Diaeresis HTML entity ¨

¨ is the HTML entity for Diaeresis ¨ (U+00A8). Copy the decimal ¨ and hex ¨ codes plus CSS, JavaScript, Python and URL escapes.

Entity
¨
Also written
¨ ¨ ¨
Legacy form
&uml (no semicolon)
Code point
U+00A8
Unicode name
DIAERESIS
Block
Latin-1 Supplement
Category
Modifier symbol (Sk)
Since
Unicode 1.1
Defined in
HTML 4.01 and HTML5

Codes to copy

HTML named¨Works in HTML; in XML only & < > " ' are predefined.
HTML decimal¨Works in HTML and XML.
HTML hex¨Works in HTML and XML.
CSScontent: "\A8";In a stylesheet, for ::before and ::after.
JavaScript"\u00A8"Also valid in JSON.
Python"\u00a8"Python 3 string literal.
Python by name"\N{DIAERESIS}"Readable alternative using the Unicode name.
URL%C2%A8Percent-encoded UTF-8 bytes, for a path or query value.
UTF-8 bytesC2 A82 bytes.
UTF-1600A81 code unit, which is what JavaScript length counts.

When to use it

The diaeresis or umlaut dots on their own. For a letter with them, use its name, such as ö or ü.

The name dates from HTML 4, so it works in every browser and in old email clients.

Browsers also accept the legacy form &uml without a semicolon, for compatibility with old pages; new HTML should always end the reference with a semicolon.

More punctuation and typography

All punctuation and typography · Every HTML entity · Encode or decode text

Source: the WHATWG HTML Standard list of named character references and the Unicode Character Database (Unicode 18.0).