10, 8, 7 & Windows Server 2016, 2012 R2, 2008
  • Upgrade to Pro Version to Search, Print and Export Exchange / Outlook OST to PDF Files
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Features of Free Outlook OST Reader Tool

Free Tool to Open, View, Read OST File without Outlook & Exchange Environment

View OST File Content

Using Free OST Viewer tool, users can easily open and read OST Emails, Contacts, Calendars, Tasks, Notes, Journals. The software is capable enough to generate display of properties of messages as from, subject, to, received date, size in bytes etc. In addition to it, software enables the users to view properties of attachments like images, files, documents, etc.

Scan OST File Via Two Scanning Modes

The OST File Opener software is capable enough to scan the OST files easily. The scanning process in Outlook OST file is done in two ways i.e., using Quick scan and Advance scan. If an OST file is highly corrupted, users should go for Advance scanning option. By default, the Offline OST Viewer tool performs the quick scan in the OST files.

View Contacts and Calendar of OST

The designing algorithm of Outlook Free OST Reader freeware allows users to preview OST contacts, emails, calendars along with distribution list. While launching the wizard, it generates same view of contacts as present in Microsoft Outlook. Additionally, screen shows mails by default but on navigating users also get calendar tab to view and explore the calendars.

Optimize Outlook OST Files Viewing

The Exchange OST Analyzer permits users to get display of OST file items in an optimized way. It does not generate the crash report while optimizing. It provides an option to change location of a temporary folder from the C drive i.e., installation drive for freeing the space. This helps in reducing the space of the memory consumption.

Outlook & Exchange Not Required

The utility is Best OST Viewer, that it can easily open OST file without being present in Outlook and Exchange arena. The tool really works as a stand-alone utility in case of opening and previewing OST files. The best part of the tool is that it works best with Windows 10, 8, 7 (32-bit or 64-bit) & Windows Server 2016, 2012 R2, 2008.

Preview of OST files in different Views

The Free OST Reader tool has so easy user interface and designing algorithm that it can easily support multiple views. Offline OST Viewer allows the user with 6 interfaces like Normal mail view, Hex view, properties view, MIME view, HTML view, RTF view, message headers, and the attachments. Users can easily opt for any one of them.

System Specification

System Requirement by OST Analyzer software to Open & Read OST Files

  • Support: Windows 10, 8, 7 (32-bit or 64-bit) & Windows Server 2016, 2012 R2, 2008.
  • Processor: 1 GHz Processor(2.4 GHz is recommended).
  • RAM: 2 GB of RAM (2 GB is Recommended).
  • Hard Disk Space: 100 MB of Free Hard Disk Space Required.
  • Download Free OST Viewer Software to Open, View, Analyze & Read Data of Offline OST File
Product Details
  • Version: 5.0
  • File Size: 18.1 MB
  • MD5: 7920bd60326278c1bd912f4146f604d7

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OST Viewer Tool – Online Video

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Check What Users Say

What Our Client Say’s About OST Analyzer Freeware

Frequently Asked Questions

User’s Query Related to Free OST Reader Tool & Their Solution

“I have so many OST files. Few of them are severely corrupted but some have minor corruption. I need to scan the files to resolve the issue. Does the utility provide an option to scan the damaged files?”


A. Yes, the Offline OST Viewer provides two options to scan the corrupted files. One is Quick Scan for minor corruption and the other one is Advance Scan for highly corrupted files.

“I am using Outlook since 4 years. Earlier I was working on previous version of Microsoft Outlook. Recently, I updated my system and got files imported. Now, I have so many orphaned OST files. Does utility support those files?”


A. Yes, the orphaned OST files are easily opened and viewed using OST viewer freeware without the Exchange Server and Microsoft Outlook installed.

“I had Windows 7 installed in my laptop. Recently due to some software issues in the system, I had to upgrade my system to Windows 10. I have many OST files made in Win 7. Is your Free OST Reader software compatible with Windows 10?”


A. Yes, the freeware is completely compatible with Windows 10, 8, 7 (32-bit or 64-bit) and Windows Server 2016, 2012 R2, 2008. You can easily open and view OST file without Outlook using the tool.


A. No, you will not find any restrictions based on the file size. You can easily view, and open all Outlook OST files using the OST File Analyzer utility.


A. Yes, using the OST Reader freeware, users can easily get preview the emails along with attachments of the offline OST files.


A. Yes, The OST File Analyzer tool allows user to open corrupted OST file. For this software provides two scanning Modes 1: Quick Scan, 2: Advanced Scan. After scanning it will open corrupted Outlook offline OST file.