Migrating from NSF to PST with the eSoftTools Free NSF to PST Converter Software. Originally, this program can scan and access all data quickly. You can export a single or several emails from an NSF file to PST format. Free conversion of a few emails per folder from an NSF file to EML, Yahoo, Gmail, PST, MBOX, MSG, HTML, HTML, and more formats is possible with this application. The best thing about this tool is that it can support all versions of MS Outlook and Lotus Notes versions.