HTML Uniform Resource Locators

URL stands for Uniform Resource Locator it is another for web addresss.

A URL can be composed of words welookups.com or an Internet Protocol (IP) address (

Enter the name is more easier than IP number

URL - Uniform Resource Locator

Web browsers request pages from web servers by using a URL.

When you click on a link in an HTML page, an underlying <a> tag points to an address on the web.

A Uniform Resource Locator (URL) is used to address a document (or other data) on the web.

A web address, like http://www.welookups.com/html/default.html follows these syntax rules:



  • scheme - defines the type of most common is http)
  • prefix - defines a domain prefix (default for http is www)
  • domain - defines the Internet domain name (welookups.com)
  • port - defines the port number at the host (default for http is 80)
  • path - defines a path at the server (If omitted: the root directory of the site)
  • filename - defines the name of a document or resource

Common URL Schemes

The table below lists some common schemes:

Scheme full form Used for
http HyperText Transfer Protocol Common web pages. it is Not encrypted
https Secure HyperText Transfer Protocol Secure web pages. it is Encrypted
ftp File Transfer Protocol Downloading(client side) or uploading files(server side)
file   A file on your computer

URL Encoding

URLs can only be sent over the Internet using the ASCII character-set. If a URL contains characters outside the ASCII set, the URL has to be converted.

URL encoding converts non-ASCII characters into a format that can be transmitted over the Internet.

URL encoding replaces non-ASCII characters with a "%" followed by hexadecimal digits.

URLs cannot contain spaces. URL encoding normally replaces a space with a plus (+) sign, or %20.

If you click "Submit", the browser will URL encode the input before it is sent to the server.

A page at the server will display the received input.

Try some other input and click Submit again.

ASCII Encoding Examples

browser will encode when you enter character

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

Character From Windows-1252 From UTF-8
%10 %E2%82%AC
£ %A3 %C2%A3
© %A9 %C2%A9
® %AE %C2%AE
À %C0 %C3%80
Á %C1 %C3%81
 %C2 %C3%82
à %C3 %C3%83
Ä %C4 %C3%84
Å %C5 %C3%85