In case of converting OST files to PST without Outlook, it is always advisable to use a professional tool like ZOOK OST to PST Converter. This will enable you to export complete mailbox data items of OST files into PST format including emails, attachments, contacts, calendars, tasks, etc. It is a completely Windows based utility which supports all the latest editions of Windows as well as MS Outlook. You can instantly convert OST to PST without Outlook installation in few clicks. You can also utilize a free demo version to convert up to 25 items from OST files into PST format.
Here are the steps to convert OST to PST without Outlook:
Step 1. Run ZOOK OST to PST Converter and install it.
Step 2. Choose OST Files or Folders.
Step 3. Pick up your desired saving location
Step 4. Hit on Convert button. Done!
This will help you to access your OST file in Outlook without any issues.