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. This free online URL Encoder/Decoder tool will do the job if you want to get your URL encoded or decoded. This online 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. 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 source. In order to use this tool add enter a URL or text in the text field provided above. Then, all you have to do is to click on the Encode or Decode button, and it will show the results instantly.