Opt OST converter software freeware from KDETools software. It is a successive tool which can successfully repair and recover corrupt and damaged Outlook OST files. This Outlook OST to PST Converter software to convert them into new healthy readable PST file, office365, Gmail, Live Exchange Server and give option to save it in multiple formats such as EML, MSG, HTML, MBOX, PST, vCard, vCal, and HTML comfortably. 

ost converter software