To easily convert OST to PST file format with all emails, contacts, calendars, etc. using CubexSoft OST to PST Converter Tool. This software allows you to bulk export OST file to PST file format without Outlook. It has a very simple GUI, everyone can easily handle and manage the software without any help. There is no need to install the MS Outlook email program for the conversion process. During the process, the software keeps all the folder structures without any changes or data loss. It was compatible with both Mac OS and Windows OS.