CubexSoft Thunderbird Converter is a desktop utility for Windows and macOS that lets you export and migrate email data from Mozilla Thunderbird into a wide range of other formats and services. It can convert Thunderbird mailboxes, contacts, and calendars into file formats like PST, PDF, EML, MSG, MBOX and also directly to cloud accounts such as Office 365, Gmail, Exchange Server, Outlook.com and G Suite. The tool automatically detects Thunderbird profiles, preserves folder structure and email details (headers, attachments), and offers features like batch conversion, data preview and advanced filters to customise the export process.You can also try the free demo and export up to 20 emails from the mailbox for free.
