Character Encoding
UTF-8
0xF30xAF0xBF0xBF
UTF-16
0xDB7F0xDFFF
UTF-32
0x000EFFFF
Copy & Paste Codes
Unicode Escape
\u{EFFFF}
HTML Entity (Decimal)

HTML Entity (Hex)

CSS Code
\EFFFF
JavaScript/JSON
String.fromCodePoint(0xEFFFF)
Python
chr(0xEFFFF)
Ruby/PHP
chr(0xEFFFF)
Unix, C, PHP, JAVA
0xEFFFF
Perl
chr(0xEFFFF)
URL Encoded
%effff