Sysinfo
OST Viewer

Q: What if my OST files are corrupted, can I still open them with an OST Viewer?

Yeah sure, you can easily view your normal as well as corrupted OST files with this OST File Viewer. The software provides three different recovery modes i.e. Standard, Advanced, and Deep.

Most Efficient Free OST Reader Tool to View and Open Corrupt OST File Without MS Outlook Installation

SysInfoTools OST file viewer is freely available to view, read, or open an OST file without Outlook if it is healthy or corrupted. This freeware program is smart enough to open corrupt or inaccessible files without any hurdles. The software works independently to make you free from any specific or additional requirement to view OST files like the installation of MS Outlook or the live environment of Exchange Server.

Open and view Healthy and Corrupt OST files without Microsoft Outlook and Exchange Server.
Display Outlook mail items including emails, calendars, contacts, notes, tasks and journal entries, etc.
OST viewer is fully compatible with Windows 11, 10, 8, 7, Vista, 2003, XP, and 2000.
Compatible with all Exchange and Outlook versions including the latest 2019.

(Average Rating 4.8 Based on 1527 rating)

Free Download Upgrade Pro

*SysInfo OST File Viewer Tool is a Fully Secured Tool to Download.

Note : Check Pre Installation Guide

Benefits of Free OST File Reader Tool

Reads Corrupt OST files and shows you all the mailbox data.
Auto-detection of the file information before displaying the mailbox.
Three scanning modes for corrupt OST files to deliver the best results.
Exporting the listed data to an HTML file format is possible.
Creation of log file at a user-defined location containing the information of file scanning.
Adds and opens multiple OST files in a single attempt.
Exchange Server environments are not needed to open OST files.
View all emails of an OST file including attachments.
High Compatibility with all versions of Exchange Server and MS Outlook.
DIsplays deleted OST file email items.
Filters OST file email based on dates on which they were received or sent and no Outlook installation is needed.

Award & Reviews

Included with 100% Security Measures, Sysinfo OST Reader stands out as the top-ranked tool in the online market. It is free to use and access unreadable OST data swiftly by any users.

Great and Impressive Software launched by SysInfoTools for a novice user to easily access corrupted OST mailbox items flawlessly. It is made with advanced algorithms so that every user can easily access such tools.

3 Simple Steps to View OST File without Outlook

Launch the Sysinfo OST Viewer ToolDownload and launch the Sysinfo OST Viewer Tool. Select either to add a folder of multiple files and click on Next. Select the Files/Folders Now, select the desired files and folders from the Tree structure format. Additionally, preview the added files and click on the Next button to proceed further. Choose the File Format and Convert Finally, choose the desired file format. Additionally, apply the optional filters and features and click on Convert to initiate the process.

When you can use the Offline OST File Viewer Tool

When users need to View Healthy or Corrupt OST files Data

If a user is struggling with corrupted OST files and is unable to access or view their content, then he/she can try this OST File Viewer for free. It will solve the problem in a minute.

When users need to read OST Files without installing Outlook

If a user doesn’t want to install an Outlook application in his system and look for solutions to read OST file data, then SysInfo OST File Reader will be the best choice.

When users need to open inaccessible Outlook OST Files

If a user wants to open inaccessible OST files of Outlook, then this Sysinfo OST Viewer tool can be used to open such files quickly without any issues.

Important Note: Remember this OST File Viewer is available for free but, if you want to save the recovered OST file items, you cannot do this with this tool. For saving purposes, you have to download OST Recovery Software and avail all the features of it.

Exclusive Features of SysInfo OST Viewer Software

Views OST files without Outlook

SysInfoTools OST file viewer makes it possible to open multiple or orphan OST files without MS Outlook or Exchange Server. You can easily open OST files and view all the mail items like Emails, Contacts, Journals, Task from any time & anywhere.

Opens and Saves OST to HTML

Once your entire OST files come in original form after an in-depth scanning process, you can export them into HTML format. But if you want to save them in Outlook PST format, then you can go for our recently launched product OST to PST Converter

Smart File Viewing

OST file viewing is smartly done by this software without requiring Microsoft Outlook. The entire Email is displayed on the window in which you can view their all meta properties and attached files like images, graphs, and documents.

Opens Corrupt OST File

Free OST Reader is smartly designed to open damaged OST files. You can view the OST files with ease even if they are not invalid states, i.e. corrupt or inaccessible forms. Corrupt or Faulty OST files are thoroughly scanned before being displayed to the users.

Auto-Detection

The auto-detection feature will detect the information of the selected OST file. All you need to do is just check in the Auto-detect box. The detected information includes file type, file version, and compression type

Generate Log File

Free OST file viewer creates a log file to save the information of the scanning process, and the number of files viewed or corrupted. This generated log file is saved in text format at a user-defined location and is very useful to cross-check the results of the software.

In-Depth Scanning

If the selected OST file is corrupt, there are three different modes to execute in-depth scanning: Standard mode to view normal OST files while Advanced and Deep modes are for minor or major corruption respectively.

Exports OST to HTML

Online Outlook OST viewer helps you in saving the entire data files of Outlook OST in HTML format. Via this feature, users can save the mailbox data (emails, contacts, calendar, etc.) of the selected mailbox folders into an HTML file.

Easy to Use-Interface

Wide support and compatibility are provided with this tool that enables users to view OST files created in any version of MS Outlook including the latest 2016. Also, the tool is highly compatible with all major versions of Windows-based operating systems.

Wide Windows Support

Software Specifications

About Product	Version v23.10	License Multiple User	Edition Home, Administrator, Technician, and Enterprise	Last Updated On:- 30 October 2023
Requirements & Supported Versions	Pentium class processor	Minimum 512MB RAM (1GB Recommended)	Disk Space: Enough Space to Store Recovered Output.	Support Windows: 11/ 10/ 8.1/ 8/ 7, 2008/ 2012 (32 & 64 bit)

Supported Links

User's Installation Guide Customization Plan Eula

Additional Information

Comparison of Demo & Full Version

Comparison of OST File Viewer Tool Free Version and Full Version

Product Features	Free Version	Upgrade Full Version
Open & View Data from OST file
Open OST Files Without Exchange Server
Export Items from OST file into HTML file format
View Outlook Offline Emails with Attachments
Open Corrupted OST Files
Auto-Detect Feature
Save Recovered OST Files	Preview Only	Save All Files
Save OST files in multiple formats: OST, EML, MBOX, DBX or MSG	Preview Only	Save All Files
24*7 Tech Support & 100% Secure
100% secure Recovery
	Download	Upgrade Pro

Frequently Asked Questions

Having any doubts while running the SysInfo OST file viewer, check out this FAQ sections, and get your answer immediately

How to Open OST files to read and View its content?

Use Sysinfo OST Viewer to read and view corrupt OST files as follows:

Step 1: Start the software first and open a healthy or corrupted OST file to open.
Step 2: Search the file with the help of search options available in the tool.
Step 3: The scanning process will start and it will show all the mailbox folders in the preview form.
Step 4: You can now open and view required folders like Inbox, Outbox, Deleted Items, Sent Items, Calendars, etc.

Can I open OST files without MS Outlook?

Yes, SysInfoTools OST Reader is a freeware that doesn't require Outlook or any third-party program to view or open the OST files. It lets you open the OST files and view the content i.e. emails and other mailbox data.

What if my OST files are corrupted, can I still open them with an OST Viewer?

Yes, of course, Add the desired files you want to view, the software will open them one by one after closing the previous file.

A Few of my OST files are orphans, can I open them with a Free OST viewer?

Yes, of course, the tool does not require any presence of Outlook or Exchange Server requirement to open or view orphan OST files.

Is this a completely free tool or do I have to pay for it?

No, the OST file viewer is a completely free tool to open OST files without MS Outlook. Simply download the application and read the OST file anytime from anywhere.

Client Review

I've been ironing out some issues with the super-fast and great technical experts of SysInfoTools. This free OST file viewer tool helped me to open multiple OST files within a few clicks. I am fully satisfied with the team’s support and solution. Thanks!

THEODORE VOSS | U.K.

This is the first time when I am writing a review for a provider because I've received satisfactory support from this team. The Outlook OST Reader works the same that I was looking for. Thanks for the great work!

ORVILLE BLACK | SOUTH AFRICA

This OST viewer tool was very precious to me and I recommend this tool to every user who is looking for the free OST file viewer to open, read, and view files without MS Outlook. I will give 5 stars to this excellent tool.

AUBREY BURGESS | THAILAND

I've chosen only SysInfoTools OST Viewer Tool among others because of its potential to open a corrupt OST file, and second I've read about the supportability of the team. These guys are very helpful and professional. Happy to get connected with you guys!

TERESA ANDREWS | HONG KONG