OST File Viewer

Free OST Viewer to Open Corrupt OST File Without Outlook

User Ratings :   (Average Rating 4.8 Based on 174 Reviews)


OST file viewer

Norton Seal windows 10 compatible

SysInfoTools OST file viewer is freely available to view, read or open OST file without Outlook, be it normal or corrupted. Yes, the free OST viewer is smart enough to open corrupt or inaccessible files without any hurdles. The software works independently in order to make you free from any specific or additional requirement to view OST file like installation of MS Outlook or live environment of Exchange Server. Anyone can download this free OST file viewer to read Outlook mail items like emails, contacts, calendar, task etc and saves them in HTML format.

  • Open and view OST files without requiring Microsoft Outlook and Exchange Server.
  • Displaying of emails, calendars, contacts, notes, tasks and journal entries etc.
  • Enforcing corrupt OST files to be opened to read the mailbox data.
  • Auto-detection of the file information before displaying the mailbox.
  • Three scanning modes for corrupt OST files to deliver best results.
  • Exporting the listed data to an HTML file format is now possible.
  • Creation of log file at user-defined location containing the information of file scanning.
  • OST viewer is fully compatible with Windows 10, 8, 7, Vista, 2003, XP and 2000.

Download Now
 money back gauranteesysinfotools software sale

Key Attributes of OST File Viewer Software

Open OST without Outlook
Open OST file without Outlook

SysInfoTools OST file viewer make 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 anytime & anywhere.

OST Viewer
Open and Save OST to PST

Once your entire OST files comes in original form after 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.

ost file reader
Smart File Viewing

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

Open Corrupt OST Files
Open Corrupt OST Files

OST file viewer is smartly designed to open corrupt OST files. You can view the OST files with ease even if they are not in valid state, i.e. corrupt or inaccessible form. Corrupt OST files are thoroughly scanned before being displayed to the users. Read 11 Methods to fix "Outlook Not Responding" Error.


The auto-detection feature will detect the information of 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

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 file while Advanced and Deep modes are for minor or major corruption respectively.

Generate Log File
Generate Log File

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

Export to HTML
Export 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 selected mailbox folder into an HTML file.

Easy to Use
Easy to Use

OST file viewer is designed for both technical and non-technical users who can use this tool with ease. The interactive user interface of this tool doesn't require any prior technical expertise.

Wide Support
Wide Support

Wide support and compatibility is provided with this tool that enables users to view OST file 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.

SysInfoTools OST File Viewer can be useful in the following scenarios:

  • To open, view and read OST files' mailbox items without having MS Outlook.
  • If you want to view corrupt OST files, it will help you view the files without repairing them.
  • It is helpful if you are looking for a freeware program to view OST files.

Important Note: Remember this is just a file viewer tool, so you cannot save your mailbox data. In order to save mailbox data of a corrupt OST file, you need to switch to OST Recovery tool of SysInfoTools Software.

Frequently Asked Questions

Can I open OST files without MS Outlook?

Yes, SysInfoTools OST File Viewer 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, still i can open them with OST viewer?

Yeah sure, you can easily view your normal as well as corrupted OST files with this OST File Viewer. Software provides the three different recovery mode i.e. Standard Advance and Deep.

Can I open multiple OST files at the same time?

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

Few of mine OST files are orphan, can I open them with Free OST viewer?

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

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

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

Trusted By:

capgeminii   texas instrument.   staffordshire   sbcounty   siemens More Clients

Client Reviews


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 the multiple OST files within a few clicks. I am fully satisfied with the team support and solution. Thanks!

- Theodore Voss, U.K.

This is my first time when I write any review for a provider because I've received the satisfactory support from this team. The Outlook OST file viewer work exactly same that I was looking for. Thanks for a great work!

- Orville Black, South Africa

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

- Aubrey Burgess, Thailand

I've choosen only SysInfoTools OST File Viewer Tool among others because of its potential to open corrupt OST file and second I've read about the supportability of the team. These guys are really very helpful and professional. Happy to got connnected with you guys!

- Teresa Andrews, Hong Kong

At Service Since 2010
Trusted by Millions
SSL Secure