HTML entity

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About

An HTML entity is a combination of characters which will be displayed within an HTML browser as a single character. All HTML entities begin with "&" (ampersand) and end with ";" (semicolon). Many entities have mnemonic names (such as "&", which displays an ampersand); any possible character can be displayed as an entity by using the format "&#number;" where number is the output character's ASCII value in decimal.

see also: wikipedia:Percent-encoding

Reference

Wikipedia
HTML 4.0 entities
Named character references, in alphabetical order, including newer ones not supported by most browsers
HTML Entity List: "Complete list of HTML entities with their numbers and names. Also included is a full list of ASCII characters that can be represented in HTML (i.e. printable characters)."

Questions

Does Google resolve html entities when indexing web pages? That is, if I spelled a word (e.g. "schmerglefrotz") entirely using html entities, would someone be able to find that page using google by typing "schmerglefrotz" (after the site had been spidered, of course)? (As a test, I will spell a completely different word using HTML entities, and try Googling it later: FRELGKLOTZ)
- 2007-07-15 answer: Yes, it does find it (though it took several months at least before this page got indexed).
- 2016-11-28 answer: Searching for the word in question no longer produces any results. Neither does searching for "schmerglefrotz".

Note

2017-11-11 MediaWiki 1.28.0 apparently no longer supports the "&#d;" style of entity; you now have to use named entities.
2020-05-23 This seems to have been fixed?

Entities by Number

0-8 are not translated
9 is probably TAB
10 is probably LF
13 is probably CR
14-31 are not translated
32 is a standard space

lower ASCII upper ASCII

`!`	!
`"`	"
`#`	#
`$`	$
`%`	%
`&`	& `&` : &
`'`	'
`(`	(
`)`	)
`*`	*
`+`	+
`,`	,
`-`	-
`.`	.
`/`	/
`0`	0
`1`	1
`2`	2
`3`	3
`4`	4
`5`	5
`6`	6
`7`	7
`8`	8
`9`	9
`:`	:
`;`	;
`<`	<
`=`	=
`>`	>
`?`	?
`@`	@

A	A
B	B
C	C
D	D
E	E
F	F
G	G
H	H
I	I
J	J
K	K
L	L
M	M
N	N
O	O
P	P
Q	Q
R	R
S	S
T	T
U	U
V	V
W	W
X	X
Y	Y
Z	Z
[	[
\	\
]	]
^	^
_	_
`	`

a	a
b	b
c	c
d	d
e	e
f	f
g	g
h	h
i	i
j	j
k	k
l	l
m	m
n	n
o	o
p	p
q	q
r	r
s	s
t	t
u	u
v	v
w	w
x	x
y	y
z	z
{	{
	\|
}	}
~	~

























	™

¡	¡
¢	¢
£	£ £
¤	¤
¥	¥
¦	¦
§	§ §
¨	¨
©	© ©
ª	ª
«	«
¬	¬

®	®
¯	¯
°	°
±	±
²	²
³	³
´	´
µ	µ
¶	¶
·	·
¸	¸
¹	¹
º	º
»	»
¼	¼
½	½
¾	¾
¿	¿
À	À À

Á	Á Á
Â	Â
Ã	Ã Ã
Ä	Ä Ä
Å	Å
Æ	Æ Æ
Ç	Ç Ç
È	È
É	É
Ê	Ê
Ë	Ë
Ì	Ì
Í	Í
Î	Î
Ï	Ï
Ð	Ð
Ñ	Ñ
Ò	Ò
Ó	Ó
Ô	Ô
Õ	Õ
Ö	Ö
×	×
Ø	Ø
Ù	Ù
Ú	Ú
Û	Û
Ü	Ü
Ý	Ý
Þ	Þ
ß	ß
à	à

á	á
â	â
ã	ã
ä	ä
å	å
æ	æ
ç	ç ç
è	è
é	é
ê	ê
ë	ë
ì	ì
í	í
î	î
ï	ï
ð	ð
ñ	ñ
ò	ò
ó	ó
ô	ô
õ	õ
ö	ö
÷	÷
ø	ø ø
ù	ù
ú	ú
û	û
ü	ü
ý	ý
þ	þ þ
ÿ	ÿ
Ā	Ā

Entities by Appearance

’ : ’ - right single-quote
‘ : ‘ - left single-quote
Α : Α - Greek letter alpha (upper)
Β : Β - Greek letter beta (upper)
Γ : Γ - Greek letter gamma (upper)
Δ : Δ - Greek letter delta (upper)
α : α - Greek letter alpha (lower)
β : β - Greek letter beta (lower)
γ : γ - Greek letter gamma (lower)
δ : δ - Greek letter delta (lower)

Roman alphabet

upper	lower	mnemonics
`Á` : Á - A with acute accent	`á` : á - a with acute accent	`Á` : Á `á` : á
	`ā` : ā - a with macron
	`ă` : ă - a with caron
`Č` : Č - C with caron	`č` : č - c with caron	`&Ccaron;` : &Ccaron; `&ccaron;` : &ccaron;

Links

Wikipedia - a more complete list