O
Uppercase O
PrintableASCII 79 | Hex 0x4F | U+004F
ASCII Code
Decimal
79
Hexadecimal
0x4F
Octal
117
Binary
0100 1111
URL Escape
%4F
How to Type
Windows Alt CodeAlt + 79
HTML Entity
O
Unicode InputU+004F
Frequently Asked Questions
What is ASCII code 79?
ASCII code 79 represents the Uppercase O character. In hexadecimal it is 0x4F, in binary 0100 1111, and in octal 117. It is a printable character that appears as "O" in text.
How do I type ASCII 79 on a keyboard?
On Windows, hold Alt and type 79 on the numeric keypad. On Mac, you can use the Character Viewer (Edit > Emoji & Symbols). In HTML, use the entity O or O.