Free Techniques to Convert OST File to Online PST

  •   Written By
  • Published on
    July 17th, 2019
  • Updated on
    July 12, 2022
  • Read Time
    4 minutes

MS Outlook usually stores its cached data in an offline mode on a local machine in the form of OST file. Any amendments made in the offline files results in the change on the online MS exchange server later when an online connection is established. In case of an exchange server crash, the offline OST files remain unaffected and the data can be restored later. So for restoring Offline mailbox items, you need to convert OST to PST and upload OST files on the Outlook server.

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Need of OST to PST Conversion

  • Accidental deletion of Emails on the Exchange Server.
  • Taking Backups of Exchange Mailboxes.
  • The user wants to fix issues of an OST file.
  • Exchange Database files become inaccessible and the user wants to restore them.

Free Techniques to Convert OST Mailbox to PST File

I’ll discuss the various methods of OST to PST conversion which will help you to upload all offline data into your Outlook account.

Export Offline Mailbox as PST

First, you must log in into your Outlook account using the exchange server from where the OST files have been created and export OST to PST follow the steps given below:-

  • In the File tab click on Open & Export and then select Import/Export
  • Now, Click on Export to a File and then click on Next Button to Continue.
  • Select Outlook Data File (.pst) option and then click on Next.
  • Select any Folder(s) which you want to export and then click on Next.
  • Now, you should Browse the Location where you want to save the PST Files and select the appropriate option for Removing or Adding Duplicates items.

You can also apply a password to the newly created PST file for security reasons.

Try Archiving to Convert OST file to PST

Archiving option saves the items of an OST file into PST file format in the archive folder. Enabling the archiving option will enable you to save Offline Mailbox data in the archive folder and to implement this option follow the steps given below:-

  • Open Outlook application and go to Options under File
  • Go to Advanced Settings and Click on Auto Archive Settings.
  • Select the Number of Days on the intervals of which Auto-Archiving takes place.
  • Browse the Location where the email has to be saved and click on OK.

After configuring the above settings, the Outlook Application will archive the emails on the preferred location on the intervals of Days mention by you.

Convert OST to PST without MS Outlook

The only possible way to save OST as PST without an exchange server accounts it OST to PST Converter by Sysinfo. This is a professional tool embedded with a lot of features which will definitely help you to export OST to PST without losing a single data from the file. If you are having less than 25 emails then you can convert them for free. The intuitive GUI will make much easier for you to turn an OST file to PST.

Export OST Mailbox to PST without any Technical Expertise

  • Download and then Launch OST to PST Converter Software.
  • Click on Open button and then Browse the OST file which you want to Convert.
  • The Scanning Process will start and you will be able to view all the Mailbox items of the OST file.
  • Select the Mailbox Items which you want to save and then click on Save Button.
  • Choose the location where you want to save the OST files as PST.
  • Now, the Saving Process starts and you can see the progress on the Screen.
  • After the completion of the saving process, you’ll receive a Confirmation Message.

Finally, you have converted all Mailbox items of an OST file to PST.


Well, for OST to PST conversion you can follow the manual methods as well but they are complicated for a novice user. It is totally up to that which method of conversion you follow and save offline mailbox to PST. If you are using the OST to PST Converter software then you must forget the risk of data loss because this software never fails to convert every single item of OST to PST. I hope you liked this article.

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