The best way to convert Thunderbird emails to HTML files is EmailSoftwares Thunderbird to HTML Converter. This app supports the bulk conversion of Thunderbird emails with attachments intact, folder hierarchy preserved, and with all metadata remaining unchanged. It provides a smooth and accurate conversion process without requiring Thunderbird installation. The program has a user-friendly interface that is so intuitive an amateur without technological skills can handle it. It's compatible with all versions of Windows from 11 to 7 and works perfectly for a quick and secure email conversion. Get the free demo version to see Thunderbird emails before purchasing. Obtain it now for easy conversion.