ASCII Table Reference

Complete ASCII character table with decimal, hexadecimal, binary, and octal representations. Click any row to copy the value.

Showing 128 of 128 characters — click any value to copy

Binary	Oct	Char	HTML	Description
00000000	000	NUL	—	NUL — Null
00000001	001	SOH	—	SOH — Start of Heading
00000010	002	STX	—	STX — Start of Text
00000011	003	ETX	—	ETX — End of Text
00000100	004	EOT	—	EOT — End of Transmission
00000101	005	ENQ	—	ENQ — Enquiry
00000110	006	ACK	—	ACK — Acknowledge
00000111	007	BEL	—	BEL — Bell
00001000	010	BS	—	BS — Backspace
00001001	011	HT	—	HT — Horizontal Tab
00001010	012	LF	—	LF — Line Feed
00001011	013	VT	—	VT — Vertical Tab
00001100	014	FF	—	FF — Form Feed
00001101	015	CR	—	CR — Carriage Return
00001110	016	SO	—	SO — Shift Out
00001111	017	SI	—	SI — Shift In
00010000	020	DLE	—	DLE — Data Link Escape
00010001	021	DC1	—	DC1 — Device Control 1 (XON)
00010010	022	DC2	—	DC2 — Device Control 2
00010011	023	DC3	—	DC3 — Device Control 3 (XOFF)
00010100	024	DC4	—	DC4 — Device Control 4
00010101	025	NAK	—	NAK — Negative Acknowledge
00010110	026	SYN	—	SYN — Synchronous Idle
00010111	027	ETB	—	ETB — End of Transmission Block
00011000	030	CAN	—	CAN — Cancel
00011001	031	EM	—	EM — End of Medium
00011010	032	SUB	—	SUB — Substitute
00011011	033	ESC	—	ESC — Escape
00011100	034	FS	—	FS — File Separator
00011101	035	GS	—	GS — Group Separator
00011110	036	RS	—	RS — Record Separator
00011111	037	US	—	US — Unit Separator
00100000	040		—	Space
00100001	041		—	Exclamation mark
00100010	042			Double quote
00100011	043		—	Hash / Number sign
00100100	044		—	Dollar sign
00100101	045		—	Percent sign
00100110	046			Ampersand
00100111	047			Apostrophe
00101000	050		—	Left parenthesis
00101001	051		—	Right parenthesis
00101010	052		—	Asterisk
00101011	053		—	Plus sign
00101100	054		—	Comma
00101101	055		—	Hyphen / Minus
00101110	056		—	Period / Full stop
00101111	057		—	Forward slash
00110000	060		—	Digit 0
00110001	061		—	Digit 1
00110010	062		—	Digit 2
00110011	063		—	Digit 3
00110100	064		—	Digit 4
00110101	065		—	Digit 5
00110110	066		—	Digit 6
00110111	067		—	Digit 7
00111000	070		—	Digit 8
00111001	071		—	Digit 9
00111010	072		—	Colon
00111011	073		—	Semicolon
00111100	074			Less-than sign
00111101	075		—	Equals sign
00111110	076			Greater-than sign
00111111	077		—	Question mark
01000000	100		—	At sign
01000001	101		—	Uppercase letter A
01000010	102		—	Uppercase letter B
01000011	103		—	Uppercase letter C
01000100	104		—	Uppercase letter D
01000101	105		—	Uppercase letter E
01000110	106		—	Uppercase letter F
01000111	107		—	Uppercase letter G
01001000	110		—	Uppercase letter H
01001001	111		—	Uppercase letter I
01001010	112		—	Uppercase letter J
01001011	113		—	Uppercase letter K
01001100	114		—	Uppercase letter L
01001101	115		—	Uppercase letter M
01001110	116		—	Uppercase letter N
01001111	117		—	Uppercase letter O
01010000	120		—	Uppercase letter P
01010001	121		—	Uppercase letter Q
01010010	122		—	Uppercase letter R
01010011	123		—	Uppercase letter S
01010100	124		—	Uppercase letter T
01010101	125		—	Uppercase letter U
01010110	126		—	Uppercase letter V
01010111	127		—	Uppercase letter W
01011000	130		—	Uppercase letter X
01011001	131		—	Uppercase letter Y
01011010	132		—	Uppercase letter Z
01011011	133		—	Left square bracket
01011100	134		—	Backslash
01011101	135		—	Right square bracket
01011110	136		—	Caret / Circumflex
01011111	137		—	Underscore
01100000	140		—	Backtick / Grave accent
01100001	141		—	Lowercase letter a
01100010	142		—	Lowercase letter b
01100011	143		—	Lowercase letter c
01100100	144		—	Lowercase letter d
01100101	145		—	Lowercase letter e
01100110	146		—	Lowercase letter f
01100111	147		—	Lowercase letter g
01101000	150		—	Lowercase letter h
01101001	151		—	Lowercase letter i
01101010	152		—	Lowercase letter j
01101011	153		—	Lowercase letter k
01101100	154		—	Lowercase letter l
01101101	155		—	Lowercase letter m
01101110	156		—	Lowercase letter n
01101111	157		—	Lowercase letter o
01110000	160		—	Lowercase letter p
01110001	161		—	Lowercase letter q
01110010	162		—	Lowercase letter r
01110011	163		—	Lowercase letter s
01110100	164		—	Lowercase letter t
01110101	165		—	Lowercase letter u
01110110	166		—	Lowercase letter v
01110111	167		—	Lowercase letter w
01111000	170		—	Lowercase letter x
01111001	171		—	Lowercase letter y
01111010	172		—	Lowercase letter z
01111011	173		—	Left curly brace
01111100	174		—	Vertical bar / Pipe
01111101	175		—	Right curly brace
01111110	176		—	Tilde
01111111	177	DEL	—	DEL — Delete

Most Important ASCII Codes

Reserved HTML Characters

38&&

60<<

62>>

34""

Common Control Codes

9TABHorizontal Tab

10LFLine Feed (\n)

13CRCarriage Return (\r)

27ESCEscape

Digits (48–57)

480Zero

491One

579Nine

→Add 48 to digit value

Uppercase (65–90)

65ACapital A

90ZCapital Z

→A=65, Z=90

→Diff to lower: +32

Lowercase (97–122)

97aSmall a

122zSmall z

→a=97, z=122

→Diff to upper: -32

Symbols & Punctuation

32SpaceWord separator

46.Period

95_Underscore

64@At sign

Frequently Asked Questions

What is ASCII?

ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding standard that maps 128 characters to integers 0–127. It includes control characters (0–31), printable characters (32–126), and the DEL character (127).

What is the difference between ASCII and Unicode?

ASCII encodes 128 characters using 7 bits. Unicode is a superset that encodes over 140,000 characters from all the world's writing systems. ASCII is fully compatible with UTF-8 Unicode — the first 128 code points are identical.

What are ASCII control characters?

Control characters (0–31) are non-printable codes that control how text is processed. Common ones include NUL (0), TAB (9), LF/newline (10), CR/carriage return (13), ESC (27), and DEL (127).

How do I use ASCII codes in HTML?

Use decimal entities like A for A or hex entities like A for A. For special characters, named entities like & for & are preferred when available.

Dec

Hex

Char

Description

NUL

NUL — Null

SOH

SOH — Start of Heading

STX

STX — Start of Text

ETX

ETX — End of Text

EOT

EOT — End of Transmission

ENQ

ENQ — Enquiry

ACK

ACK — Acknowledge

BEL

BEL — Bell

BS — Backspace

HT — Horizontal Tab

LF — Line Feed

VT — Vertical Tab

FF — Form Feed

CR — Carriage Return

SO — Shift Out

SI — Shift In

DLE

DLE — Data Link Escape

DC1

DC1 — Device Control 1 (XON)

DC2

DC2 — Device Control 2

DC3

DC3 — Device Control 3 (XOFF)

DC4

DC4 — Device Control 4

NAK

NAK — Negative Acknowledge

SYN

SYN — Synchronous Idle

ETB

ETB — End of Transmission Block

CAN

CAN — Cancel

EM — End of Medium

SUB

SUB — Substitute

ESC

ESC — Escape

FS — File Separator

GS — Group Separator

RS — Record Separator

US — Unit Separator

Space

Exclamation mark

Double quote

Hash / Number sign

Dollar sign

Percent sign

Ampersand

Apostrophe

Left parenthesis

Right parenthesis

Asterisk

Plus sign

Comma

Hyphen / Minus

Period / Full stop

Forward slash

Digit 0

Digit 1

Digit 2

Digit 3

Digit 4

Digit 5

Digit 6

Digit 7

Digit 8

Digit 9

Colon

Semicolon

Less-than sign

Equals sign

Greater-than sign

Question mark

At sign

Uppercase letter A

Uppercase letter B

Uppercase letter C

Uppercase letter D

Uppercase letter E

Uppercase letter F

Uppercase letter G

Uppercase letter H

Uppercase letter I

Uppercase letter J

Uppercase letter K

Uppercase letter L

Uppercase letter M

Uppercase letter N

Uppercase letter O

Uppercase letter P

Uppercase letter Q

Uppercase letter R

Uppercase letter S

Uppercase letter T

Uppercase letter U

Uppercase letter V

Uppercase letter W

Uppercase letter X

Uppercase letter Y

Uppercase letter Z

Left square bracket

Backslash

Right square bracket

Caret / Circumflex

Underscore

Backtick / Grave accent

Lowercase letter a

Lowercase letter b

Lowercase letter c

Lowercase letter d

Lowercase letter e

Lowercase letter f

Lowercase letter g

Lowercase letter h

Lowercase letter i

Lowercase letter j

Lowercase letter k

Lowercase letter l

Lowercase letter m

Lowercase letter n

Lowercase letter o

Lowercase letter p

Lowercase letter q

Lowercase letter r

Lowercase letter s

Lowercase letter t

Lowercase letter u

Lowercase letter v

Lowercase letter w

Lowercase letter x

Lowercase letter y

Lowercase letter z

Left curly brace

Vertical bar / Pipe

Right curly brace

Tilde

DEL

DEL — Delete

Most Important ASCII Codes

Reserved HTML Characters

38&&

60<<

62>>

34""

Common Control Codes

9TABHorizontal Tab

10LFLine Feed (\n)

13CRCarriage Return (\r)

27ESCEscape

Digits (48–57)

480Zero

491One

579Nine

→Add 48 to digit value

Uppercase (65–90)

65ACapital A

90ZCapital Z

→A=65, Z=90

→Diff to lower: +32

Lowercase (97–122)

97aSmall a

122zSmall z

→a=97, z=122

→Diff to upper: -32

Symbols & Punctuation

32SpaceWord separator

46.Period

95_Underscore

64@At sign

Frequently Asked Questions

What is ASCII?

What is the difference between ASCII and Unicode?

What are ASCII control characters?

Control characters (0–31) are non-printable codes that control how text is processed. Common ones include NUL (0), TAB (9), LF/newline (10), CR/carriage return (13), ESC (27), and DEL (127).

How do I use ASCII codes in HTML?

Use decimal entities like A for A or hex entities like A for A. For special characters, named entities like & for & are preferred when available.

ASCII Table Reference

Most Important ASCII Codes

Reserved HTML Characters

Common Control Codes

Digits (48–57)

Uppercase (65–90)

Lowercase (97–122)

Symbols & Punctuation

Frequently Asked Questions

Related Tools

References & cheat sheets

ASCII Table Reference

Most Important ASCII Codes

Reserved HTML Characters

Common Control Codes

Digits (48–57)

Uppercase (65–90)

Lowercase (97–122)

Symbols & Punctuation

Frequently Asked Questions

Related Tools