Young Melbourne dark-web paedophile Matthew Graham, 23, has been sentenced to 15 years in jail for crimes a judge described as "pure evil".

Graham was known online as 'Lux'. He ran an empire of hidden websites for two years from his bedroom at his parents' home in South Morang between the ages of 19 and 21.

Matthew Graham has admiited 13 horrific child pornography, child abuse and "hurtcore" charges.

The websites - obscured from general online browsing by the Tor network - specialised in the torture, rape and sexual abuse of children.

On Thursday County Court judge Michael Tinney said on Thursday that the extraordinary, shocking case was unprecedented and Graham had fulfilled his aim of being the biggest child pornography and "hurtcore" distributor in the world.