Yes. One of the main advantages of a PST viewer is that it can allow you to inspect the contents of a PST before performing any further action. This is useful when you have several PST files and are not sure which one contains the information you need.

After selecting a PST file, the viewer scans its structure and displays the available folders and items. You can then open individual emails and, depending on the software, view attachments, contacts, calendars, and other mailbox data.

Previewing the file first helps you determine whether it contains the required information. For example, you may discover that one PST contains an old employee's mailbox while another contains a completely different archive.

This approach is also useful before migration or conversion. Instead of immediately converting an entire PST viewer, you can first inspect its contents and identify the folders that actually need to be processed.