If you have an old Outlook archive but no Outlook program on your computer, you might wonder what to do next. Instead of installing Outlook just to view the file, there’s a simpler option. The article explains how to open PST File Without Outlook using a dedicated viewer that doesn’t depend on the Outlook app. The MSOutlookHelp PST Viewer lets you browse all your emails, contacts, calendars, tasks, and notes inside a PST file. It supports both ANSI and Unicode PST formats, so it works for old and new archives. Also, this tool can handle very large PST files, giving you access even to heavy, years-old mail backups.