Text2HTML is a program for Windows and Mac.
It adds basic HTML tags on a text file for paragraphs and lists.
It's easy to use to convert a long text in HTML like for a book table of content.
This program is open source. You can compile a binary from its repository or support my work by buying a license and getting last Windows and Mac binaries here. You can also look at Developpeur Pascal's blog to read more behind the screen about this program and the others.
A lifetime license of Text2HTML and all of its releases.