Cartoon Network HD is the network's high definition feed, it was launched in the United States on October 15, 2007 and is carried on most cable and satellite providers.
On February 23, 2015, Cartoon Network HD was released on Chile by VTR GLOBALCOM S.A Chile.
As of July 28, 2015, for Europe and Ireland, HD bug are removed for this network and the high definition feed is downscaled by the provider for the standard definition feed, resulting in all programming appearing in a 16:9 ratio with letterboxing. Unlike the other Turner networks in Europe, United Kingdom, Ireland, standard definition advertising is also stretched into 16:9 mode.
On September 28, 2017, Cartoon Network brought back the HD-availability lower third, which started appearing in 2008 on the standard-definition feed.
On September 30, 2017, Cartoon Network in 16:9-sourced stretched letterbox content is dissoved and unstretched to fill the 4:3 aspect ratio. The network's SD content airs on standard definition channel, Unlike the other Turner networks, standard definition advertising is also unstretched into 4:3 mode.
And October 1, 2017, Cartoon Network brought back the "HD" Text from the HD feed's screen bug
In 2017, a new HD bug was used for the United Kingdom.