Character Encoding
UTF-8
0xF30xAF0xBF0xBE
UTF-16
0xDB7F0xDFFE
UTF-32
0x000EFFFE
Copy & Paste Codes
Unicode Escape
\u{EFFFE}
HTML Entity (Decimal)

HTML Entity (Hex)

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