The Pirate Bay is a widely popular file-sharing website predominantly used to share copyrighted material free of charge, and despite the criminal convictions, the site remains functioning today, although it has moved to different Web domains several times.

It's still unclear how the website managed to reappear every time after shutdown, but The Pirate Bay claimed last year that it ran the notorious website on 21 "raid-proof" virtual machines, which means if the police raid one location, the site would hardly take few hours to get back in action.

Neij is expected to return now to his house in Laos where he previously lived with his wife and children.

He is the last founder of The Pirate Bay to be released from prison.