REPLACEMENT CHARACTER

Codepoint
U+FFFD
Literal Character
Name
REPLACEMENT CHARACTER
Sketch
........
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Control Character
no
Block
Specials
Subblock
Replacement characters
UTF-8 byte encoding
ef bf bd
UTF-16 byte encoding
ff fd (big endian)
HTML Entity
�
Perl string literal
\x{FFFD}
Comments
  • used to replace an incoming character whose value is unknown or unrepresentable in Unicode
  • compare the use of 001A as a control character to indicate the substitute function
  • may be used to detect byte order by contrast with FEFF
See Also
U+2BD1: uncertainty sign
U+1FBC4: negative squared question mark
U+FEFF: zero width no-break space