Do you want to convert OST to HTML without damaging any data? So use the most reliable and effective third-party tool that's called eSoftTools OST Converter Software Software. This software easily converts all email items from Outlook OST to HTML, EML, EMLX, MSG, MBOX, MHTML, and many other formats. This utility is capable of migrating multiple OST file emails at one time with one click.
Know more:- Convert OST to HTML