As they launch the supernanny committee:
Ministers are planning to introduce tough new rules to make websites carry age certificates and warning signs on films featuring sex, violence or strong language.
Culture Secretary Andy Burnham said that tougher content guidance would help parents monitor their children's internet use.
The move is in response to growing fears about the internet's 'dark side'. An influential group of MPs recently warned that many social networking and video-sharing websites contain material unsuitable for children.
Mr Burnham said he wanted online content to meet the same standards required for television and the cinema. At the moment, there is no overall regulation of the internet.
The Culture Secretary said video clips may soon have to carry ratings such as the 'U', 'PG', '12' and '18' ones used by cinemas.
Mr Burnham pointed to the example of the BBC iplayer which carries content warnings on programmes screened after the 9pm watershed and allows parents to turn on a 'parental guidance lock' to stop youngsters accessing inappropriate material.
He said: 'With the 9pm watershed, parents had complete clarity about the content. But with the internet, parents are ensure about what is appropriate and what isn't.
'We have to start talking more seriously about standards and regulation on the internet.
'I don't think it is impossible that before you download something there is a symbol or wording which tells you what's in that content. If you have a clip that is downloaded a million times then that is akin to broadcasting.'It doesn't seem over-burdensome for these to be regulated.'
His comments were backed by the Home Secretary Jacqui Smith who said she had been 'shocked' at some of the material viewed by her sons.