As there is much software available in the market to Repair OST files. I have one of the trustable solutions that will help you perform the conversion and I have personally used this tool is why I am recommending this unique application which can easily repair & recover the OST data.
GSTECH OST to PST Converter tool facilitates users to repair OST file and convert them to PST. This Software comes with numerous advanced user-friendly features for repair OST file easily with emails, contacts, journals, tasks, drafts, lists, posts, appointments, attachments, calendars, links and it also recovers email properties like - From, CC, BCC, To, Subject, Date and Time. This tool also supports many other formats to save offline OST files to EML, MSG, and HTML.
Know more info- https://www.gstechsoftware.com/osttopst/