Character Encoding
UTF-8
0xF20x9F0xBF0xBF
UTF-16
0xDA3F0xDFFF
UTF-32
0x0009FFFF
Copy & Paste Codes
Unicode Escape
\u{9FFFF}
HTML Entity (Decimal)

HTML Entity (Hex)

CSS Code
\9FFFF
JavaScript/JSON
String.fromCodePoint(0x9FFFF)
Python
chr(0x9FFFF)
Ruby/PHP
chr(0x9FFFF)
Unix, C, PHP, JAVA
0x9FFFF
Perl
chr(0x9FFFF)
URL Encoded
%9ffff