If you want to convert OST to PST format and want to best software to convert OST to PST format so you can use the eSoftTools OST to PST Converter tool. This tool can recover corrupt OST files and export them into various formats like PST, EML, EMLX, MSG, MBOX, Office 365, etc. It’s Based on the GUI operating system. It can instantly import multiple amounts of data at a time from one to another window. It also repairs all internal email data like emails, documents, journals, appointments, attachments, deleted files, chats, notes, tasks, etc.