Free OST to PST Converter
With the help of Recoveryfix OST to PST Converter tool to migrate OST data to email servers without data loss. It converts offline Outlook OST files into compatible formats and supports seamless migration to Exchange Server, Microsoft 365, and other email platforms. The tool preserves emails, contacts, calendars, attachments, and folder hierarchy, ensuring a secure, accurate, and hassle-free migration process. Read more: https://www.recoveryfix.com/ost-to-pst-converter/
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Ash Croft
commented
If you're looking for a free OST to PST converter, I'd check the actual free conversion limit before choosing one. Some tools offer a free download but only let you preview the mailbox or convert a very small amount of data.
One option worth checking is OST to PST Converter. Its free version allows you to convert up to 500 MB of OST data to PST, so you can actually test the conversion rather than just previewing the mailbox.
The conversion is useful for recovering or accessing mailbox data from an OST file when you need it in PST format. Before converting, it's also worth checking whether the tool preserves important mailbox data such as emails, attachments, contacts, calendars, and folder structure.
For smaller OST files, having 500 MB available in the free version makes it a practical option to try before paying for a full version.
https://www.osttopst.com/