• Stellar OST to PST Converter

Stellar OST to PST Converter

Perform secure conversion of OST files to Outlook-importable PST files


Professional OST conversion tool that easily converts objects in an OST file into PST format and exports them to a newly created PST at user-specified location.

  • Converts emails, contacts, notes, calendar entries, and journals
  • Preview of converted messages in a three-pane structure
  • Saves the converted mail messages as MSG, EML, RTF, HTML, and PDF formats
  • Easy arrangement of scanned messages based on From, To, Subject, Date, Type, Attachment, and Importance
  • Supports MS Office 2016, 2013, 2010, 2007, 2003, 2002 (XP), 2000
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Key Features

Stellar OST migration tool performs a safe conversion of your Outlook OST to PST file without altering the email text formatting and the original folder structure of your mailbox. Some remarkable features of the software are as follows

Convert OST to PST icon

Convert OST to PST

Stellar OST to PST converter extracts every mail component present in your OST file and restores them to a new PST file. This tool can effectively convert emails, contacts, attachments, notes, journals, calendar entries, etc. Read More

Preview of Mail Objects icon

Preview of Mail Objects

Software provides smart preview options of all the converted mail objects in a similar three-pane structure. The preview window shows the emails, calendars, contacts, tasks & journals are presented in a very professional manner.

Safe and Risk-Free OST Conversion icon

Safe and Risk-Free OST Conversion

The software ensures precise OST to PST migration by averting all possible risks of loss of formatting and other mail attributes. It also places a counter against each mail folder to display the number of converted items.

Save Individual Mails as EML or MSG icon

Save Individual Mails as EML or MSG

This OST Converter allows you to perform an extensive search of specific emails after the scanning based on parameters, such as 'To', 'From', 'Subject', and 'Date'. You can select the desired emails and save them either as EML or MSG files.

Sort and organize Mail Messages icon

Sort and organize Mail Messages

After the OST file is scanned, the software gives the option to organize the different mail message on the basis of Date, From, To, Subject, Type, Attachment, Importance, Show in Groups etc

Save Converted File at Desired Location icon

Save Converted File at Desired Location

The advanced 'Save' option of this OST file repair tool gives you the privilege to save your converted file at a desired location in your system or on any network disk recognized by the operating system.

Support and Compatibility  icon

Support and Compatibility

MS Outlook: Support for MS Office 2016, 2013 (32 bit version and 64 bit versions), MS Office 2010 (32 bit and 64 bit versions) / 2007 / 2003 / 2002 (XP) / 2000

Stellar OST to PST Converter - Technician icon

Stellar OST to PST Converter - Technician

Here is the Advanced OST to PST Converter – Tech, a must for all administrators and technicians who deal with the frequent need to of converting OST to PST file. In addition, the tool is capable of compressing or splitting the converted OST file at the time of saving it based on various criteria. Also, you can export the converted file to Live Exchange Server and can save all contacts in CSV file. Read More…



With the demo version of the software, you can save only 20 items per folder. However, in order to save all the converted items, you need to purchase the full version of the software.

Stellar OST Converter allows finding the desired emails in your converted OST file and saving each email either as an EML , MSG, PDF, RTF and HTML file formats at any user-specified location in the system. You should follow the given procedure to find and save specific email messages using the software:

1. Once the scan is completed, click 'Find' button on the tool bar. The 'Search Messages' dialog box is displayed on the screen.

2. Click 'Mail' > 'Data Files'.

3. Specify the following search criteria in the dialog box:

  • To: Specify a part of the recipient's email address or the complete email address. You can separate the email addresses of different recipients using ';'
  • From: Specify the email addresses of senders. You can separate individual entries by a ';'.
  • Subject: Specify the subject property of the emails you need to find. You can provide a few characters, words, or the complete subject line of the email.
  • Date: Check the 'Select Date Field' check-box and specify the desired date. This will help to find all the emails sent or received on this specific date.

4. In the same dialog box, click 'Find Now'.

5. The software initiates the search process and displays all the found emails in the bottom pane.

6. When you right-click an email in the search results, multiple file saving formats will be displayed Choose the desired option to save the email in the respective format.

Yes, Stellar OST To PST Converter allows you to search for Offline Folders (OST) files in any folder, sub-folder, or drive in your system. You can use the 'Find Outlook File' option of the software to locate OST files in the selected drive and choose the desired file for conversion.

You may require migrating from OST file to PST in any of the following cases:

  • Your mailbox on the Exchange Server is deleted accidentally and you need to access your emails.
  • You are facing issues while synchronizing MS Outlook with Exchange Server.
  • You need to carry your business emails to a different workplace or organization

The time required by the software to perform ost to pst conversion heavily depends on the size of your OST file. The software efficiently scans your OST file and tries to deliver the best performance with reliable and accurate results.

For importing your PST file into MS Outlook, follow these steps:

  • Start MS Outlook.
  • On the 'File' menu, click 'Open' and then select 'Outlook Data File'.
  • Choose the PST file you need to import and click 'OK'.
  • After the process is completed, you will see a second personal folder named 'Stellar Phoenix Outlook PST Repair' containing all your mail folders.

Stellar OST to PST gives the option to save the converted OST file in MSG, EML, PDF, RTF or HTML formats.

Rating & Reviews


4.6 out of 5 stars


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User Comments

Stephen Decosta


I'm completely impressed with this Stellar OST to PST conversion tool which not only allowed me to recover all my important emails from my corrupt OST but also restored deleted emails as well. Thanks to Stellar for coming out with this amazing OST to PST converter.

Richard Jones


I just want to say one thing about this converter - whenever you face any problem with Outlook OST, whether it is related to errors or corruption, or the OST becomes orphan, you can trust this utility and the issue will be resolved surely

Ryan Almeida Goncalves


Last week, my Outlook abruptly stopped working and started throwing error whenever I try to open it. OST file got damaged and had no choice other than repairing the OST file as I need to access my emails on urgent basis. I tried this converter and nevertheless, successfully extracted all the data present into OST file and saved them into PST file, which I imported back to Outlook and regained access to all the mails again

Ancelina Deserres


Tried many OST conversion software but all of them frustrated me with the result. Not even a single software worked as marketed. After trying many, I decided to give a shot to Stellar OST converter and it really worked, exported data from password-protected OST to a working PST magnificently which others couldn't do

Albert Hall


This converter is simply great. I have used demo versions of some other converters earlier but was not satisfied with the result, so I took the last chance of using another tool and tried Stellar's converter. Initially I tried its demo version to check its credibility and was satisfied with the result, so bought the full version. It exported each and every mailbox items present in my orphaned OST to a new PST.

Freddie Simpson


I tried Import-Export Wizard of Outlook but it didn’t work for me as most of the important emails were missing. I needed to convert ost to pst on urgent basis, so without giving a second thought I decided to go with third party software and upon someone’s recommendation I gave a shot to this software and this converter converted my ost file to pst with all data intact.

Wissam Fleur


No software converts the ost file into pst as swiftly as this tool does. Even I repaired an oversized corrupt OST file and saved data as PST, the software hardly took few minutes and my pst file was saved at the desired location. So good!

Alicia Henry


Stellar OST to PST converter tool is one of the most efficient and reliable tools that you can trust for your important data conversions. It assures you to convert all the components of the OST file. I will highly recommend it to those users who need OST to PST converter professionally, as it is very accurate and reliable

Javier Bossé


Very quick software, I can’t believe it takes less than one minute to convert 2 GB OST file! Moreover, its other features are quite useful as well.

John Marc Aldrich


It converted a 15gig ost file with very few errors. Occasional corrupted directory but all notes/calendar and contacts transferred without issue
Highly recommended

Alex Caffary


The software chewed through the OST file incredibly fast even though it was 5.5GB in size. The whole process of extracting to the PST file took under 1 hour

Matthew Lew


Tried the demo version to open the inaccessible ost file, and the software shown preview of all the mail items in the best possible way. Just encountered the error, which their tech support team helped me to resolve and after then I was able to recover my important data on time. Thanks stellar team

Hayden Anthony


Finally, I’m done here! Tested several software over last few days but this is what fits in our requirement. Reliable as well as affordable.

Marc Fournier


Bunch of advanced features rather than just ost to pst conversion. Of course Stellar OST converter is there for exporting ost file data to PST, but later I noticed it can be used more than just as an ost file converter as it offers many more useful features. Go for tech version if you wish to have features like Office 365, compact, split etc...!

David Feliciano


My OST became orphaned due to the lost connection with Exchange Server. I converted my OST to PST and was able to re-establish the connection again


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