I'd like to draw your attention to the sysinspire OST to PST Converter utility, which can simply convert an OST file into an Outlook PST file. With the aid of this free program, users can simply repair any corrupt OST file and restore all of its accidentally lost data, as well as convert OST files into a variety of file formats, including Office 365, MBOX, CSV, EML, MSG, vCard, HTML, and PST Outlook. It features a free trial edition that allows you to simply export 50 items from an OST file to PST and other formats.
Read More:- Convert OST File to PST

Smoothly Restore & Convert OST to PST and transfer all your offline mailboxes, contacts, calendar etc from OST to PST file with best performing OST to PST Converter application. This is the easy way to convert OST items into PST on any Windows and without any issues. Along with it 100% capable to conversion data from corrupt OST file to PST, MBOX, EML, EMLX, MSG, and etc.
Quickly scan & repair damaged as well as orphaned OST files.
Generate preview of emails and export complete OST data .
Supports Microsoft Outlook 2019, 2016, 2013, 2010 and 2007 etc.
Support saving of OST files multiple file formats such as MSG, EML, EMLX and MBOX
Reliable Solution to Convert OST to PST without Microsoft Outlook.
Read more :- https://www.osttopstapp.com/