To open and view PST files without needing Microsoft Outlook, you can use Kernel Outlook PST Viewer software. This user-friendly PST viewer tool lets you easily access and read the contents of PST files, including emails, contacts, calendars, and more. It offers a seamless experience for viewing PST files without Outlook installed, while ensuring the integrity of the data. However, it does not provide options to save, edit, or modify the items within the PST file. Perfect for quick viewing and analysis, it is an ideal solution for users who need to access PST files without making any changes to the original data.