URL Encoder/Decoder tool is extremely helpful when adding special characters to a URL parameter which is also known often referred to as percent encoding.
URL encoding is generally used in the query string or also known as the Uniform Resource Identifier (URI). Users only really want to use URL encoding on the special symbols.
The process of URL encoding involves replacement of unallowable characters with a % (percent sign) and additional two hexadecimal values. While URL decoding works, if you want to know an email campaign or the newsletter's source.
URLs can only be carried over to the Internet using the ASCII character-set. Since these URLs comes with characters outside the ASCII set, the URL needs to be converted into a useable ASCII format. This URL encoding is used to replace unsafe ASCII characters with a percent sign (%) followed by two hexadecimal digits. URL encoding replaces a space with either a plus sign (+) or with %20.