The OST to PST Converter application converts OST files into a variety of other formats, including PST, EML, MSG, and MBOX, in five simple steps. The tool runs as a single Windows application, so you don't need Outlook installed to use it. It is compatible with all Outlook versions from 2003 and later. There's no limit to the file size. It works with orphaned files and retains the email contents, including emails, contacts, and attachments, after conversion. Reliable solution for moving emails, making secure backups of email files, and recovering lost or damaged email files.