This parser breaks HTTP GET request string to parameters (name-value pairs) and decodes URL-encoded values if needed. I guess if person knows what is HTTP GET request, there is nothing to explain here. I needed this one for work, so I've wrote it. Enjoy.
Save the calculation to reuse next time, to extension embed in your website or share share with friends.
P.S. This one - URL-encoded string decoder might be useful as well