Microsoft OST Viewer Tool

View OST File Without Outlook / Exchange Server Using the Best and Free Utility

  • Simultaneously Add and View Multiple OST Files via Bulk Mode
  • Capable of Processing Healthy, Corrupted, and Orphaned File
  • Read OST File Items like Emails, Calendar, Contacts, and More
  • Recover Deleted OST File Items by selecting Advance Scan Mode
*Free Version Is Not Available

Why Should Choose SYSDaddy Microsoft OST Viewer Tool?

Lots of free tools are available online to view OST files, but they don't keep email properties. In addition, they are unable to read corrupted and deleted OST files. Hence, it is not advisable to use online tools. To analyze and read OST files with 100% security, the SYSDaddy Outlook OST file viewer is the experts' first choice. This software is completely free and displays Outlook offline data files with all items like emails, calendar entries, contacts, etc. It's powerful enough to view multiple OST files with all their attachments in a single Window. The Microsoft OST reader software can view OST files without Outlook installation and Exchange Server environment.

Prime Features of Free Microsoft OST File Viewer

View Multiple OST Files

Loads Multiple OST Files

Microsoft OST viewer tool users are free to read Exchange OST files as much they want. There is no limitation imposed in this freeware on total number of OST files to read. You can browse source OST files one after the another to analyze the content of several Outlook data files simultaneously.

Preview All OST Items

Previews All OST Items

The Microsoft OST reader software processes the browsed file in a way that it fetches all mailboxes from source OST file. Emails with attachments, contacts, calendars, journals, etc., can be viewed absolutely for free with this application. Attachments file format will be same as it was before processing.

Two Scan Modes

Offers Two Scanning Mode

Free Outlook OST file viewer enables its customers to view healthy, corrupted, and orphaned .ost file with it. If the file is healthy or comprises of less corruption within it, quick scan mode is suitable for file processing. Otherwise, one have to select Advance Scanning mode to fetch data from severely corrupted file.

View OST File

No Supportive App Needed

Microsoft OST viewer tool has been programmed with the motto of no prerequisites of Exchange server or Outlook installation. Without any headache, interested clients simply have to download and install the setup file of this freeware. After installation, you can view OST file without Outlook installation and Exchange Server environment.

Read OST File

Optimized OST File Reading

Without popping up any crash report, this Microsoft OST file viewer enables users to view and read OST files with entire items. The tool renders an option of changing the Temp folder location of software i.e., from installation disk (C:) to any other free space. The purpose of this is to lessen the main PC memory.

Support All Outlook Version

View OST of All Outlook Version

With this Microsoft OST Reader, it is easy to view OST file from any Outlook version. The tool supports all OST file created from Outlook 2019, 2016, 2013, 2010 and other versions. Moreover, one can easily install the software on Windows 11, 10, 8, 7, and other previous versions.

SYSDaddy Microsoft OST Viewer Tool - Working Steps
  • Step 1
    Run Outlook OST File Viewer

    Download and Install Microsoft OST Reader Tool on your PC.

  • Step 2
    Add OST File

    Select from Quick and Advanced Scan mode.

  • Step 3
    Successfully View Files

    View OST file in different modes as per the choice.

Microsoft OST Viewer
Microsoft OST File Viewer Tool
Select Mode
View OST Files
Software Specifications
Download Free OST File Viewer Tool

System Specifications

Hard Disk Space
100 MB of free hard disk space


Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz


  • Microsoft .NET framework 4.5 or above must be installed.
  • If you are using Windows 11 / 10 / 8.1 / 8 / 7, then please launch the tool as "Run as Administrator".

Supported Editions

  • Microsoft Windows 11(64-bit) / 10(32-bit & 64-bit) / 8 / 7 & Windows Server 2008 / 2012 R2 / 2016
  • Microsoft Outlook 2000, 2003, 2007, 2010, 2013 (32/64 bit), 2016 (32/64-bit), 2019 (32/64-bit)

What Clients Say about SYSDaddy OST Reader Software

On my Office PC with the Microsoft Windows 10 operating system, everything worked fine with Outlook 2016 and Exchange Server. All of a sudden I don't know what happened, that I lost all my access from the source email client. I restarted all associated applications on my computer, but nothing worked. Luckily I had this Microsoft OST viewer tool on my personal laptop which actually saved my life. I was able to work with some core emails that I had to write a project report on and present to my managers by the next morning.

Microsoft OST Viewer User Review

Anthony A. Ligo

Kind regards to the development team of this freeware. I really appreciate the hard work and mindset the developers considered in creating this product. If I explain my reason for using this free Microsoft OST file viewer, it would surely be a one-sided review. So, to keep my words short, I want to say that this product eliminates all of the problems an investigator faces when having to view data from orphaned OST files. This is the perfect app to view ost files from the latest Microsoft Outlook versions on the Windows platform for free.

Microsoft OST Reader User

Billy K. Jones

Free Microsoft OST Viewer Review Review Microsoft OST File Viewer
Yes, our Microsoft OST reader freeware is capable of displaying all types of email attachments from processed OST file. It supports images, text files, documents, etc., as the attachment.
No, there is no OST file size restriction aspect in this Microsoft OST reader wizard. You are free to browse Outlook data file of any size.
Yes, SYSDaddy OST viewer is capable to view damaged and deleted data from OST file.
No, this freeware only provides preview of OST file data files. To save email in portable format, you can download OST file converter software on the computer.

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