In the 7-bit ASCII character set, ASCII code 91 is represented by the character [ also known as the opening bracket.

Character Representation Value/Description
ASCII Character [
Decimal 91
Octal 133
Hexadecimal 5B
Binary 0101 1011
Description Opening bracket
Category Printable Characters
Subcategory Punctuation and Symbols
Unicode U+005B

Encoding

Encoding non-standard letters and characters into values that can be displayed e.g. in browsers

Encoding Method Encoded Value
URL Escape Code %5B
Quoted-printable =5B