On October 15, 2007, Cartoon Network launched its HD simulcast feed under the name "Cartoon Network HD".
2010–Present (USA); 2011–2015 (Europe, United Kingdom, Ireland)
In Late 2017, Cartoon Network standard-definition viewers is no longer HD letterbox format to see the picture and unstretched to 4:3 Standard Definition feed and the return the HD Lower Third. At 6:00am ET on October 1, Cartoon Network brought back the HD symbol from its screen-bug. That means the standard definition programs is back to Cartoon Network on TV.
| Part of Time Warner