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Version: 10.0

Date: 11-2019

Stellar OST to PST Converter


Powerful software to convert inaccessible OST file into PST file & extract mailbox data with 100% precision. The tool converts OST to PST file without Exchange and extracts all mailbox items - emails, attachments, contacts, & calendars, etc. with ease.

  • Converts encrypted OST file into PST. Also works on IMAP OST files
  • Converts large OST file to PST - No file size limitation
  • Exports mailbox data from OST to Office 365 & Live Exchange (Technician Edition)

When to Use Stellar OST PST Conversion Tool?

Need to Extract Data from Inaccessible OST?
Exchange Server crash and mailbox synchronization problems can turn OST file inaccessible or orphan. Similarly, a client machine may fail to boot due to hardware problem, crash, or malware infection, or the drive containing OST file may have large number of bad sectors. These situations ultimately result in inaccessible OST with risk of losing critical mailbox data if there�??s no backup. With Stellar tool, you can convert OST to PST & extract mailbox data including emails, attachments, contacts, etc.

Are You Migrating to a New Email Service?
When you migrate to a new email service, it may be a challenge to access mailbox data stored in OST files of user accounts that are configured with older email service. This might turn into critical situation in case if there�??s no PST backup of the OST files, as that would result in loss of unsynchronized mailbox data inside OST. Stellar tool addresses such email migration challenges by allowing to convert OST to PST and extract mailbox data - emails, attachments, contacts, notes, etc. in a portable format. The resultant PST can be imported in a compatible email service.

Changing Over to a New Computer?
OST file is local cache of the user�??s Exchange mailbox, which can�??t be directly imported in Outlook or opened on any another system. So when you change over to a new computer, the data stored in the OST will be lost unless you find a way to retrieve it in a portable format such as PST. Stellar OST PST conversion tool makes this possible by converting OST file and extracting mailbox data in PST format, which can be opened in Outlook client installed on the new machine.

Facing Difficulty with Outlook Import/Export Wizard?
Outlook Import/Export wizard is a great built-in utility for exporting mailbox data from OST to PST for Exchange connected accounts. However, it cannot extract data from inaccessible OST, i.e. Offline Outlook Data files without Exchange account. Further, Outlook Import/Export utility requires users to have technical proficiency and spend time to get the expected results. It also needs the same original Exchange account for this task, and you cannot convert inaccessible OST files with the help of Import/Export Wizard. Stellar Converter for OST software provides a hassle-free and reliable solution for converting OST file into PST. The OST PST conversion tool extracts mail items with 100% precision and original integrity.

More Awesome Features

Extract Mail Items by Converting Inaccessible OST to PST
Has Exchange crashed and you're facing mail synchronization problems, system hardware has crashed or users are changing over to new machines? These situations might result in OST file inaccessibility, creating the need to open OST file without Exchange for extracting �??locked out�?? or unsynchronized data. Trust the leader when you need a reliable tool for extracting mail items from inaccessible OST. Stellar Converter for OST helps as a professional solution to rescue mailbox data from inaccessible OST in several such situations, when Import/Export wizard is of no use and you can�??t trust just any tool with your emails and other mailbox data. Advance Repair

Extract Exchange Objects from OST with High Precision
The OST PST Converter Software extracts all Exchange mailbox objects such as emails, contacts, attachments, notes, journals, calendar entries, etc. from OST files and saves them in PST format. The tool performs 100% precise OST 2 PST conversion, and maintains original integrity of mailbox items. Its advanced scan engine parses OST files of any size (no file size limitation) and extracts complete mailbox data including emails, attachments, contacts, and calendars. The software offers administrators most precise OST conversion at speed, thereby freeing up their valuable time & efforts for more strategic projects.

Convert OST Data in Multiple File Formats
The Powerful OST to PST Converter software allows searching and saving individual emails from OST file. In case you do not have time or do not wish to convert all OST items to 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 Messages to Improve Readability
The OST PST Converter software extracts mailbox data in an organized manner while maintaining the original format and arrangement of items. Once OST scanning is completed and all recoverable items have been discovered, the product allows sorting and organizing email messages by Date, From, To, Subject, Type, Attachment, Importance, etc. Additionally, it offers enhanced view of the scan results by allowing to segregate emails in groups by using �??Show in Groups�?? feature.

Converts Encrypted OST file
Users 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 trying to open encrypted OST file. In such situation, you may lose access to the data stored on your encrypted OST file. To overcome such issues, you would need to convert the encrypted OST file to PST format. OST converter tool converts encrypted OST file to PST, thus allowing to regain access of mailbox data.

Free OST to PST Converter
The tool allows free OST file to PST file Conversion for 20 emails per folder. All you need to do is download Free version of the software and scan the OST file. After scanning, the software shows preview of converted OST file & supports free conversion for OST to PST file format. To save free 20 emails per folder, click on �??Save converted file�?? button, and the converted OST file will be saved at your specified location.

OST Conversion at Your Pace & Convenience
The software allows to save the scanned information as a DAT file which can be loaded anytime later to reinstate the conversion process. Using this feature, users can split the scan and preview instances in the process, and save mailbox data in PST without the need to repeat the scanning process. This feature is helps users to avoid spending long durations to scan and retrieve mail items from large OST file in a single stretch.

Converts Multiple OST in a Batch
The tool can perform batch conversion of multiple OST files into PSTs through a single process. This makes it convenient in situations wherein data needs to be extracted from several OST files, for example, when an organization is moving to a new email service and needs to extract mailbox from several inaccessible OSTs. Further, the option to save the resultant PST files at the same location helps in tracing them later. Batch conversion feature is available in Technician Edition of the software.

Exports Mailbox Data from OST to Office 365
The software supports mailbox migration to Office 365 as it can directly export the OST to PST converted files to Office 365. All you need is an Office 365 account with valid login credentials and the software can allow export of mailboxes to O365 by connecting through its interface. OST to Office 365 export feature is available in Technician Edition of the software.

Splits and Compacts Large PST Files
Technician edition of the software can split large Outlook PST file thus reducing its chances of corruption and improving long-term manageability of emails. It can split PST by Size, Date, Email ID, and Folders, while maintaining original structure and organization of emails. Likewise, it can compact PST file to ensure optimal performance of Outlook without lag or crash. It optimizes PST file size by compressing all attachments in a new folder and emptying �??Deleted Items�?? and �??Junk Items�?? folders.

System Requirements

  • Processor - Pentium Class
  • Operating System - Windows 10, 8.1, 8, 7
  • Memory - 2 GB minimum (4 GB recommended)
  • Hard Disk - 250 MB of free space

Trial Download

Price information

Download Trial (4495 kB)

Select Product / License Count / Delivery type




Stellar Phoenix OST to PST Converter Corporate license 1-year Subscription (email)




Stellar Phoenix OST to PST Converter Technician license 1-year Subscription (email)




Pricing is based on prepayment and excluding VAT / BTW / MwSt / TVA.

** Prices for shipping, valid for shipping within The Netherlands.

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Last updated : 20-11-2020


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