The <sup> Tag in HTML 5

The <sup> tag creates superscript text. The sup element is one of the phrase elements in HTML. The content of the sup element is displayed above the normal baseline level. The <sub> tag performs a similar function except that the content is displayed below the normal baseline level.

An alternative to the <sup> tag is the vertical-align: super CSS style property. The vertical-align: sub style lowers the applicable content below the normal baseline level.