² SUPERSCRIPT TWO UTF-8 character with hex code 00B2

Using HEX code of SUPERSCRIPT TWO in HTML file

<span> &#x00B2; </span>

Using Decimal code of SUPERSCRIPT TWO in HTML file

<span> &#178; </span>

Using HEX code of SUPERSCRIPT TWO in CSS file for content

span { 
    content: '\00b2';
}