Police says the charges include five counts of rape, four of indecent treatment of children and eight of grooming children to engage in sexual acts.
The man, from Warwick in south-east Queensland, committed the offences between 2002 and 2015.
Meanwhile Police have identified 28 alleged child victims.
The victims were identified in Queensland, New South Wales and Victoria.
Police say the man, targeted children on a variety of social media sites, using names including Jazz, Jazzman and David Bourne.