Download Microsoft ost to pst converter online free from KDETools software. free unlimited ost to pst converter tool quickly convert selective ost files in new outlook pst file. ost to pst converter open source app split large pst file easily. its tool to  export their all over data into various file formats like PST, Zimbra, OLM, MSG, EML, EMLX, Gmail, vCard, ICS,  live exchange server, MBOX, PDF, NSF, and etc.