SysInfo PST Viewer Tool is the best way to read PST files without having Outlook installed. This tool is very helpful for those who don’t have MS Outlook but need to open PST files without MS Outlook. It can read emails, contacts, calendars, notes, journals, and more. You don’t need any technical skills to use it. Just select the PST file, and you can see all the data. It supports large PST files and shows everything in an organised way. This tool is free and only works on Windows systems. It’s perfect for users who want a simple solution.