HTML entity

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` : À

`Á`	Á `Á` : Á
`Â`	Â
`Ã`	Ã `Ã` : Ã
`Ä`	Ä `Ä` : Ä
`Å`	Å
`Æ`	Æ `Æ` : Æ
`Ç`	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` : 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 `þ` : þ
`ÿ`	ÿ
`Ā`	Ā

Notes

2024-08-31  used to map to ™ : ™. That is either browser-specific or is no longer the case.

Entities by Appearance

← : ← - left arrow
→ : → - right arrow
‘ : ‘ - left single-quote
’ : ’ - right 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