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Stellar Converter for OST is a reliable software that converts OST file into importable PST. The software converts all components including emails, contacts, calendars, journals, etc. and displays the entire content in three-pane structure to save them in a new PST. Also, provides an option to save emails in MSG, EML, RTF, PDF and HTML format. The DIY converter software exports the converted data directly to Office 365 or Microsoft Exchange.

Free OST to PST Converter

Free OST to PST Converter

The converter software allows free conversion for 20 emails per folder. Download software, select and scan OST, verify preview and click ‘Save Converted File.’

Split and Compact large PSTs

Split and Compact large PSTs

Newly created large PST files are compressed with the help of ‘Compact and Save’ function. The ‘Split and Save’ function splits large PST into smaller PSTs as per size or date.

Batch Conversion

Batch Conversion

Create a ‘Batch’ of multiple OST files to convert them all into PST files in one process. All the PSTs are saved at the original location or as specified.

Organizes Mail Messages

Organizes Mail Messages

Once scanned, the mailboxes can be better organized on the basis of Date, From, To, Subject, Attachment, etc. You can also segregate emails in groups with “Show in Groups” feature.

Emails are the most significant business communication assets.
Stellar provides a comprehensive solution to maintain the email client data.

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

Knowledge Base

Helps Resolve
Outlook Issues

Microsoft Outlook is one of the most used email clients, but it is prone to issues such as Synchronization error, abnormal Outlook termination, data storage failure, or virus or malicious software attack. As a result, the Outlook Storage Tables or OST may become orphaned or inaccessible. Stellar Converter for OST extracts the entire data within the OST files and exports it to newly created PSTs. The software works equally well on encrypted and iMAP OSTs.

Save and Load
Scan Information

Users can split the ‘scan and preview’ process and the ‘saving’ process without repeating the scanning procedure. Save the scanned and converted data in the DAT file format. Resume the operation after some time by uploading this DAT file and saving the data in PST or another preferred format. The method is useful when the user is unable to carry out the entire OST to PST conversion process at one-go, and performs the process without wasting time in repetitive scanning.

Exports data to
O365 or Live Exchange

The Tech version of Stellar Converter for OST allows Administrators to convert the OST file data and export it directly to a live Exchange server or Cloud Office 365. The Administrator should have valid Admin-credentials for the Exchange server or O365 account. With this feature, the Admin performs smooth mailbox migration, in case the organization decides to shift from on-premises Exchange to Cloud Office 365, or a hybrid environment. The software also allows users to export all contacts in OST file into CSV format.

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Stellar Converter for OST

Stellar Converter for OST
Product Features



Special Benefits
Installation Single System 3 Systems
Lifetime License Yes Yes
No file size limitation Yes Yes
Free Technical Support Yes Yes
Converts data of Offline Storage Tables (OST) to Personal Storage Tables (PST) Yes Yes
Converts all components of Exchange mailbox such as emails, contacts, calendars, etc. Yes Yes
Displays preview of all items including emails and deleted emails, attachments, contacts, etc. Yes Yes
Converts Encrypted and iMAP OST files in few easy steps Yes Yes
Saves scanned information as DAT file to reload and save later Yes Yes
Saves the emails in the converted file as MSG, EML, RTF, HTML, or PDF format Yes Yes
Supports almost all versions of Microsoft Outlook Yes Yes
Converts multiple OSTs into PSTs and saves at the specified location Yes
Reduces file corruption with ‘Compact and Split’ converted PST Yes
Exports the converted and previewed file to Office 365 format Yes
Saves the converted file in MBOX and DBX file format Yes
Exports all contacts in Microsoft Outlook to CSV file format Yes
* Free Download enables you to preview the converted file and save 20 items per folder.

Compatibility and Support

Operating System: Windows 10, 8.1, 8, 7, Vista, XP.

Supports: It supports MS Office 2019, 2016, 2013 (32 bit version and 64 bit versions), MS Office 2010 (32 bit and 64 bit versions) / 2007 / 2003 / 2002 (XP) / 2000. Supports MS Outlook 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000

Customer Reviews