Free OST Viewer Tool box image




OST Viewer Tool

Best Software to open Orphaned Outlook OST Files Data

  • Read All OST Components i.e., Emails, Contacts, or Calendars
  • Preview OST emails with Embedded Objects & Attachments
  • Count Items from each folder & subfolder for Selected OST folder
  • Open Multiple OST Files & Read their Information in Batch Mode
  • Use OST Viewer Tool for All Forensic Investigation & Examination
  • Fully Standalone Application to Read OST files without Outlook
  • Users can check Status of OST Emails i.e., Read/Unread Messages
  • Double Click to Copy & Save OST Emails as Raw HTML File
  • Run Free OST Viewer Software on both Mac & Windows OS

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Why Choose OST Viewer Tool?

Three Steps to Read OST Files Data

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OST Preview

Launch Free OST Viewer software & load files in it by dual ways.

fast email client

Open OST on Mac

Select any of the OST email to read its information with all details.

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Preview Outlook OST

OST Viewer Wizard also allows to read Contacts & Calendars.

Advanced Features of OST Viewer Tool

Know the Easy & Free OST Viewer Tool Benefits

ost viewer tool

Open OST Files without Outlook

Free OST Viewer tool is designed to open OST files without requiring Microsoft Outlook email client installation. You can read all the details like OST emails, contacts, calendars, tasks, notes or journals with this software. It is capable to open the encrypted Outlook messages stored in the OST files without any issue.

export all data items

Preview OST Files with Attachments

This toolkit is designed for the users to read OST emails with all type of inserted attachment files. It will enable them to preview complete detail of emails. All the attachment files will get listed into a separate panel. Users can double click on the file to open the attachment file & preview it without any problem.

maintain folder hierarchy

Read OST Emails with All Details

An Outlook email may contain a lot of details like header information, meta properties, embedded objects, signature, hyperlinks, images etc. The Free OST Viewer toolkit will allow the users to read OST file details with complete information. It will not alter or change the formatting of your emails before making its preview.


Open Multiple OST Files in Batch Mode

This toolkit provides users to a batch mode to open multiple OST files directly in the application panel. You can load OST files in the utility panel by dual ways using Add Files or Add Folders. A user can browse for the source folder location of OST files. You can load the files one by one or multiple OST files directly from a folder.

free ost viewer

Analyze OST Files for Digital Forensics

A user can analyze OST files for the digital forensic purpose. This tool will display all the required information in its panel. It is capable to provide preview of both UNICODE OST files or ANSI OST files. Forensic experts can read the Password Protected, Encrypted or even corrupted OST files directly from the tool.

ost file viewer

Open OST Files of Any Size

OST File Viewer can open OST files or any size without any limitation. A user will not face any problem while trying to open OST files due to oversize. The OST Viewer utility is compatible with both Mac & Windows OS. User can run it on both OS without any platform dependency & read the OST file information.

Watch Full Video of Free OST Viewer Utility

Guidelines of OST Viewer Software

The Video tutorial to know how OST Viewer Tool works and read all components i.e., Emails, Contacts, and Calendars. It support both Windows & Mac OS as well.

Meet all System Requirement for the working of Free OST File Viewer Software.

  • Install and run the RecoveryTools OST Viewer Tool.
  • Now, click on Next and select the configured Outlook mailbox data.
  • Select the OST File/ Folder(s) having OST Files.
  • Finally, hit on stop to successfully complete the conversion process.

Download OST File Viewer Tool - Specification

Know Specifications to Install the Product on your Windows & Mac OS

Software Download

File Size:2.71 MB


System Specifications

Hard Disk Space
Minimum 30 MB Space


Pentium II 400 MHz

Operating System

  • Windows 10, 8.1, 8, 7, Vista, XP etc Windows Server 2016, 2013, 2000

Electronic Delivery

RecoveryTools OST Viewer Tool will be delivered automatically. After your payment is confirmed, you will receive an email with a link to download the product and the activation key.

Frequently Asked Questions

The OST Viewer software is designed with advanced algorithms to help users in easily opening the OST files.

  1. Launch the software to open OST files.
  2. Load OST files in it by dual ways. Browse to the source OST file location.
  3. Choose any of the desired OST mailbox folder & click on the email to read it.
  4. A user can read all the information of an OST email, contact or calendar.
  5. Users can also preview the inserted attachment files with the OST emails.

Yes, a user can open the Outlook OST files using RecoveryTools OST Viewer tool. This application is available for free of cost. You did not need any advanced technical knowledge to use it on your computer.

OST file is an Outlook data file created when working with Exchange Cache mode. But, when the mailbox is not connected with Exchange or in an offline mode, then the OST file is termed as Orphaned OST file. You can open this file in your computer using Free OST Viewer Software.

Yes, this software has Add Folder option. This option will allow the users to load multiple Outlook OST file & read the information.

Yes, you can open the OST files on the Mac OS also to read the emails information.

What Do Clients Say?

I want to open the Orphaned OST files stored in my hard drive, but didn’t really have idea how to do that. Hence, I decided to use RecoveryTools OST Viewer Wizard. I can only say that it is a great application to forensic analyze my OST files deeply. It works in a completely standalone environment without Outlook.

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Jessica, Poland

I was worried about how can I read my clients emails stored in the OST file. Thankfully, using RecoveryTools OST Viewer software I got access to the OST emails. It gives me option to preview OST emails, contacts & even calendars items directly in its panel.

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Hannah, Brazil

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