From time to time you might want to create a completely blank page in SharePoint. I found myself in this situation e.g. when the business requirement was to create a customizable SharePoint page that is to be displayed in a popup window or an iframe, and it should not contain any navigation, branding, breadcrumbs or ribbon.
The easy approaches I can see are:
1) Create “blank” MasterPage
You might create a blank MasterPage, which will hide some placeholders on a server side (so there’s less markup sent to a browser), and add some CSS styles to hide the other components (e.g. ribbon which is not placed in any placeholder).