Need to know how to convert OST to PST free? If yes is your answer, then you can use CubexSoft OST to PST Converter Tool to bulk export OST file to PST file format including all emails, contacts, calendars, and many more. There is no file size limitation, one can export a large size of OST files without any data loss. During the process, the software keeps all the folder structures without any changes and data loss. For getting more details about the tool, you can first utilize its free demo version, which allows you analyze its working by moving 25 emails from each OST file to PST format without cost. To migrate bulk emails from OST to PST format you need to buy its Licensed Edition.