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(Average Rating 4.7 Based on 436 Reviews)

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FreeViewer OST Viewer Tool

Download the free OST Viewer tool to open and read OST files without Microsoft Outlook or Exchange Server. Supports corrupted, encrypted, and password-protected OST files on Windows 11 and below.

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View OST File: Emails, Contacts, Calendars, Attachments, Tasks, Notes, & Journals
Read OST File with Email Attachments Without Outlook & Exchange Server
View OST File Data in 2 Different Modes: Normal Mail View and Attachments
Allows Users to Read Normal, Corrupt, Password Protected, and Encrypted OST Files
OST Viewer to Search Emails Within OST Files with Advanced Search Option
OST Explorer Allows to Read OST Files of Any Size without Any Limitation
Supports OST File of Outlook 2021, 2019, 2016, 2013, 2010, and Below Versions
OST Reader Software is Compatible with Windows 11 and All Below Versions
Pro and Pro+ Version Have Multiple Preview Mode, Advance Search, Print Feature
Multiple Export Options are available in Pro+ Version with OST Viewer Features

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OST viewer is available in three different version Free, Pro, and Pro+. Choose wisely as per your need.

Comparison Between OST Viewer, Pro, & Pro+ Version

OST viewer comes with different versions to provide a variety of features. Here is a detailed list of the features users can opt with every version:

free ost viewer

OST Viewer

When users use this OST reader on their PC, users will be get access to a lots of features

Read Entire OST Files
Different preview modes to conveniently view the information of the OST file.
Preview All Items: Emails, calendar, contacts, tasks, notes and journal.
Compatible with Windows 11 and below versions.
Capable to open large size OST file and allows to read data.

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feature of viewer pro version

OST Viewer Pro Version

When users upgrade to OST viewer pro version, then users will get a few additional features:

Features of Free OST Viewer

Search for OST Files within a Particular Drive or Across All Drives.
Allow Multiple Files Processing at Same Time.
Remove SMIME / OpenPGP Encryption from OST File
Advanced Search Option with Multiple Conditions.
OST Viewer Allows to Export Complete Data into PDF.
OST File Reader Allows to Print OST Emails.
Know Steps to Use Viewer Pro

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ost viewer pro+ version features

OST Viewer Pro+ Version

OST Viewer Pro Plus is the most advanced edition, comes with the multiple features.

Features of Free OST Viewer

Features of Outlook OST Viewer Pro

Export All Data into PST Format
Convert Emails into MBOX format
Convert All Items into Individual MSG File
Export Only Emails in the form of EML or EMLX
Read OST File and Export in CSV file format
Understand Steps to Use Viewer Pro+

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OST Viewer Tool - Working

How to Read OST File Data without Outlook?

Browse OST File in Software

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

Scan The OST File

Use Quick Scan and Advanced Scan options to analyze a corrupt OST file. Once the corrupt OST file is scanned, the user can easily read Microsoft Outlook OST file data.

Preview OST File Data

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

OST File Viewer Tool – Overview

Get a Brief Overview of Free Microsoft OST Viewer Software

Microsoft OST Viewer Tool Characteristics

The software provides multiple tabs for easy viewing experience as well as better navigation. Each tab will help you to view emails with a different perspective.

Distinguishing Features of OST File Viewer

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

Download Microsoft Outlook Free OST Viewer

Download OST File Viewer software free demo version to easily browse and read the content of OST files. The utility displays the data of OST files without connecting to Microsoft Server and help you 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 and who received it. Along with normal OST files, the OST viewer also displays the contents of corrupted and password protected OST files. The OST reader freeware works great on all the versions of Windows 11 (64 bit), 10, 8, 7 (32 bit or 64 bit) and Windows Server 2019, 2016, 2012 R2, 2008.

An OST file is an offline folder in Microsoft Outlook. With the help of these offline folders, users can work offline and then synchronize the changes with the Exchange Server when internet connection restored. OST explorer easily extracts the information from the above defined OST files without having Microsoft email clients 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 enables users to perform extensive research and analysis on the OST data. Applying the search query parameters allows you to retrieve back only the relevant information from the data and after that the targeted email can be further analyzed using the various tabs (e.g. Hex Analysis).

OST files are just 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.

Basic Information Regarding OST Extension

When emails are configured with Microsoft Exchange Server or IMAP protocol, then all the information related to your email id gets stored in the .ost format. The OST file is an offline version of the data that exist on the server and is viewable to the user even if there is no connectivity with the Exchange Server. All the changes made by the user are synchronized automatically when the connectivity is regained.

Outlook OST Viewer Tool - Prominent Features

Free Download Microsoft OST Viewer Software to View Outlook OST File

Standalone Software to Read OST

OST viewer is a standalone tool to read OST file emails and easily browse OST file attachments, contacts, calendars, tasks, notes, and journals. The OST file reader is designed to help users view normal, corrupt, password-protected, or encrypted OST files in an easy and secure way. This software does not require connectivity with Exchange Server to read OST files. You can freely download and install the application in Windows OS 11, 10, 8, 7, etc.

View OST File With Attachments

The OST file (Offline Storage Table) created by Microsoft Exchange Server contains crucial information such as email details, appointment related data, task, and notes among other information. To view OST files with attachments, users need to have a supportive application such as Outlook or Exchange Server. The best OST reader tool allows users to browse and view backup OST file emails and attachments with all the important information.

Forensic Analysis of OST File

Unique and free OST reader application lets a user analyze Microsoft Outlook OST files even without having any password or username details of the mailbox. It is the perfect OST viewer tool for forensic email investigators to browse OST files with multiple view options like Normal, Properties and Attachments.

Export OST to Portable Format

The OST File Viewer Pro version allows users to easily transfer the .ost data file into portable file format for easy access and sharing purposes. Users can also perform selective email analysis and get the output in the portable format. OST Viewer Pro will enable users to perform OST to Portable Document Format conversion.

Built-in Advanced Search Option

The Microsoft OST File Reader application has the feature Advanced Search Option which makes it easier for users to search for a particular OST file among multiple files. Users can also apply filters, such as To and Bcc, for more effective search results. One can also make use of operators such as AND/OR to make the search more precise. Also, get the export option to save searched emails and their attachments into PDF format.

Upgrade to OST Viewer Pro Version

In order to take benefits of the advanced features of OST File Viewer, the user can upgrade to Microsoft OST Viewer PRO version. With this version, one can easily examine the OST file and export it to the Portable Document Format. One can easily upgrade to PRO version directly from the Software interface. Use this software to view, search, analyze or export normal, damaged or password protected OST files.

OST Viewer Software - Specifications

Read OST File Emails and Attachments Using Free Software

Processor

1GHz processor (2.4 GHz is recommended)

Memory & Storage

4 GB of RAM | 100 MB of free hard disk space required

Deployment Prerequisites

Supported Editions

FAQs

Q: Is Anti-Virus blocking the export process?

Disable Anti-Virus temporarily or whitelist the software in your settings for proper functionality.

Q: Unable to create output in destination?

Avoid using NAS, SAN, or Network drives. Ensure the source file is on the local migration machine to perform successful migration.

Software Download

Release v5.0 | File Size: 18.1 MB

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Trial Limitations

OST viewer free allows to read OST File data and their Attachments. To use the Advanced Search & Export Option upgrade/switch to Pro version.

Installation Uninstallation User Guide

Electronic Delivery

The delivery of product is automated. You will receive an email containing both the link to download and the activation key within few minutes.

OST Viewer Tool - Feature Comparison

Choose The Right Version from Free, Pro, and Pro+ As Per Need

Features	Free	Pro	Pro+
View OST File Emails with Attachments
Scan and View Corrupt Outlook OST File
Open and Read Large Size OST File
Dual File Scanning Option
Save into Portable Document Format
Built-in Advanced Search Option
Multiple Naming Options to Save Data
Export and Save OST File Data into Multiple Format
Supports Outlook 2024, 2021, 2019, 2016, 2013, 2010, 2007, 2003, etc.
Exchange Server 2019, 2016, 2013, 2010, 2007, 2003, etc.
Cost	FREE	$69	$129
	Download	Purchase	Purchase

Frequently Asked Questions

Commonly Asked Questions for Better Understanding of The Tool

Client Feedbacks on Our Tool

Get User Reviews After Using Free OST Viewer on Windows OS

Mia

Australia

"Microsoft Outlook was not installed on my computer. I wanted to browse an OST file given to me by my colleague. Instead of installing the heavy Microsoft Outlook application, I tried this OST viewer freeware and it worked. This software really works great in any Windows OS including 11, 10."

Nelson Kallis

Sweden

"I would like to thank the FreeViewer team as their Offline OST Viewer software helped me to browse my OST files when I was on a business tour and the Microsoft Office installed on my laptop got corrupted. I downloaded this free software and my work was done. You guys are really doing a good job."

Jack Brown

New York

"Recently, one of my clients shared an OST file with me and I needed to browse and view that OST file with associated attachments. Then I found OST Email Viewer, which is an outstanding utility. It was easier for me to browse and view OST email using the software without any problem. My experience was good using this smart tool."

Lily James

Canada

"I am impressed with the features and user-friendly interface of the FreeViewer OST Viewer. I don't have any technical knowledge; still I was able to work with the software due to its easy-to-use interface. When it comes to performance, this software is just outstanding!"

4.7

436 Ratings

5 Star 87.6%

4 Star 4.6%

3 Star 4.6%

2 Star 1.1%

1 Star 2.1%

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