Yes, the OST to EML conversion can be done without installing Outlook when using FixVare OST to EML Converter. This software is work fastly of Outlook, so users can easily convert orphaned or big OST files into EML format without any dependency. It scans the OST file directly and exports all emails, attachments, metadata and folder structure accurately. The tool supports both ANSI and Unicode OST files ensuring compatibility with all Outlook versions. It’s especially useful for users who have lost access to their Outlook profile or Exchange account and still need to recover their emails safely.

More Information https://www.fixvare.com/products/ost/eml/