Reserved characters

Reserved characters should not be encoded when they appear in their conventional meaning

in a URL. For example, do not encode the slash ( / ) when using it as part of the URL syntax.

Only encode unsafe characters (defined below) in your URLs.

The following table lists reserved characters.

Characters
$
&
+
,
/
:
;
=
?
@
Dollar
Ampersand
Plus
Comma
Forward slash / virgule
Colon
Semi-colon
Equal
Question mark
“At” symbol
24
26
2B
2C
2F
3A
3B
3D
3F
40
36
38
43
44
47
58
59
61
63
64
Hex Dec
Unsafe characters

URLs use some characters for “special use” in defining their syntax and should be encoded.

For various reasons, these characters present the possibility of being misunderstood within a

URL and are therefore considered “unsafe.”

The following table lists unsafe characters.

Characters
Miscellaneous characters
" "
<
>
#
%
{
}
|
\
^
~
[
]
`
Pound
Space
Percent
Quotation marks
“Less than” symbol
“Greater than” symbol
Left curly brace
Right curly brace
Vertical bar / pipe
Backslash
Caret
Tilde
Left square bracket
Right square bracket
Grave accent
20
23
22
3C
3E
25
7B
7D
7C
5C
5E
7E
5B
5D
60
Hex
32
35
123
125
124
92
94
126
91
93
96
34
60
62
37
Dec

IPL T CR48 • Communication and Control 27