OST Format Parser

How to open OST file without Outlook

ost format parser

How to open, view & read OST file which is corrupted/inaccessible is a common question for all those users who uses MS Outlook email application. It is actually a situation when a user lost his access over OST file because it get corrupted. At this point an ordinary user lost all his trust over Outlook and search another client in order to do his work. But switching from Outlook to another email application is not the solution, then what?

Microsoft Exchange OST files being sensitive files that show synchronization errors due to which users unable to access mailbox data. So, in such situations it become compulsory for them to hire online freeware services to fix and view OST file. In the following guidelines we will make familiar with online solution named as OST File Viewer tool that professionally equipped to solve OST file corruption.

Introduction to OST files

OST files are offline Outlook files that allow users to work in offline mode when internet connectivity with exchange server is not possible. It is cache of data that is saved on Exchange Server's. The benefits to create this cache copy are to reduce the network traffic, facility to work in offline mode and ease the burden on Exchange Server accounts.

OST file comprises of following items

  • Mailbox items such as Emails, Calendars, Tasks, Notes, Contacts and Journals.
  • Secret Items and other overhead
  • Shared folders
  • Public folders

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Causes of OST File Corruption

OST files are very sensitive in nature and are very much susceptible to corruption due to unreliable unexpected reasons. These includes data storage device failures, power failures, networking issues, malware or virus attack, inappropriate shut down of Outlook and other software issues. Ost files when experience any of the issues they starts to behave abnormally. But the most common reason reported in OST files are synchronization error. Users experience some issues and errors in OST file mostly when they synchronized OST file with Exchange Server. One common error message received by user is "Unable to open your default email folders. The file xxx.ost is not an offline folder file".

The above talk over error execute in two situations:

  • The OST file corrupted or damaged and is in unrecognized manner by MS Outlook. In such context when OST file is not recognized by Outlook it will convey this error to users.

  • Sometimes OST file fails to synch with associated mailbox so in such case also it will show this type of error related messages.

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select ost file

open ost emails

view ost mailboxes

How to fix, view & read OST file data

Some users try to fix OST file issues in-built repair tool i.e. scanost.exe, but in some situations it fails to repair OST file data. In such context, users feel protected and adopt freeware online solutions like OST Viewer because these tools include powerful mechanisms to view OST file data completely to users after scanning all items. The tool to fix and view OST file is available free of cost to users, so stop killing or wasting your crucial time in thinking about worth of tool. Simply download it and have required results without investing single penny.

Follow below simple steps to perform further

  1. Launch the application on your system
  2. Browse file/ folder to view OST file
  3. Now easily open & read OST file content

Benefits of the toolkit

Before buying the commercial third party utility, user must keep in mind some points as it would help them in selecting the precise and reliable utility as mentioned below. .ost file parser Windows application should support all Windows operating system. Also maintains the integrity of data.

  • Provide two option Select .ost file and Select Folder
  • Auto detect in-built feature that automatically detect the location and allow to extract OST file
  • Display the preview of OST file
  • Include Right and Left arrow navigation
  • No MS Outlook configuration is needed to view OST file


As business needs are increasing day by day and so the user's requirements to read OST file of Outlook. The above section describes the problem faced by users and a precise way out to resolve the problem that allow to open & view OST file using relevant OST file Parser application.