SysTools OST Viewer
SysTools Software Pvt. Ltd. – SharewareEffortless Access to OST Files with SysTools OST Viewer

SysTools OST Viewer provides a straightforward and efficient way to open and view offline Outlook data files without the need for Outlook installation.
SysTools OST Viewer is a free software program developed by SysTools Software Pvt. Ltd. for viewing and analyzing the contents of Outlook OST files. This tool provides an easy-to-use interface for users to access email messages, contacts, calendar events, and other data stored in OST files.
With SysTools OST Viewer, users can extract valuable information from inaccessible or corrupted OST files without needing to have Microsoft Outlook installed on their system. The software is compatible with all versions of Windows operating systems and is available for download on the company's website.
- Features:
- View and read Outlook OST files
- Preview email messages with attachments
- View contacts, calendar events, tasks, notes, etc.
- Supports both ANSI and Unicode OST file formats
SysTools OST Viewer can be used by anyone who needs to access or analyze the data stored in Outlook OST files. This tool is especially useful for IT professionals who need to troubleshoot email account issues or recover data from damaged OST files.
Users can also upgrade to SysTools OST Recovery software to convert OST files to PST and other file formats while maintaining the original data integrity.
Note: This software is not intended for commercial use or redistribution without permission from SysTools Software Pvt. Ltd.
Overview
SysTools OST Viewer is a Shareware software in the category Miscellaneous developed by SysTools Software Pvt. Ltd..
The latest version of SysTools OST Viewer is currently unknown. It was initially added to our database on 05/05/2012.
SysTools OST Viewer runs on the following operating systems: Windows.
SysTools OST Viewer has not been rated by our users yet.
Pros
- User-friendly interface that is easy to navigate
- Allows users to view OST files without needing Outlook installed
- Supports a variety of file formats for export including PST, EML, and MSG
- Enables searching of specific emails within the OST file
- No need for technical expertise to operate the software
- Lightweight application that runs smoothly on most Windows systems
- Free version available with limited features for basic use
Cons
- Limited functionality in the free version which may not be sufficient for all users
- Exporting options may require purchasing the full version
- Does not allow editing of the OST file contents, only viewing
- Performance can be slow with very large OST files
- Lacks some advanced features found in other comparable tools
- Support can be limited for free version users
FAQ
What is SysTools OST Viewer?
SysTools OST Viewer is a software developed by SysTools Software Pvt. Ltd. that allows users to open and view the content of ANSI and Unicode OST files without the dependency of Outlook application.
Can I view OST files without Outlook using SysTools OST Viewer?
Yes, SysTools OST Viewer enables users to open, view, and explore the contents of OST files without requiring Microsoft Outlook to be installed on the system.
Is SysTools OST Viewer a freeware tool?
Yes, SysTools OST Viewer is available as a freeware tool that can be downloaded and used at no cost for viewing OST file content.
What types of OST files are supported by SysTools OST Viewer?
SysTools OST Viewer supports both ANSI and Unicode OST files for viewing their contents conveniently.
Can I open corrupted or damaged OST files with SysTools OST Viewer?
No, SysTools OST Viewer is designed to open healthy and accessible OST files. It may not be able to handle severely corrupted or damaged OST files.
Is there a file size limitation for opening OST files with SysTools OST Viewer?
There is no specific file size limitation mentioned for opening OST files with SysTools OST Viewer. However, performance may vary based on the file size and system resources.
Can I search for specific items within an OST file using SysTools OST Viewer?
Yes, SysTools OST Viewer provides a search functionality that allows users to find specific items within the opened OST file, making it easier to locate information.
Does SysTools OST Viewer modify the original OST file in any way?
No, SysTools OST Viewer is a read-only tool that does not make any changes to the original OST file. It only allows users to view the contents of the file without altering it.
Is technical support available for SysTools OST Viewer users?
Yes, SysTools Software Pvt. Ltd. offers technical support to assist users with any queries or issues related to using SysTools OST Viewer.
Can I export data from an OST file using SysTools OST Viewer?
No, SysTools OST Viewer is primarily a viewing tool and does not support exporting data from an OST file. Users can only view the content within the application.

Boris Weber
I am an editor at UpdateStar. I started as a support engineer, and am now specialized in writing about general software topics from a usability and performance angle among others. I telecommute from UpdateStar’s Berlin office, when I am not working remote as a digital nomad for UpdateStar. When I'm not analyzing the latest software updates, you can find me exploring new cities, immersing myself in local cultures, and discovering innovative tech trends across the globe.
Latest Reviews by Boris Weber
Latest Reviews
![]() |
Splid – Split group bills
Splid simplifies group bill splitting with ease |
![]() |
My Horse and Unicorn Grooming
Enchanting Grooming App for Fantasy Horse and Unicorn Lovers |
![]() |
Bingo Paradise: Cash Prizes
Bingo Paradise: A Fun, Rewarding Bingo Experience |
![]() |
Canasta Card House
Canasta Card House: Classic Card Game Reinvented |
![]() |
F&M Bank-NC
F&M Bank-NC: Reliable Banking with Community Focus |
![]() |
Solitaire Makeover Home Design
Solitaire Makeover Home Design: A Unique Blend of Card Gaming and Home Decor |
![]() |
UpdateStar Premium Edition
Keeping Your Software Updated Has Never Been Easier with UpdateStar Premium Edition! |
![]() |
Microsoft Visual C++ 2015 Redistributable Package
Boost your system performance with Microsoft Visual C++ 2015 Redistributable Package! |
![]() |
Microsoft Edge
A New Standard in Web Browsing |
![]() |
Google Chrome
Fast and Versatile Web Browser |
![]() |
Microsoft Visual C++ 2010 Redistributable
Essential Component for Running Visual C++ Applications |
![]() |
Microsoft Update Health Tools
Microsoft Update Health Tools: Ensure Your System is Always Up-to-Date! |