Convert OST to PST

An Easy Solution for How to Convert OST File into PST File

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Watch How to Convert & Migrate OST to PST, EML, MSG & Office 365

Overview of OST to PST Converter Tool

  • Recover data from damaged or corrupted OST files
  • Export OST to PST, MSG or EML files as per your convenience
  • The most preferred tool by Digital Forensics experts
  • Support to convert OST to PST file of MS Outlook 2016 & Below versions
  • Split the resultant Outlook PST file into multiple parts as per size
  • Recover permanently deleted emails from OST file
  • Convert OST file to PST without Installation of MS Outlook
  • Apply Mail filter to Export emails from OST to PST of selected dates
  • Allow OST to PST file conversion without any file size limitation
  • Attuned with Windows 10 and all its below versions

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Convert OST to PST with Advanced Features of Software

Recover Data from Damaged OST File

Free OST to PST converter proficiently recovers all the data from damaged OST files. These data include Outlook OST email messages, attachments, contacts, calendar items, tasks, notes and journals.

Meta Data of Emails is Retrieved

This OST to PST conversion utility tool holds precise properties and information of all OST items during conversion like subject, cc, bcc, sender's detail, attachments date and time etc.

Supports OST Files Created in Any Version of Outlook

OST Recovery Tool is able to Open, view and recover the OST files created in any version of Microsoft Outlook like 2016, 2013, 2010, 2007, 2003 & 2000.

Split the Resultant PST File

While exporting Outlook OST file to PST, The Software provides the option to convert OST to PST file and split the large sized resultant PST files by size(MB/GB), as per your requirement.

Export to Office 365 Account

Ost to PST converter migrates OST data direct to Office 365 account by configuring Office 365 settings using Software's Advanced Settings.

Export OST Emails in PST, EML or MSG

The software not only recovers data from damaged oversized OST files, also it converts OST into multiple files (.PST, .EML and .MSG).

Export Selected OST data to PST using Mail filter

While exporting Exchange OST to Outlook PST, EML or MSG formats, you can apply the date mail filters to select the emails within a date range that need to be exported.

Get Export Report

After the conversion from OST to PST, the software automatically generates a report that you can save on your system and view it. The report is in .csv file format.

How to Convert OST File into PST File?

Screenshots of OST to PST Converter Software

Watch How Free OST Converter Works

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Product FAQs

A: Yes, Software can easily process OST file which is created in Outlook 2016 and able to export OST data to PST file.
A: Yes, Once the OST file is successfully loaded into OST to PST converter, It scans the corrupt OST file for recovery and repair damaged OST file, if their is any corruption in OST file. One can choose Advance Scan option for the recovery of highly corrupted OST file.
A: Yes, this Exchange OST to Outlook PST converter can easily work on windows 10, 8.1 and all below versions.
A: Yes, This free OST to Pst Converter can also perform recovery of permanently deleted emails of the OST file.
A: Yes, you can export data from OST file to PST file without having MS outlook environment, but to view PST file data, you need to have MS outlook environment.
A: Yes, the OST converter can split the source OST file into multiple PST files by size.
A: Yes, this Exchange OST to Outlook PST connverter does not harm the internal structure of the folders in the OST file and maintains the folder heirarchy according to source file.
A: Yes, using OST to PST converter software you can export selected emails. In export options, you can select the emails which you want to export and then right click > Export or you can choose the mail filter option to export the emails from selected date.
A: Yes, OST converter not only converts OST into PST, it can also convert OST file into EML and MSG file formats.
A: Yes, Software is capable to migrate all OST file items to Office 365 account directly.
A: It seems similar but there is a quite difference between the corrupted OST file and an orphaned OST file.

When OST File Becomes Corrupted?

There could be several reasons for corrupt OST file, Some of them are as follows:

  • Hardware Level Corruptions: Hardware related issues, mostly occur due to improper configuration of an external component which could be a hard drive, virus, a synchronization of OST file due to bad network connection.
  • Power Interruption: Sometimes, while OST file sync with Exchange Server and the sudden power failure could be the cause of the damaged OST file.
  • Software Issues: The OST file can also become corrupted or inaccessible due to bad shutdown of Outlook while OST syncing with Exchange Server or virus infections.

Reasons Behind Orphaned OST File:

Whenever an OST file is created in Outlook, it contains an encrypted token, that is associated with the configured account which is used to create that particular OST file. Next time, when the account changed with a different email service like gmail, yahoo etc, then the token associated with OST file becomes no longer with old account and the Outlook will not able to recognize that OST file. In such situation, the OST file becomes orphan and there would be no workaround exists.

How to Repair Damaged OST file and Access Its Data?

After MS Outlook 2010 and later releases, you can repair a corrupted OST file by deleting and re-downloading the OST file from Exchange Server. Similarly, the damaged OST file of previous versions of MS Outlook 2010 can be fixed by Outlook OST integrity checker (scanost.exe). But, there is no recovery guarantee of highly corrupted OST files, as it fixes minimum corruption issues. Also, it will not be useful for fixing orphaned OST file issues. Hence, there is no workaround to convert orphaned OST file to PST file using scanost.exe.

On the other hand, to quickly repair the damaged OST file or access orphaned OST file data, this OST to PST converter will help you in recovery of corrupted as well as healthy OST file. Also, the tool is capable to convert orphan OST file to PST format without MS Outlook environment.

Overview of Outlook Data Files

What are the Differences Between OST and PST Files?

Difference Between OST and PST

If you are Microsoft Outlook user, then it is important for you to know that all emails, calendar, contacts, tasks, and other data items are saved on a local system, on a mail server, or both. Moreover, MS Outlook data items that are stored on the system are named as Outlook Data File with both .pst and .ost file format. Now, why there are two file formats to save data? What exactly the difference between PST and OST files used in Outlook? To resolve all such queries, a deep comparison of OST vs PST is done here.

In MS Office Suite, Microsoft Outlook is the widely used application among the business users. It is an email client that allows users to exchange information in an organization using its mailing service. Apart from this, other available services are contacts, calendars, tasks, notes etc. Now, to store all data items there is two type of file format supported by Outlook i.e. PST and OST file format. PST file format is created for each user account configured in Outlook to maintain copies of emails, contacts, calendars, tasks, notes etc. If Outlook is connected with Exchange Server, then all items are delivered to and saved on the server. However, if a user wants to have access to data when not connected server, then OST file or Offline Storage Table is stored on the system.

Both OST and PST files are data files of Outlook but they are completely different from each other in many ways. Thus, to understand both in a better way, the difference between OST and PST is done in the following section of the blog.

OST File PST File
Offline Storage Table is commonly known as OST file of MS Outlook. It is created by Microsoft Exchange that holds all offline copies of each data items in MS Outlook such as emails, entries in calendar entries, notes, tasks, contacts and much more PST basically stands for Personal Storage Table. Microsoft Outlook store all data items i.e. emails, contacts, calendars, tasks, etc., of the mailbox in PST file format.
It is generally a replica of Server folder which can also be called as slave replica of Exchange Server. It is standalone and self-contained file format, which represent how messages are stored in MS Outlook displaying an arbitrary hierarchy of all folders.
OST files can only be accessed through the MAPI profile that created it originally. Whenever it is created with the POP3 account, OST file is created. Moreover, can access in any other Outlook profile also very easily.
One can easily access OST file when Outlook is connected to Exchange Server. Using this, one can easily edit, compose or delete email messages in offline mode. It gets synchronized automatically whenever a connection is established again. One can store PST file of Outlook anywhere on the system that can easily used as a backup and move to another system if a user wants.
One can easily use OST file folder when there is no internet connection. PST file folder cannot be used in limited or unreliable connection area.
OST file default location:
  • Windows 7 & Windows Vista:drive:\Users\user\AppData\Local\Microsoft\Outlook
  • Windows XP: drive:\Documents and Settings\user\Local Setting\Application Data\Microsoft\Outlook
PST file default location:
  • Windows 7 & Windows Vista:drive:\Users\user\AppData\Local\Microsoft\Outlook
  • Windows XP: drive:\Documents and Settings\user\Local Settings\Application Data\Microsoft\Outlook

The main purpose of OST file is to allow users to work in an offline mode. It is mainly used by the users who want to keep their data safe and secure. If one is not connected with the Exchange Server, then also with the help of OST file one can work offline and work gets synchronized automatically when the connection is reestablished. Moreover, in the case of corruption in Exchange Database, a user can recover data from OST file saved on the drive. On the other hand, Personal Storage Table and PST file allow users in increasing the storage. It is the file that can easily be backed and can be accessed on any other computer also. In the case of large size PST file, one can easily split the PST file by date, year, size and much more. It helps users in managing their Outlook mailbox in the more synchronized way and prevent corruption.

Final Word

Most of the users using MS Outlook are confused about the difference between OST and PST file. Therefore, after understanding the requirement of the users, the major difference between PST and OST file in Microsoft Outlook is covered above. All this above discussion helps users in understanding the exact difference between the features and facilities offered by the both file format i.e. OST and PST files in Outlook.

What Client Says about OST Converter?

Mike, Ireland


I have been using this OST to PST converter software since last year and I haven't found any better solution than this. I think this is the perfect solution for recovery of data from OST files.

Neo, Germany


This OST PST converter not only recovered my email messages but also provided me with contacts, attachments, calendar items and notes too. Thank you for the pleasant support. I am most satisfied.

Jacques Parado, Hong Kong


This software gives me unbelievable results and great technical support for exporting my encrypted or orphan OST mails to PST files. It secures my folder sequence and organizes it with same arrangement in PST.

Mark, Poland


I was using Outlook 2016 and I just needed the January and March month's sale report from my corrupt OST file of Outlook 2013. I ran scanost.exe but it didn't repair damaged OST file completely as per my expectations. Then I tried this OST recovery tool, firstly it repaired my corrupt OST file efficiently and then it converted my OST to PST file. I was able to export January and March months’ data using the select export feature of this amazing utility.

Albert, Sydney


An excellent utility for permanently deleted emails, I had successfully recovered my 10k emails in which some of them were very crucial, had accidentally deleted in a bulk action. Rated 5 out of 5.

Alex, California


the working of this tool proves that there is a way to convert OST to PST file format which doesn't require MS Outlook installation.

Martin, USA


Although I can export OST to PST manually but the file has become Orphaned and I needed to fix it first. I asked on forums for its solution and I got the recommendation of this tool from there and now I have successfully converted orphaned OST file into PST format.

Eduardo, France


While searching for OST to Office 365 migration methods on YouTube, I watched the above video and impressed with the working of this tool and downloaded this software for testing on my own OST file. After checking the functionality of this tool, I would like to recommend this tool to everyone who wants to migrate OST data to Office 365 account.

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