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What is Mime Mouse?

Mime Mouse is a free, harmless prank program from RJL Software that randomly traps the mouse cursor inside an invisible box on the screen. Every 15 seconds, Mime Mouse creates a hidden 150x150 pixel boundary around the current cursor position, restricting mouse movement to that tiny area. The victim can move their mouse but cannot escape the invisible walls -- just like a mime trapped in an invisible box.

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Added: Feb 27, 2026   |   Last Updated: