10-16-2025, 01:36 PM
To open OST files without Outlook, you can use the SysInfo OST Viewer Tool. This free tool lets you view emails, contacts, and other data from OST files without needing Outlook or Exchange Server. Simply download the tool, select your OST file(s), and view the data in an easy-to-use interface. You can also export the data to formats like PST or PDF, though saving requires the paid version. The tool works with all Outlook versions and Windows operating systems.