The fast and reliable solution to convert OST to PST without Outlook is EmailsGuru OST to PST Converter. This utility does not require Outlook installation in your computer and efficiently convert OST file to Microsoft Outlook PST format, saving email, contacts, calendars, notes and all other items. This tool preserves all data integrity and original folder hierarcht throughout the conversion process. It comes with an user-friendly interface, batch conversion, free trial version, compatibility with different Windows Operating Systems and many such modern features, which makes it an ideal solution to convert OST to PST without Outlook.