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What is URL?

URL stands for Uniform Resource Locator. It is actually a web address. A URL can contain words i.e. ( or an Internet Protocol (IP) address i.e. But most of the user use URL in the form of words because it is easy to remember than numbers.

Syntax of a URL:


  • scheme is used to define the type of Internet service (most common is http or https).
  • prefix is used to define a domain prefix (default for http is www).
  • domain is used to define the Internet domain name (like
  • port is used to define the port number at the host (default for http is 80).
  • path is used to define a path at the server (If omitted: the root directory of the site).
  • filename is used to define the name of a document or resource.

Following is a list of some common types of schemes used in URL:

  • 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.

URL Encoding

URL encoding is used to convert non-ASCII characters into a format that can be used over the Internet because a URL is sent over the Internet by using the ASCII character-set only. If a URL contains characters outside the ASCII set, the URL has to be converted.

In URL encoding, the non-ASCII characters are replaced with a "%" followed by hexadecimal digits.

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

Following is a list of some character sets which are encoded by browser after submitting the text.

url encode

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