FreeViewer OST File Viewer Tool

FreeViewer OST Viewer is a versatile utility that allows to examine and preview OST file in a seamless manner. With OST Email Viewer software, one can easily view Outlook OST file data such as emails, contacts, calendar etc. without Outlook installation. The tool permits the user to read OST file even corrupt, password protected, encrypted file in a trouble-free way. Best Software to browse OST file without Exchange Server and Outlook environment on Windows OS.

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  • View OST File's Emails, Contacts, Calendars, Tasks, Notes, & Journals
  • Browse OST File with Associated Email Attachments Without Outlook & Exchange Server
  • Pro Version with 7 View Mode (Hex, Mime, Header, etc.) to Analyze an Email in Depth
  • OST Viewer Software is Independent & Standalone to Speeds up Email Management
  • The Tool Designed to Read Normal, Corrupt, Password Protected, Encrypted OST File
  • OST Mail Viewer to Search Email Within OST Files with Advanced Search Option
  • Read OST File of Any Size & Avoid Oversized OST Mailbox Issues
  • Support all Windows 10, 8, 7 (32 bit or 64 bit) & Windows Server 2016, 2012 R2, 2008 & Outlook Version 2019, 2016, 2013, etc
  • Upgrade to Pro Version For Multiple Preview Mode, Advance Search, Export Feature

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Compatible with All Latest Windows OS

FreeViewer OST Viewer

3-Step Process to View and Examine OST File

Download and Install FreeViewer OST File Viewer tool on your local machine and launch it. Browse and select the OST file which you want to view

To analyze corrupt OST file, the user can make use of Quick Scan and Advanced Scan options. Once the corrupt OST file is scanned, the user can easily view Outlook OST file data

One can preview OST data including emails, contacts, calendar, tasks etc. The utility provides multiple preview options such as Normal Mail View, Attachments View, Properties View.

OST File Viewer – Overview

Get a Brief Overview of Free Microsoft OST Viewer Tool

Microsoft OST Email Viewer Tool Characteristics

Multiple tabs provided for easy viewing experience as well as for better navigation. Each tab will help you to view emails with different perspective.

Distinguishing feature that the software exhibits are:

  • View OST File Emails, Contacts Details, Journals, Calendars, Tasks and Notes that you have saved.
  • View emails from different OST files and folders under single navigation panel.
  • In-Depth Email analysis using the 8 different tabs that are designed to serve unique task.
  • Free OST Reader Software can also be used for forensic analysis purpose.
  • The software is simple to use, free to download and run on minimum hardware resources.
  • Comes with 32 & 64 bit OST file Support.
  • View normal or corrupt OST files.
  • View password protected OST files.
  • View Exchange OST files without Microsoft Outlook platform.
  • Maintains data integrity of the Outlook files.

Basic Information Regarding OST Extension

When emails are configured with the Microsoft Exchange Server then all the information related to your email id gets stored in .ost format. The purpose of this OST file is to create an offline version of the data that exist on the server that is viewable to the user even if there is no connectivity with the exchange server. Basically, OST file makes it possible for the user to work offline when the connectivity is not there. Additionally, all the changes made by the user are synchronized automatically when the connectivity is regained.

Download Microsoft Outlook Free OST Viewer

Download free OST File Viewer software to easily browse and read the content of OST files. The application displays the data of OST files without connecting to Microsoft Exchange Server and help you to view Offline OST Files with associated attachments. You can preview the email messages, contacts, calendar items, notes, etc. In addition to this, you can also view information such as the date of the message, who sent it, who received it, etc. Along with normal OST files, the OST file Viewer also displays the contents of corrupted and password protected OST files. The OST File Reader freeware works great on all the versions of Windows 10, 8, 7 (32 bit or 64 bit) & Windows Server 2016, 2012 R2, 2008.

An OST file is an offline folder file in Microsoft Outlook. With the help of these offline folders, users work offline and then synchronize the changes with the exchange server when they connect to the internet. OST mail viewer easily extracts information from the above defined OST files without having Microsoft Outlook installed. Using this software, you can preview all the contents available within your OST file.

A Complete OST File Analysis Tool

The Offline OST Viewer software will enable user to perform extensive research and analysis on the OST data. Applying the search query parameters will enable to retrieve back only the relevant information from the data and after that the targeted email can be further analyzed using the various tab provided (e.g. Hex Analysis).

The OST files are just the replicas of all the information that exists on the configured server. The user can make any changes in the content which then gets reflected on the server side as well.

Prominent Features of FreeViewer Outlook OST Mail Viewer Software

Microsoft OST Viewer Software's Features to Browse & View Outlook OST File

Standalone Application

OST Viewer is a standalone tool to read OST file emails and easily browse OST file attachments, contacts, calendar, tasks, notes, journal. The OST file reader is designed to help a user to view normal, corrupt, password protected or encrypted OST file in easy and secure way. This software does not require connectivity with Exchange Server to read OST file. Free download and install the application in any Windows OS including 10, 8, 7, etc.

View OST File Without Outlook

The OST file (Offline Storage Table) created by Microsoft Exchange Server and contains crucial information such as email details, appointment related data, task, notes among other information. To view OST file a user need to have supportive application such as Outlook, Exchange Server connectivity. The best OST reader tool allows a user to browse and view backup OST file without Outlook or Exchange Server connectivity with all important information.

Forensic Analysis of OST File

Unique OST reader application that lets a user to extracts Outlook OST files without having any password or username details of the mailbox. A perfect OST viewer tool for the forensic email investigator to browse OST file with multiple view option like Normal, Properties & Attachments.

Exporting to Adobe PDF

The OST file viewer pro version allows user to easily transfer the .ost data file into pdf file format for easy access and sharing purpose. User can also perform selective email analysis and get the output in pdf format. OST Viewer PRO will enable user to perform .ost to .pdf conversion.

Advanced Search Option

The Microsoft OST File Reader application makes easy for the users to search for a particular OST file among various file with the help of Advanced Search Option. Moreover, the user can also apply filtered searching which permits the user to search OST file more accurately. The user can implement filters such as To, Bcc etc. for searching OST file's emails with attachments. One can also make use of operators such as AND/OR to make search more precise.

Upgrade to OST Viewer Pro Version

In order to take benefits of advanced features of OST File Viewer, the user can upgrade to Microsoft OST Viewer PRO version. With this version, one can easily examine OST file and export it into the Portable Document Format. One can easily upgrade to PRO version directly from the Software interface. View, search, analyze or export normal, damaged or password protected OST files without Outlook and Exchange Server.

OST Viewer Software Specifications

Free Download OST Viewer Tool to Read OST File Without Outlook
  • Size: 18.1 MB
  • Version: 5.0
  • 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


Trial Limitations

Free OST Viewer Only Preview OST Files with Attachments, Upgrade to Outlook OST File Viewer Pro for Advance Search Option & Export OST Emails into PDF Format.

Application Pre-Requisites

If you are using Windows 10, 8, 7 (32 bit or 64 bit) & Windows Server 2016, 2012 R2, 2008, then please launch the tool as "Run as Administrator"
Microsoft .NET framework 4.5 and above

Supported Versions

Microsoft Windows 10, 8, 7 (32 bit or 64 bit) & Windows Server 2016, 2012 R2, 2008
Microsoft Outlook 2000, 2003, 2007, 2010(32/64 bit), 2013 (32/64 bit), 2016 (32/64-bit), 2019 (32/64-bit)

Product Guides

Installation Uninstallation User Guide
Offline OST Viewer Pro Order Now

Get an Overview of OST Viewer Features – Free vs Pro

Features Free Version Pro Version OST Recovery
View OST File Emails with Attachments
Scan and View Corrupt Outlook OST File
Advance Search Option
Unlimited OST File Size
Dual File Scanning Option
View and Export into PDF
Advance Search Option
Multiple Naming Option
Export OST into Multiple Format
Supports Outlook 2019, 2016, 2013, 2010, 2007, 2003, etc.
Exchange Server 2019, 2016, 2013, 2010, 2007, 2003, etc.
Customer Support
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Frequently Asked Questions

Listed Commonly Asked Questions and Answers

Best 4 Steps Process to View OST Files without Outlook / Exchange Server:

  • Step 1: "Free Download" & Install OST Viewer Tool
  • Step 2: Browse OST File. Select Scan Mode: "Quick" & "Advance"
  • Step 3: Choose View Mode: "Normal, Properties, Attachments"
  • Step 4: Select Switch View: "Horizontal" & "Vertical"

Yes, the OST File Viewer Tool is not dependent on the Outlook application or the Exchange Server environment and works great without them.

Yes, the OST Reader Tool is free and can be used on unlimited machine as long as the usage falls within our fair usage policy.

Yes, the OST Viewer Tool is compatible with all the versions of Windows operating system (10, 8.1, 8, XP, Vista, etc) and works great with them.

Yes, the OST File Reader Software provides you with the preview of normal, damaged as well as password protected files.

Yes, the Microsoft OST Reader Utility allows the user to scan corrupt OST file with Advanced Scanning option. After that, the user can view and examine corrupted OST file.

Yes, you can easily view and analyze OST file email, contacts, calendar, tasks, notes with the help of the Microsoft OST Viewer Utility.

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