In order to convert plain text file to HTML format, you would need to manually write the tags and properly format the data. Various HTML code editors can be of great help here, as well as some other similar programs and speed up the process considerably.
But of course you can just insert (copy) the text as body to HTML document. Any text editor can help you with this.
Unfortunately, there is no detailed software record in the database that match this conversion.
TXT
Files with txt extension are simple plain text files viewable in any text editor.
HTM
A htm file extension is used for web documents stored in HTML Hypertext Markup Language file format. HTML language provides a means to create structured documents by denoting structural semantics for text such as headings, paragraphs, lists, links, quotes and other items. Its the main language for writing web pages. A htm web page can be displayed in any Web browser.