ASCII Hex Table — Decimal, Hexadecimal, Binary & HTML Entities

A comprehensive reference table for standard 7-bit ASCII character encodings — including Decimal, Hexadecimal (Hex), Binary, and HTML entity equivalents.

Dec	Hex	Binary	Char	HTML Entity	Category & Description
`0`	`0x00`	`00000000`	NUL	``	[Control] Null Character
`9`	`0x09`	`00001001`	HT	` `	[Control] Horizontal Tab ( )
`10`	`0x0A`	`00001010`	LF	` `	[Control] Line Feed / Newline ( )
`13`	`0x0D`	`00001101`	CR	` `	[Control] Carriage Return ( )
`32`	`0x20`	`00100000`	Space	` `	[Printable] Space Character
`33`	`0x21`	`00100001`	!	`!`	[Printable] Exclamation Mark
`35`	`0x23`	`00100011`	#	`#`	[Printable] Number Sign / Hash
`36`	`0x24`	`00100100`	$	`$`	[Printable] Dollar Sign
`38`	`0x26`	`00100110`	&	`&`	[Printable] Ampersand
`48`	`0x30`	`00110000`	0	`0`	[Digit] Digit Zero
`49`	`0x31`	`00110001`	1	`1`	[Digit] Digit One
`57`	`0x39`	`00111001`	9	`9`	[Digit] Digit Nine
`65`	`0x41`	`01000001`	A	`A`	[Uppercase] Latin Capital Letter A
`66`	`0x42`	`01000010`	B	`B`	[Uppercase] Latin Capital Letter B
`90`	`0x5A`	`01011010`	Z	`Z`	[Uppercase] Latin Capital Letter Z
`97`	`0x61`	`01100001`	a	`a`	[Lowercase] Latin Small Letter a
`98`	`0x62`	`01100010`	b	`b`	[Lowercase] Latin Small Letter b
`122`	`0x7A`	`01111010`	z	`z`	[Lowercase] Latin Small Letter z
`127`	`0x7F`	`01111111`	DEL	``	[Control] Delete Character

Understanding the ASCII Standard & Hex Conversion

ASCII (American Standard Code for Information Interchange) assigns numerical values from 0 to 127 to letters, numbers, punctuation, and system control signals:

Control Characters (0–31 & 127): Non-printable system characters like 0x0A (Line Feed) and 0x0D (Carriage Return).
Printable ASCII Characters (32–126): Standard text characters including numbers, capital letters (0x41 = A), and lowercase letters (0x61 = a).

Character Encoding & Modern Extensions

While standard ASCII is a 7-bit character set (128 characters), modern software defaults to extended 8-bit or multi-byte character sets such as UTF-8 and ISO-8859-1. Because UTF-8 is fully backward-compatible, the first 128 characters of UTF-8 share the exact same ASCII hex code values shown in the table above.

Reference Guides

8-Bit Binary & ASCII Table