Jon is the only character in the Watchmen series to explicitly possess superhuman abilities (although the details of the plot presuppose the existence of genuine human psychics). Throughout Watchmen, he is shown to be immensely powerful and seemingly invulnerable to all harm; even when his body is disintegrated, he can reconstruct it from atoms (in less than a minute the second time this happened). Jon has complete awareness of and control over atomic and subatomic particles. He can alter his body's size, coloration, density, and strength. He does not age or need food, water, or air, and is, for all intents and purposes, immortal. He can teleport himself and others over great (even interplanetary and perhaps intergalactic) distances.
Jon's near-limitless powers are further amplified in comparison to the apparent lack of any other "super-powered" individuals. Although Veidt is obviously the second-most dangerous character in the series, as Jon himself observes, "...the world's smartest man means no more to me than its smartest termite."
In addition to these powers, Jon is able to phase any part of his body through solid objects without damaging them, produce multiple copies of himself which function independently of each other, project destructive energy, disintegrate people (possibly by removing their intrinsic fields) create force fields, transmute and create matter, move objects without physically touching them (telekinesis), reverse entropy, and, he suggests, create life and walk on the surface of the sun. At one point it is stated that, in the event of a nuclear war, he would be capable of destroying upwards of 99% of all Soviet nuclear missiles while at the same time 'destroying' large areas of Russia. As a result of these capabilities, Jon becomes central to the United States' Cold War strategy of deterrence.
Due to his non-linear perception of time, he sees the past, present and future simultaneously.