softaken OST Viewer

Free OST Viewer

Install the freeware to view OST files without installation of MS Outlook

OST stands for Offline Storage Tablethat stores all MS Outlook items including notes, journals, calendars, tasks etc… An OST file can be accessed in the MS Outlook environment. What will happen if you try to open an OST file without MS Outlook? It cannot be opened. If you still to open, install the OST file Viewer. It is a sophisticated program which is free to download. You are not going to pay a penny to install the tool. Use it at free of cost.

  • Allows you to access whole items of OST files including emails, contacts, calendars, notes and journals
  • Free to download (freeware)
  • An Independent and standalone tool, doesn’t require installation of MS Outlook to view OST files
  • Work smoothly, support any size OST files
  • Filter file option to view your desired OST files
  • Support all Windows OS including 8, 10, XP and Vista

Key Characteristics of OST File Viewer

Search Targeted File

A Standalone Application

OST Viewer is a standalone tool, allows users to view emails that exist in the OST file without MS Outlook environment. It means users can view and read OST files without any support of MS Outlook. Easily view OST files during weak or no connectivity with Exchange Server.


Support Whole OST Items

The OST file created by MS Exchange Servercontains important information like notes, tasks, contacts, messages etc.. With OST Viewer, users can able to view whole items of OST files with just a few simple clicks. It supports whole email properties like CC, BCC, To and From.

Import Primary Mailbox

Error Free View

OST Viewer offers error free view. No file is damaged or corrupted when users want to open the selected OST file. It is a sophisticated tool, takes care of your important OST files.

Import Primary Mailbox

Complete and detailed view

Freeware OST Viewer application provides a complete list of OST folders on the left side of the software panel. You can pick the folders of your choice from the left pane and view them completely one by one.

Import Primary Mailbox

Grant any size OST file

The application doesn't create trouble to open any size OST file. You can view any large size OST file using the freeware. The users don't have to fear about the file corruption. Quality and systematic view is provided by the software.

Tools Faq's

No, not a single OST file and its element is corrupted by the software.
OST Viewer can be downloaded easily on any versions of Windows.
No, there is no need to install MS Outlook in your system for running this software.
No, not a single change will be created to OST file and its content by the safe OST reader application.

Software Specifications

System Requirement

ProcessorAny Pentium Class

Operating SystemWindows 10, 8.1, 8, 7 & Other

Memory512 MB Minimum

Hard Disk100 MB of free space for software installation

Software Delivery

ElectronicVia Email


Interface Available

Language SupportedEnglish

Support OptionEmails, Chat & Skype

Client Reviews



  I have a huge pile of OST files and I want to view them. After a lot of struggle, I found OST Viewer and with the help of it, I was able to view these files quickly within few simple steps.  



  The software has only three steps to view all size OST files and it worked quickly with the easily rememberable steps. The whole task got completed in few moments.  


United States

  I have some OST files but could not access these files because now I don't have MS Outlook installed on my system. I was looking for a reliable tool for a long time and finally, I got OST reader tool from one of my friend.  



  It is a highly supportive tool to view OST files completely. I used this tool to view my thousands of OST files and got detailed viewing of these files. Really a big thank to Softaken team for this freeware.