You can read one of dozens of articles on the U.S. attempts to extradite him and their current appeal in the UK courts to do just that. You are simply wrong.

Edit: For anyone else misinformed about whether Assange is being charged and faced with extradition:

"A British judge on Wednesday denied bail to WikiLeaks’ founder Julian Assange, ordering him to remain in a high-security prison while U.K. courts decide whether he will be sent to the United States to face espionage charges...

Lawyers for the U.S. government have appealed the decision not to extradite Assange, and the case will be heard by Britain’s Hugh Court at an unspecified date."

Source

You can read one of dozens of articles on the U.S. attempts to extradite him and their current appeal in the UK courts to do just that. You are simply wrong.