US court documents show Mr Assange is accepting a guilty verdict for violating America's espionage law.
He won't face a further prison sentence after receiving credit for time already served.
Assange was freed from Belmarsh Prison in London and is returning to Australia.
Julian Assange's wife Stella Assange released a video marking the release.
IN: "This period...
OUT: ...to freedom."
DUR: 14 seconds
http://www.fsnradionews.com/feeds/0625assange-assange1.mp3