Download Microsoft OST to PST Converter for Free Solution

OST file is Outlook Offline Storage Table file which is created when Exchange Server is synchronized with the Microsoft Outlook application. It includes all the data of the Exchange user mailboxes as a copy and is stored on the system drive location. It helps users to work offline and perform activities like read, send, compose emails which would get updated once it is connected to the network again. Recreate OST files; as a fresh updated copy of Exchange Server data with the help of Exchange Server configuration and Outlook Settings.

Conversion of OST file to PST – Why?

  • Due to OST synchronization issue between Exchange and OST file, data loss or deletion of OST file via virus infection, software and hardware corruptions, human errors in Exchange mailboxes folders, Exchange Server crash down, the OST file data become inaccessible.
  • When a user moves to another location and need to access the OST data from the previous OST location at different place, it would be impossible for him to do that.
  • When Exchange Server is under maintenance and OST data is needed, one cannot access it.

All these situations arises the need for the OST file to PST conversion as it would be a simpler task to access PST file in Outlook for the users rather than relying on accurate and all time Exchange configuration. And there will be no issue to move and use this PST file on another Outlook version on another system as one can easily transfer this PST file to another system through an external device and import it to the email client using its Import/Export feature.

Recommended: Best Free Methods to Convert OST to PST file format

Free Solutions

If you want to convert OST file, then you can do that using Microsoft-provided facilities as well. These services are free and for user’s timely needs. Let us know these services one-by-one.

1st Option – Inbuilt Import and Export Feature in Outlook

This method will export the OST data to the new PST file. Let us see how.

Note: Make sure the Exchange Server is configured in the Outlook application before starting the export procedure.

  1. Open the Outlook application and navigate to File>Import & Export>Import/Export.
  2. Now, in the opened wizard, select Export to a file option and click on Next.
  3. Select the Outlook Data File (.pst) option and click on Next.
    Select the Outlook Data File (.pst) option
  4. Make selection for the individual folder or select all the folders by selecting the root folder of the mailbox including sub folders with the given option “Include subfolders” for conversion and click on Next.
    Make selection for the individual folder or select all the folders
  5. Next, browse and add the destination folder path for saving the new converted PST file and finally, choose option for duplicate files management and click on the Finish option.
    Browse and add the destination folder path for saving
  6. Hence, the OST file mailbox is moved to the PST file format.
2nd Option – Convert OST file to PST using Archive Feature

This method uses the Archive feature in Outlook to move OST data to the archived PST file format. The process is as given below.

  1. Start the Outlook application and open OST file for conversion in it (work in offline mode).
  2. Navigate to File menu, select Info option and then select Clean up Tools option.
  3. Select Archive option from the drop-down list.
  4. Select the option saying Archive this folder for all subfolders and select the mailboxes folder items which you want to convert or archive to PST file.
  5. Using Browse option, enter the path location for the archived PST file and click on OK.
  6. After some minutes, the archiving gets complete and you can view the archived PST file with OST data at the defined location.

Note: Microsoft OST Conversion solution only supports healthy OST files and not suitable for bulk data conversion. Also, these methods include risks of data loss and manual errors.

Download third party tool for free

Find the required steps to convert the Exchange OST file to Outlook PST file in automated manner through OST to PST Converter tool. Download the software from its website.

Download Now

  1. Launch the downloaded & installed free software. On the welcome screen of software, click on Browse option to add the OST file for conversion from the system location. Or, you can find the OST file in specific drive using the Find option in the user-interface of the tool.
  2. Once the OST file is added, click on Scan Now option for scanning the OST file. It will scan and then retrieved all the OST mailbox folders in the tree-structure. You can click on any folder item on the left pane and view its preview on the right-pane easily.
  3. Make selection for the desired folders items and click on Save Converted File option. It will display multiple saving options like to PST, MSG, EML, etc. Select the option as per the requirement; enter the destination location for saving the converted file and click OK.
  4. The conversion process will get start and gets completed within minutes. The converted PST file gets saved at the defined destination location.

Hence, the automated conversion is quite convenient with OST Converter tool. This free version has saving limitations. So, for saving unlimited data, just purchase the tool online via its buy link.

Note: This advanced tool supports both healthy and corrupt OST file conversion to PST file efficiently.

Important Reasons to Choose Converter tool
  • To recover corrupt, orphaned, inaccessible Exchange OST file content
  • To preview recovered OST file mailboxes file items selectively
  • To export desired OST file data to the Outlook PST file format directly
  • To convert any size, encrypted or any version OST file securely
  • To save 20 items per folder of the OST mailbox for free
  • To move OST file content to other file formats like MSF, RTF, PDF, etc.
  • To get converted PST files supported by all Outlook versions including Outlook 2019

In different cases, the user needs to convert corrupt or even healthy OST file format to PST in order to access its data. Microsoft has facilitated some free solutions to convert OST file to PST file which a user can try anytime. For tough situations to handle, when Microsoft methods are not so dependable, the professional Best OST to PST tool is always there.


  1. My search for online free method end with this blog, here I found this amazing free OST to PST converter which is reliable and efficient. Thanks to the creator for suggesting this tool.

  2. The method are so good and easy for application, I do this method and convert OST file to PST format.

  3. Above third party tool is an advanced utility helped me several times to shift OST data to PST format. It can transfer large OST file with attachment to other format. It generates error free results. I am happy to find this amazing tool.

  4. I tried this solution many times and I learned so much from this manual method. I successfully converts single or multiple OST files to Outlook PST format. The blog mentioned every step with all tiny details helped to shift files in the right way and I got the perfect result. Thanks for sharing method.

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