You said you ?frequently use notepad to save small files as .html. ?
And then you asked ?Is there a way to set up Notepad to default the "save as" to an .html file?
I am not suggesting that Notepad can automatically do anything (Exception: there is one thing it can automatically do, but that has nothing to do with html files, ask me if you want to know what that is). I just figured that if you are already an HTML coder (a person who is familiar enough with HTML code to type and/or read the ?<whatever> </whatever>? HTML tags) and are glutton enough to use Notepad as the editor, that you were asking if Notepad can automatically save to the ?.html? (or, my suggestion, the ?.htm?) extension.
There is nothing special about the HTML file format that prevents any text editor from opening, editing, or saving HTML files. HTML code is all text. What makes HTML coding special is the viewer used to open an HTML file as it is meant to be viewed, and that is in a browser. A browser will take all those HTML codes and perform screen manipulation to adjust for fonts, lines, color, graphics, etc.
So, any text editor (I expect) can save files with the .HTML, .HTM, file extension.
I just said that you can use a Hex editor to have Notepad automatically append the HTM extension to your desired filename.
There is no ?conversion? involved; it is just an extension issue.
You can take any .HTML file now, and rename it to a .TXT extension and open it with Notepad (barring some possible file size restrictions).