Url Encoding

Some error messages

What is Url Encoding?

URL encoding, also known as percent-encoding, is a mechanism used to represent characters in a URL (Uniform Resource Locator) or URI (Uniform Resource Identifier) that cannot be represented by alphanumeric characters or symbols reserved for special purposes in URLs.

In URL encoding, characters are replaced by a percent sign "%" followed by two hexadecimal digits that represent the ASCII code of the character. For example:

  • The space character (" ") is replaced by "%20".
  • The plus sign ("+") is also often used to represent space characters, particularly in query strings.

URL encoding is typically used for the following purposes:

  1. Encoding special characters: Characters such as space, ampersand, question mark, and others have special meanings in URLs. URL encoding ensures these characters are correctly interpreted and transmitted.

  2. Passing data in URLs: Data passed in URL parameters or segments may contain characters that need to be URL encoded to avoid confusion or misinterpretation.

  3. Internationalization: URL encoding allows non-ASCII characters (Unicode characters) to be represented in URLs, ensuring compatibility across different systems and protocols.