U+00FF was added to Unicode in version 1.1 (1993). It belongs to the block Latin-1 Supplement in the Basic Multilingual Plane.

This character is a Lowercase Letter and is mainly used in the Latin script. It is related to its uppercase variant Ÿ and its titlecase variant Ÿ.

The glyph is a Canonical composition of the glyphs y ̈. It has a Neutral East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. In text U+00FF behaves as Alphabetic regarding line breaks. It has type Lower for sentence and ALetter for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

The diaeresis (/daɪˈɛrɨsɨs/, dy-ERR-ə-səs; plural: diaereses), also spelled diæresis or dieresis and also known as the trema or the umlaut, is a diacritical mark that consists of two dots ( ¨ ) placed over a letter, usually a vowel. When that letter is an i or a j, the diacritic replaces the tittle: ï.

The diaeresis and the umlaut are diacritics marking two distinct phonological phenomena. The diaeresis represents the phenomenon also known as diaeresis or hiatus in which a vowel letter is not pronounced as part of a digraph or diphthong. The umlaut (/ˈʊmlaʊt/ UUM-lowt), in contrast, indicates a sound shift. These two diacritics originated separately; the diaeresis is considerably older. Nevertheless, in modern computer systems using Unicode, the umlaut and diaeresis diacritics are identical, e.g. U+00E4 ä latin small letter a with diaeresis (HTML ä · ä) represents both a-umlaut and a-diaeresis.

The same symbol is also used as a diacritic in other cases, distinct from both diaeresis and umlaut. For example, in Albanian, ë represents a schwa.


System Representation
UTF-16 00 FF
UTF-32 00 00 00 FF
URL-Quoted %C3%BF
HTML-Escape ÿ
Wrong windows-1252 Mojibake ÿ
HTML-Escape ÿ
digraph y:
LaTeX \"{y}
Encoding: ISO-8859-14 (hex bytes) FF
Encoding: ISO-8859-15 (hex bytes) FF
Encoding: ISO-8859-16 (hex bytes) FF
Encoding: MACINTOSH (hex bytes) D8
Encoding: WINDOWS-1252 (hex bytes) FF
Encoding: WINDOWS-1254 (hex bytes) FF
Encoding: WINDOWS-1258 (hex bytes) FF

Related Characters

  • Ÿ


Complete Record

Property Value
Age (age) 1.1
Block (blk) Latin_1_Sup
General Category (gc) Lowercase Letter
Script (sc) Latin
Bidirectional Category (bc) Left To Right
Combining Class (ccc) Not Reordered
Decomposition Type (dt) Canonical
Decomposition Mapping (dm) y ̈
Lowercase (Lower)
Simple Lowercase Mapping (slc) ÿ
Lowercase Mapping (lc) ÿ
Uppercase (Upper)
Simple Uppercase Mapping (suc) Ÿ
Uppercase Mapping (uc) Ÿ
Simple Titlecase Mapping (stc) Ÿ
Titlecase Mapping (tc) Ÿ
Case Folding (cf) ÿ
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Bidi Paired Bracket (bpb) ÿ
Bidi Paired Bracket Type (bpt) None
Cased (Cased)
Composition Exclusion (CE)
Case Ignorable (CI)
Full Composition Exclusion (Comp_Ex)
Changes When Casefolded (CWCF)
Changes When Casemapped (CWCM)
Changes When NFKC Casefolded (CWKCF)
Changes When Lowercased (CWL)
Changes When Titlecased (CWT)
Changes When Uppercased (CWU)
Dash (Dash)
Deprecated (Dep)
Default Ignorable Code Point (DI)
Diacritic (Dia)
East Asian Width (ea) Neutral
Extender (Ext)
FC NFKC Closure (FC_NFKC) ÿ
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base)
Grapheme Extend (Gr_Ext)
Hex Digit (Hex)
Hangul Syllable Type (hst) Not Applicable
Hyphen (Hyphen)
ID Continue (IDC)
Ideographic (Ideo)
ID Start (IDS)
IDS Binary Operator (IDSB)
IDS Trinary Operator and (IDST)
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
ISO 10646 Comment (isc)
Joining Group (jg) No_Joining_Group
Join Control (Join_C)
Jamo Short Name (JSN)
Joining Type (jt) Non Joining
Line Break (lb) Alphabetic
Logical Order Exception (LOE)
Math (Math)
Noncharacter Code Point (NChar)
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) No
NFKC Casefold (NFKC_CF) ÿ
NFKC Quick Check (NFKC_QC) Yes
NFKD Quick Check (NFKD_QC) No
Numeric Type (nt) None
Numeric Value (nv) NaN
Other Alphabetic (OAlpha)
Other Default Ignorable Code Point (ODI)
Other Grapheme Extend (OGr_Ext)
Other ID Continue (OIDC)
Other ID Start (OIDS)
Other Lowercase (OLower)
Other Math (OMath)
Other Uppercase (OUpper)
Pattern Syntax (Pat_Syn)
Pattern White Space (Pat_WS)
Quotation Mark (QMark)
Radical (Radical)
Sentence Break (SB) Lower
Simple Case Folding (scf) ÿ
Script Extension (scx) Latin
Soft Dotted (SD)
STerm (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) ALetter
White Space (WSpace)
XID Continue (XIDC)
XID Start (XIDS)
Expands On NFC (XO_NFC)
Expands On NFD (XO_NFD)
Expands On NFKC (XO_NFKC)
Expands On NFKD (XO_NFKD)