• Stellar OST to PST Converter

Stellar OST to PST Converter

Convert your offline OST to PST file with OST Converter Tool to get back your Emails


OST to PST Converter Software helps you to convert inaccessible OST file to PST files which become usable in MS Outlook.

  • Risk-free conversion of emails, contacts, calendars, notes & Journals
  • Supports conversion of encrypted OST file to PST file
  • Free preview emails & calendars before actual conversion
  • Save the converted emails in MSG, EML, RTF, HTML, or PDF formats as well
  • Compatible with MS Office 2016, 2013, 2010, 2007, 2003, 2002 (XP), 2000
  • Converts OST to PST up to 20 emails per folder for Free
  Buy Now

*Free Download enables you to preview the converted file and save 20 items per folder.

Next of Windows

This conversion utility is one of the most competent and reliable tools that you can trust for your vital data conversions



Stellar OST to PST Converter is efficient in conversion of OST file to its corresponding Outlook PST file in an organized and reliable way


Problems & Solutions

Hardware Failure icon

Hardware Failure

OST files become inaccessible in case if there is a data storage failure, for example, the drive got bad sector and your OST File is stored in that sector. Also, Network failures happened while synchronization process leads to OST corruption. You can use Stellar OST to PST Converter Software to access your emails by converting OST files into PST files

Synchronization Error icon

Synchronization Error

OST file located at user systems need to synchronize with Exchange Server, sometimes while synchronization it leads to a large number of conflicts also called Synchronization errors which further not allow opening particular Outlook item leaving the OST in orphaned stage. You can use Best OST Converter Tool to bail out from this problem.

Virus or Malicious Software icon

Virus or Malicious Software

Another reason for OST is becoming inaccessible due to the problem caused by the viruses and malicious software damaging our Outlook and Exchange Files. The Stellar OST to PST Converter Software is helping in restoring the damage OST files in PST formats.

Abnormal Outlook Termination icon

Abnormal Outlook Termination

if Outlook is shut down abnormally when you are opening, accessing or synchronizing the OST file, then the OST file is prone to be corrupted or damaged. This can happen if Outlook is busy in doing something and you terminate it by click "End Task" in Windows Task Manager, or if you turn off the computer without quitting Outlook and Windows normally. Find more info why you need to convert OST file into PST.

Export OST to PST icon

Export OST to PST

An OST file stores a replica of your Exchange mailbox on the local system. This file lets you work seamlessly when the Exchange server experiences technical difficulties. There could be several reasons to export the data within OST file to PST format including damage / corruption of OST file, need to access OST file data on another local system, and more. OST to PST converter swiftly and smoothly extracts all data within OST files and saves them securely into a newly created PST file. The new PST can thereafter be imported into MS Outlook to access all data. See steps to convert OST file into PST using Stellar OST to PST Converter.

Convert all Exchange objects to Outlook compatible format icon

Convert all Exchange objects to Outlook compatible format

OST PST Converter Software ensures all Exchange mailbox objects like emails, contacts, attachments, notes, journals, calendar entries, etc. stored within OST files get converted into PST format. The tool considers all risk-factors and skillfully averts issues to achieve precise OST 2 PST conversion. You can make sure that all items have been converted by keeping an eye on the counter that the software displays against each mail folder were indicating the number of items converted.

Multiple Saving options for Individual Mails icon

Multiple Saving options for Individual Mails

The Powerful OST to PST Converter Software also provides you the option to search and save individual email messages from within OST files. In case you do not have the time to convert all OST items into PST, you can choose specific email messages to be extracted from the OST based on various parameters such as 'To', 'From', 'Subject', and 'Date' and convert them into a variety of formats including MSG, EML, RTF, HTML, and PDF formats. This feature lends this tool a high degree of flexibility making it stand above its competition.

Organize Mail Messages Better icon

Organize Mail Messages Better

OST PST Converter Software gives weight to good mailbox organization. Once OST scanning is completed, and all recoverable items have been discovered, the product allows you to sort and organize your email messages by Date, From, To, Subject, Type, Attachment, Importance, etc. Additionally, it lets you further improve scan result readability by allowing you to segregate emails in groups through a convenient “Show in Groups” feature.

Customizable user-friendly options icon

Customizable user-friendly options

This product comes equipped with an attractive yet extremely simple GUI that makes working with it a breeze. Helpful instructions and appropriately explained options un-complicate things even for non-technical users. Moreover, some convenient alternatives such as a smart preview of objects before conversion, the choice to save converted data at any desired location on the system or network, picking choice of format to save individual mail messages, etc. make Stellar OST to PST Converter one of the best tools in its category.

Conversion of Encrypted OST file icon

Conversion of Encrypted OST file

User encrypt OST file to keep their important information secure from unauthorized access. Sometimes you may experience an error that it is not an Outlook Data file when tried to open encrypted OST file. In such situation, you might have lost access to your encrypted OST file. To overwhelm from the above issue, you need to convert your encrypted OST file to PST file format. OST converter tool helps you to fix encrypted OST file & safely convert it to PST file.

Free OST to PST Converter icon

Free OST to PST Converter

The converter tool allows free OST file to PST file Conversion for 20 emails per folder. All you need to download the Free version of the software and scan your OST Files. After scanning, the software shows the preview of converted OST file & supports free conversion for only OST to PST file format. To save free 20 emails per folder, just click on ‘Save converted file’ button & converted OST file will save at your specified location.

Wide Compatibility icon

Wide Compatibility

One of the highlights of this tool is its compatibility with a number of MS Office versions. It supports 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.

Convert OST to Office 365 icon

Convert OST to Office 365

The tool also provides the option to export converted PST to Office 365 format. To save mailbox data in office 365 format, you need to have Microsoft Office 365 user account. Note: The software only migrate offline mailbox data to office 365. This feature is available in Tech Version.

Split and Compact large PST files icon

Split and Compact large PST files

The Software provides two advanced options for new created PST file: Split & Compact. To compress the converted PST file, you just need to click on “Compact & Save PST” option and it decreases the size acquired by PST file in the disk. Another feature Split the large PST file is helpful if you have a bigger PST file and you want to break it in to smaller parts to avoid the possibilities of PST file corruption. These features are available in Tech Version.



Use following steps for successful conversion:

  • Run Stellar OST to PST Converter software.
  • Select your OST file from ‘Select Outlook File’ option.
  • Click ‘Scan Now’ button to start the scanning process.
  • Click 'Save Converted File' button to save OST file into Different file formats.
  • Select ‘PST’ file option to convert OST to PST file format.
  • Click on ‘Browse’ button to select destination path and click ‘OK’ button.
  • Congratulations, your PST file saved at your specified location.

The software will scan the OST file and list all the mailbox folders in the left pane. Click on a folder to preview its items and save them at a destination location.

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.

Yes, the software 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, MS Outlook will create a new personal folder (PST) file.

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

The Software does not perform any action on corrupt OST file. The software converts corrupt OST file into accessible PST file which you can easily import into MS Outlook to access all your OST file data.

If you face any problem during the OST file conversion or after the conversion, you can contact our support team support@stellarinfo.com.

The software offers two versions – Corporate & Technician. If you only need to migrate OST file into PST file format then you should go for Corporate. Some advanced features of Corporate version are listed on the page. If you want to convert as well as compact & split large OST file then you should go for Technician version. Technician version also has the option to save OST file into Office 365.

You can easily take backup of your Exchange data by converting the OST file to PST file format.

Yes, the software converts OST file that is not connected to Exchange Server.

We provide demo version to check the preview of OST file. You can save 20 items per folder for free in the demo version. If the software saves 20 items in demo version then it guaranteed that software will convert OST file into PST file format.
Note: We strongly recommend to users to run the demo version of the software to check the product capability before purchasing the software.

The software 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.


Rating & Reviews


4.6 out of 5 stars


5 star (0)
4 star (0)
3 star (0)
2 star (0)
1 star (0)

WRITE A Review

Share your thoughts

User Comments



Excellent Customer Support from Ronit Singh.....I was able to accomplish cnverting very important OST files to PST. Thank you Ronit!!!



Earlier, it was a time-consuming process to export 100+ mailboxes offline folder in PST file. But, it always do swiftly without a single error.



This software did everything for its corporate users. Our all team members were occupied so we had an urgent requirement for an automatic tool for safe Exchange Server backup data. After getting a reference to this tool from MVP community, we had started to work on our bulk requirement. Finally, it did a backup of 145+ mailboxes by converting OST file to an Outlook PST file.

Excellent performance!



Trouble free solution but paid for unlimited uses. I think you guys should increase current saving limits (20 emails/folder) in demo version.



Works efficiently! Our IT department is using this one tool.

Janet Chua


I didn’t face any result specific issues from this tool.



This product saved my hide!! Thank you.

Aaron William


Pre-migration, our company wanted to backup Outlook data of 30 to 40 staffs. Finally, we completed our task using this one converter.

Ray Fitzgerald


I can say that performance and output is excellent.



Generally, I deal with manual technique but for the larger ones it is the best choice.



I'm completely satisfied with this software as of now. Runs and executes efficiently and in a timely manner. Thank you and God bless you and yours!

Paul Rodriguez


Being an administrator, I have realized that this tool is making routine work easier.



The conversion process is pretty straightforward. I will definitely recommend this tool to my client.

Brian McDermott


I always prefer this tool because automation process has many significant benefits.



I encountered my first email conversion assignment on day 1 of my second job in IT. I was part of the administrator team. I can’t forget role of this tool for lifetime.


Add Comments


Stellar Phoenix & Stellar Data Recovery are Registered Trademarks of Stellar Information Technology Pvt. Ltd.
© Copyright 2017 Stellar Information Technology Pvt. Ltd. All Trademarks Acknowledged.