"Jump around. This power-up lets you jump three times higher than normal. You can reach parts of the maps that you would not normally see. Jumping around also makes you a target that is hard to hit, although watch out for those snipers." — World of Padman Manual

Jumper is a powerup that allows the player to jump much higher than normal for 30 seconds, also capable of reaching certain areas which are normally impossible to reach.

Although it is stated in the manual that the powerup allows the player to jump three times higher, technically it is approximately 6.3 times higher. The normal jump height is 48 units provided both /sv_fps 125 and /g_synchronousClients 1 are set in console. With the Jumper powerup the player can jump 304 units.