Top 5 OST to PST Converters

If Outlook is not working, a mailbox is deleted from Exchange Server, the OST file becomes orphaned, or you need to migrate data from OST to PST, then you’ll need a reliable OST to PST converter tool to extract data from the OST file and save it in PST. However, there are numerous OST to PST converter tools available in the market. So, it is difficult to decide which tool is best for your needs.

This post will help you know the top 5 OST to PST converter tools in 2021 for converting your OST to PST.

Top 5 OST to PST Converter Tools

Here are some best OST to PST converter tools based on their features, functionality, and ease of use.

Top 5 OST to PST Converters

Stellar Converter for OST

This is one of the best and well-known OST to PST converter tools. Many IT administrators recommend it for converting inaccessible or orphaned OST files to PST and other formats. It converts emails, attachments, contacts, calendar items, and other mailbox items in OST to PST, with 100% accuracy and integrity. Furthermore, the software can convert multiple OST files of any file size.


• Converts orphaned, encrypted, and inaccessible OST files to PST format.
• Converts all OST mailbox components, including emails, attachments, contacts, calendar entries, and notes.
• Provides a three-pain preview of mailbox items when the conversion is completed.
• Batch conversion feature to convert several OST files to PST files at once.
• Recovers deleted mailbox items and highlights them in red.
• Advanced filters to convert selective emails or messages based on ‘To’, ‘From’, ‘Subject’, and ‘Date’.
• PST, EML, MSG, PDF, RTF, and HTML are a few saving options.
• Directly exports OST file to Office 365 account or a live Exchange Server (Technician version).
• Exports contacts to CSV file (Technician version).
• Option to split and compact the converted file.
• Technical assistance is available 24×5.
• Outlook 2019, 2016, 2013, and older versions and Windows 7, 8, 8.1, and 10 are supported.


• Only 20 items per mail folder are saved to PST in the demo (free) version. However, after conversion, you can see all the mailbox items for free.

SysInfoTools OST to PST Converter

SysInfoTools OST to PST Converter is one of the best tools for converting OST files to PST. It converts the OST file into multiple file formats, like MSG, DBX, EML, MBOX, and PST. In addition, the inaccessible Exchange OST files can be easily repaired with the software.


• Converts emails, notes, tasks, reminders, and other OST mailbox objects to PST format.
• Converts OST files that become inaccessible.
• OST file of any size is supported.
• Supports the password-protected or encrypted OST files.
• Converts OST to PST in a precise and accurate manner.
• It provides a preview of mailbox items before saving.
• Provides OST to PST conversion status report.
• Option to exclude emails using various filters.
• Bulk conversion of OST files is also supported.


• Only a few file formats are available for export.
• There is no scope to compress a PST file.
• Only the first 50 items per mail folder are saved in the demo version.

Aryson OST to PST Converter

Aryson OST to PST Converter is a reliable OST to PST file converter tool that you may download from their official website. The software can convert OST mailbox items, such as emails, contacts, calendar items, tasks, notes, and other items from an offline OST file to an Outlook importable PST format. It can also handle OST files that are inaccessible. During the conversion process, the software ensures data accuracy and integrity.


• User-friendly and intuitive interface.
• Converts OST files to PST, EML, MSG, MBOX, DBX, and Archive formats quickly and easily.
• Option to search and locate Offline OST files quickly.
• Complete preview of the converted OST file before saving.
• All versions of MS Outlook and Windows OS are supported.


• You do not get the compact option with the software.
• It takes time to download due to the large EXE size.
• It cannot export your OST directly to your existing Outlook profile.

Advik OST to PST Converter

Advik OST to PST Converter is a well-known conversion tool to convert OST files to PST format quickly. It saves the OST file to PDF, TGZ, MBOX, MSG, EML, DOC, and other file formats, in addition to PST.


• Converts OST file to PST without any file size limitation.
• Supports Outlook 2019, 2016, 2013, and earlier versions.
• Converts OST file that’s encrypted.
• Maintains metadata and organization of OST mailbox folders.
• Support for several output file formats.
• Repairs OST file that has been damaged.
• Batch conversion option to convert multiple OST files.
• Exports the converted data to Office 365.
• All the Windows versions are supported.


• There is no option for compacting the PST file.
• There’s no free preview of the data after conversion.
• There is no option to export OST files to the existing Outlook profile.

BitRecover OST to PST Converter

Another well-known OST to PST converter software is BitRecover OST to PST Converter. Its advanced algorithms help convert all the data from OST files to different file formats. Along with this, it efficiently converts inaccessible OST files to PST files while keeping all the data intact.


• Converts OST to PST with no size restrictions.
• After OST conversion, attachments are saved to a PST file.
• Encrypted, compressed, password-protected, and corrupted OST files are also supported.
• Directly exports OST files to Outlook 2019, 2016, 2013, 2010, and older versions
• Exports OST data to Office 365.
• Splits converted PST files into 2, 5, and 10 GB file sizes.
• Recovery Mode option to convert corrupt OST files to PST.


• No option to compact the PST files.


These are the top 5 OST to PST Converters in 2021 that have been tested by thousands of users. You can use any of them based on your requirements. Compared to manual procedures, utilizing a professional OST to PST converter tool to export the OST file data to PST is more convenient and secure.

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