FME can write any arbitrary HTML file, one line at a time.
The writer will always overwrite existing files.
It will use UTF-8 encoding for the text and system line termination characters.
This writer has a defined schema that expects a single attribute html_content to be fed in. Because of this, this writer cannot automatically map over attributes when using Generate Workspace from the Workbench File menu. Instead a workspace must be designed to pass an attribute with valid HTML content into the html_content destination attribute.