JavaScript Visual HTML Template Editor can be used to display a visual editor in a Web browser that lets the user edit an HTML template document. This is a WYSIWYG editor that shows the HTML document being edited exactly how the document will look when displayed to the users. The editor provides a customizable toolbar, letting the developer define which buttons may appear in the toolbar rows. The developer may define special template placeholders and assign custom HTML tags that will be replaced in the document where the placeholders are inserted.