To open an OST file in Outlook the OST file needs to be converted to PST format. OST to PST Converter is a simple application for converting Outlook emails to PST format while preserving the organizational structure of the original file. The purpose of this application is to migrate and recover old, damaged, and orphaned files. It also supports a large number of document types, such as HTML, EML, MBOX, and others. Anyone can easily use the application thanks to its user-friendly interface, which is designed to run with the least amount of hardware and software configuration possible, giving users the best experience possible on any device.