OST Viewer

View your corrupted OST files by using free OST Viewer

rating[User Rating 4.9]
OST Viewer Box
  • Open and view OST files without using Microsoft Outlook and Exchange Server.
  • View or show emails, calendars, contacts, notes, tasks and journal entries, etc
  • Force the corrupt OST files to be opened to read the mailbox data.
  • File information can be auto-detected before the mailbox display.
  • Three scanning modes are designed for corrupt OST files.
  • The listed data is exported in an HTML file format.
  • Log files are generated at user-preferred locations that store the information of the file during scanning.
  • It is supported by Windows 10, 8, 7, Vista, 2003, XP, and 2000.

Salient Features of Free OST Viewer


Open and view OST file without installing Outlook

Open and view OST file without installing Outlook

Mail Converter OST file viewer helps you to open multiple or orphan OST files without installing MS Outlook or Exchange Server. You can open and view all the OST files and mail items like Emails, Contacts, Journals, Tasks, etc.

View Smart File

View Smart File

You can view OST files by using this software without installing Microsoft Outlook. All Emails are shown on the window in addition, you can also view their all meta properties and attached files like images, graphs, documents.

Auto-detection facility

Auto-detection facility

The auto-detection feature will help you in detecting the full information of selected OST files by checking the Auto-detect box. The detected information mainly contained file type, file version, and compression type.

Create Log File

Create Log File

OST Viewer generates a log file that usually saves the information of the scanning process, and a number of files viewed or corrupted. The generated log file is saved in text format at the user-preferred location and very essential to review the software results.

Easily handle

Easily handle

OST viewer is created for both technical and novice users so that they can use this tool easily. The interactive user interface of this tool doesn't require any help from a technical expert.

Open and Save OST to PST

Open and Save OST to PST

After full deep scanning, when your entire OST files come in the original form then you can export them into HTML format. But if you want to save all your OST files in Outlook PST format then you have to buy OST to PST Converter.

Open and view Corrupted OST Files

Open and view Corrupted OST Files

OST Viewer is specially designed to open corrupt OST files. You can easily view the OST files even if they are in a corrupt or inaccessible form. These corrupted OST files are fully scanned first before viewing them to the users.

Complete Scanning process

Complete Scanning process

If your chosen OST file is corrupted, then there are three different modes by which you can perform a complete scanning process; these are - Standard mode to view normal OST files while Advanced mode for minor corrupted OST files and Deep mode for major corrupted OST files.

Export OST files in HTML format

Export OST files in HTML format

Online Outlook OST Viewer saves your entire data files of Outlook OST in the HTML format. Users can save their mailbox data (emails, contacts, calendar, etc.) of the chosen mailbox folder into an HTML file by using this tool.

Highly compatible with MS Outlook and Windows

Highly compatible with MS Outlook and Windows

This tool offers wide support and compatibility to its users to view their created OST file in any version of MS Outlook including the latest 2016. This tool is highly compatible with all major versions of Windows-based operating systems.

Free vs Full Version

Product Features Free Version Full Version
Open and View Data from OST file
Open OST Files Without Exchange Server
OST file export its items into HTML file format
View Outlook Emails with Attachments
Open Corrupted OST Files
Available Auto-Detect Feature
Save Recovered OST Files
Save OST files in different formats: OST, EML, DBX or MSG, etc.
24*7 Tech Support & 100% Secure
Price Free $69

Money Back Gurantee

Feel Free to Purchase Products! We are committed to 100% customer satisfaction & security and thus we provide 30 days money-back guarantee. View Details.

Software Specification


Here is given the OST Viewer specifications, users can follow before use of this software for ease working:-

For Windows:
  • Processor: Pentium Class Processor
  • Memory: 512 MB RAM (1GB recommended)
  • Operating System: Windows 11/ 10 / 8.1 / 8 / 7 / Vista / XP /2000 / 98 /NT / 95.
  • Disk Space: Enough disk space to store data

The Demo version of the OST Viewer comes with only one limitation: it exports (Each folder) from the chosen files. Thus to overcome the limitation of the demo version, Viewer for the full licensed version of the utility.

Home License -Only for personal or single usage, not for corporate purposes.

Corporate License -Suggested for large Enterprises, Government organizations, and educational undertakings.

Technician License -Recommended for the technocrats or administrators who offer their services to other clients.

Frequently Asked Questions


Having any doubts while running the OST Viewer, check out these FAQ sections, and get your answer immediately.

No, it is freeware and you don’t need to have MS Outlook or any third-party application to open and view OST files. You can use the OST Viewer to open and view your OST files.

Yes, you can easily access your OST files by using this tool. It also has three recovery modes i.e Standard, Advanced and, Deep.

Yes, you can open more than one file at the same time.

Yes, you can as it doesn’t need any Outlook Exchange server to open your orphan OST files.

No, it is fully free to use. You just have to download the software and then you can read it anytime.

Software Review

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Software Suggest

Software Suggest titled this utility as the best and top-notch OST Viewer software as it allows users to convert bulk no of OST files due to its simple interface.

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Soft32

Online OST Viewer Software got a 5-star rating from Soft32 for its safe and quick BKF Recovery with 100 % data accuracy. Along with that, the software provides the best services with 24*7 support to the users.

Client Review

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