HTML sup element

The <sup> HTML element specifies inline text which is to be displayed as superscript for solely typographical reasons. Superscripts are usually rendered with a raised baseline using smaller text.

The <sup> element should only be used for typographical reasons—that is, to change the position of the text to comply with typographical conventions or standards, rather than solely for presentation or appearance purposes.

For example, to style the wordmark of a business or product which uses a raised baseline should be done using CSS (most likely vertical-align) rather than <sup>. This would be done using, for example, vertical-align: super or, to shift the baseline up 50%, vertical-align: 50%.