Free DEMO OST to PST Converter to Convert OST File to PST without Outlook

You can download the free DEMO version of third-party OST to PST Converter software because there is no free tool to convert OST to PST. I am suggesting one of the most advanced and reliable solutions named as MailsDaddy OST to PST Converter software. The free version is only available for viewing the preview of the OST mailbox and it exports only the first 20 items from every folder of each OST file.