Capital I with Diaeresis HTML entity Ï

Ï is the HTML entity for Capital I with Diaeresis Ï (U+00CF). Copy Ï, Ï and the CSS, JavaScript, Python and URL escapes.

Entity
Ï
Legacy form
&Iuml (no semicolon)
Code point
U+00CF
Unicode name
LATIN CAPITAL LETTER I WITH DIAERESIS
Block
Latin-1 Supplement
Category
Uppercase letter (Lu)
Since
Unicode 1.1
Defined in
HTML 4.01 and HTML5

Codes to copy

HTML namedÏWorks in HTML; in XML only & < > " ' are predefined.
HTML decimalÏWorks in HTML and XML.
HTML hexÏWorks in HTML and XML.
CSScontent: "\CF";In a stylesheet, for ::before and ::after.
JavaScript"\u00CF"Also valid in JSON.
Python"\u00cf"Python 3 string literal.
Python by name"\N{LATIN CAPITAL LETTER I WITH DIAERESIS}"Readable alternative using the Unicode name.
URL%C3%8FPercent-encoded UTF-8 bytes, for a path or query value.
UTF-8 bytesC3 8F2 bytes.
UTF-1600CF1 code unit, which is what JavaScript length counts.

When to use it

Ï writes U+00CF (Capital I with Diaeresis), a capital letter from the Unicode Latin-1 Supplement block, encoded since Unicode 1.1. On a page saved as UTF-8 the letter can simply be typed; the entity helps in ASCII-only templates and code samples.

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

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

More latin letters with accents

All latin letters with accents · 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).