Assange is being held at a British prison while fighting extradition to the United States on spying charges.
U.S. authorities accuse Assange of scheming with former Army intelligence analyst Chelsea Manning to break a password.
The extradition request had been expected ever since U.S. authorities first announced a criminal case against Assange.
The U.S. filed new charges against Julian Assange, accusing him of placing the United States at risk of serious harm.
Judge Deborah Taylor appeared unimpressed by Assange's written apology.
WikiLeaks founder Julian Assange has been under U.S. Justice Department scrutiny for years