SysInfo PST Viewer is a free and reliable tool to read and open PST files without Outlook. If you need to check emails, contacts, notes, or calendar events from a PST file, this tool will help you do that easily. It works perfectly on Windows and supports all types of PST files. Even if your PST file is large, this tool will open it smoothly. You don’t need to install MS Outlook to use it, making it a convenient solution for users who just want to view their PST files.