You can open multiple PST files without Microsoft Outlook using the SysInfo PST Viewer. This powerful tool supports bulk processing, allowing users to open, view, read, and export multiple PST files simultaneously without any limitations. It ensures a smooth experience even when handling large volumes of data. The software also provides flexible export options, enabling users to convert PST files into formats such as PDF, PST, MBOX, EML, EMLX, MSG, CSV, HTML, DOC, and even Thunderbird-compatible files. Additionally, its advanced search feature helps users quickly locate specific emails by applying filters like sender, date range, subject keywords, or attachment type—all at once. Another standout feature is its direct attachment access and preview option. With a dedicated attachment button in the preview panel, users can easily view, find, and save attachments without opening the full email.