Explore PST and OST Files — Without Outlook
Need to view the contents of a PST or OST file, but don’t have Outlook installed?
PST Inspector is a free, standalone tool that lets you open and explore Outlook data files — no Outlook, no Office, no MAPI required.

Lightweight and easy to use, PST Inspector gives you full access to folder structures, messages, attachments, and more — including legacy and modern file formats.
👉 Try it now — no installation hassle.