If you are looking for freeware tool because your outlook OST File has been corrupted and inaccessible so in this case you can download OST to PST Converter Software that removes all errors from OST File and repair damaged and corrupted outlook OST File in order to convert offline OST File to PST, MSG, EML, EMLX, MBOX, vCard, vCal and Office 365. OST to PST Conversion Software let users convert all OST File emails, contacts, calendars, and task, notes & attachments items and supports all MS Outlook versions included- 97, 2000, 2002, 2003, 2007, 2010, 2013 and 2016. You can also try free demo version of the OST to PST Converter Software that allows users restore 20 emails per folders free of cost.

Read more:- Regza OST to PST Converter