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HTML URL Encode

• URL stands for Uniform Resource Locator can be simply understand as a web address.
• It is used to access the content of a websites.
• URL can either be in words or in numbers.

URL encoding is the practice of translating unprintable characters or characters with special meaning within URLs to a representation that is unambiguous and universally accepted by web browsers and servers.

These characters include:

• ASCII control characters
• Non-ASCII control characters
• Reserved characters
• Unsafe characters

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Common URL Schemes

Scheme	Stands for	Used for
http	HyperText Transfer Protocol	Common web pages. Not encrypted
https	Secure HyperText Transfer Protocol	Secure web pages. Encrypted
ftp	File Transfer Protocol	Downloading or uploading files
file	-	A file on your computer

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URL Encoding

There are certain characters which sometimes have special meanings in the URL and it can be used in both ways. According to RFC 3986, the characters in a URL only limited to a defined set of reserved and unreserved US-ASCII characters.

Any other characters are not allowed in a URL. But URL often contains characters outside the US-ASCII character set, so they must be converted to a valid US-ASCII format for worldwide interoperability. URL-encoding, also known as percent-encoding is a process of encoding URL information so that it can be safely transmitted over the internet.

ASCII Encoding

The browser will encode input according to the character-set used in the page.

The default character-set in HTML5 is UTF-8.

Decimal	Character	URL Encode
0	-	%00
1	-	%01
2	-	%02
3	-	%03
4	-	%04
5	-	%05
6	-	%06
7	-	%07
8	backspace	%08
9	tab	%09
10	linefeed	%0a
11	-	%0b
12	-	%0c
13	carriage return	%0d
14	-	%0e
15	-	%0f
16	-	%10
17	-	%11
18	-	%12
19	-	%13
20	-	%14
21	-	%15
22	-	%16
23	-	%17
24	-	%18
25	-	%19
26	-	%1a
27	-	%1b
28	-	%1c
29	-	%1d
30	-	%1e
31	-	%1f

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