OST Viewer



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 this software, one can easily view 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 open OST file without Exchange Server and Outlook environment on Windows OS.

(Average Rating 4.9 Based on 400 Reviews)
  • View OST File Emails, Contacts, Calendars, Tasks, Notes, & Journals
  • Open 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
  • Search Email Within OST Files with Advanced Search Option
  • Read OST File of Any Size & Avoid Oversized OST Mailbox Issues
  • Support all Windows OS 10, 8.1, 8, 7, Vista, XP & all Outlook Version 2019, 2016, 2013, etc
  • Upgrade to Pro Version For Multiple Preview Mode, Advance Search, Export Feature

FreeViewer Awards & Reviews

2019 Best Rated and Popular tool to Read and Analyze Outlook OST File

FreeViewer OST Viewer

3-Step Process to View and Examine OST File

OST File Viewer – Overview

Get a Brief Overview of OST Viewer Tool

Microsoft OST 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 Viewer 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.

Some Basic Information Regarding the 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 open 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 Viewer freeware works great on all the versions of Windows operating systems such as 8, 7, XP, Vista and 98.

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 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 Viewer Software

OST Viewer Software's Features to Open Outlook OST File

Standalone Application

Standalone Application

OST Viewer is a standalone tool to read OST file emails and easily open 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, 8.1, 8, etc.

Open OST File

View OST File Without Outlook

The OST file (Offline Storage Table) created by MS 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 open OST file without Outlook or Exchange Server connectivity with all important information.

OST File Forensic

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 open OST file with multiple view option like Normal, Properties & Attachments.

Export Offline OST

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

Advance OST Search

Advanced Search Option

The utility 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 emails. One can also make use of operators such as AND/OR to make search more precise.

Update Pro & Pro+

Upgrade to OST Pro / Pro+ Version

In order to take benefits of advanced features of OST Viewer, the user can upgrade to PRO and PRO + version. With these versions, one can easily examine OST file and export it into the different file format. One can easily upgrade to PRO/PRO + version directly from the software interface.

OST Viewer Software Specifications

Download OST Viewer Tool to Read OST File Without Outlook

Software Download

Size: 6.9 MB

Version: 4.2

Trial Limitations

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

System Specifications

Hard Disk Space
24 MB of free hard disk space required

512 MB of RAM (1 GB is recommended)

1GHz processor (2.4 GHz is recommended)

Application Pre-Requisites

If you are using Windows 10/8.1/8/7 or Vista, then please launch the tool as "Run as Administrator".
Microsoft .NET framework 4.0

Supported Versions

Microsoft Windows
2000, 2003, 2008, XP, Vista, or Windows 7/8/8.1/10, 2008/2012 (32-bit & 64-bit)/10

Microsoft Outlook
Outlook 2000, 2003, 2007, 2010(32/64 bit), 2013 (32/64 bit), 2016 (32/64-bit), 2019 (32/64-bit)


Electronic Delivery

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
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.
Cost FREE $69 $49
Frequently Asked Questions

Listed Commonly Asked Questions and Answers

Will the software work without MS Outlook or Exchange Server Environment?
Yes, the OST file viewer software 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 software 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, corrupted as well as password protected files.
Yes, the utility allows the user to scan corrupt OST file with Advanced Scanning option. After that, the user can view and examine the OST file.
Yes, you can easily view and analyze OST file email, contacts, calendar, tasks, notes with the help of the utility.
What Customers Are Saying

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