If you're searching for the best OST to PST converter, I recommend trying the Microsoft OST to PST Converter by GoldyTools. This software offers a 100% safe and secure conversion process and is known for its reliability and user-friendly interface.

One of its standout features is support for exporting OST files into multiple formats, including PST, MSG, MBOX, HTML, EMLX, and EML. It allows you to convert a wide range of mailbox components such as emails, attachments, calendars, contacts, notes, journals, and metadata like To, Cc, Bcc, images, and more.

GoldyTools also provides a free preview feature, so you can review the content before performing the conversion. The software is fully compatible with the latest versions of Microsoft Outlook and Windows, ensuring smooth performance across platforms.
https://www.goldytools.com/blog/import-ost-to-outlook-pst/

MacMister OST to PST Conversion Software for Mac and Win OS is a very helpful method for converting mailbox data from OST to PST including all contacts, calendars, emails, contacts, etc. One can effortlessly run this utility without any trouble and there is no need for any technical knowhow. You should try the free demo edition of the tool to check the more functions of the tool.
Read More- https://www.macmister.com/blog/convert-ost-to-pst-without-outlook/

Kernel for OST to PST Converter is a versatile tool that allows for the conversion of OST files to PST format. It offers features such as bulk conversion, selective item migration, support for encrypted OST files, and a simple and straightforward conversion process. https://www.nucleustechnologies.com/ost-to-pst-converter.html