This tool encodes or decodes the given URL.
Encoding converts the characters into a format that can be transmitted over the Internet.Encoding allows HTTP requests to work with ease.This is also known as Percentage encoding.Since URLs can be sent only in ASCII characters over the internet, encoding is the proper way of doing so.
For more information URL encoding/decoding
Decoding of the encoded URL reverts back to human readable URL.
e.g. Encoded URL : https%3A%2F%2Fwww.google.com%2F
Normal/Decoded URL : https://www.google.com/