What are the characters are not allowed in url..?

Question

Can anyone help me for my below question..? What are the characters are not allowed in url..?

Vulpes · Answer

It's easier to list what characters are allowed though (as usual) matters are not entirely straightforward as some characters may need to be 'percent' encoded. Check out these Wikipedia threads: http://en.wikipedia.org/wiki/Uniform_resource_locator http://en.wikipedia.org/wiki/Percent-encoding