How do mouse jigglers work?
A mouse jiggler has one job: convince your computer that a human is present, so it doesn't sleep, dim, or mark you "away." But there are several very different ways to pull that off. Here's what's actually happening under the hood.
Why computers think you've left
Your operating system tracks an idle timer — the time since the last mouse or keyboard input. When it crosses a threshold, Windows dims and sleeps, screensavers kick in, and apps like Teams flip your status to "Away." Every jiggler works by resetting that timer (or, for browser tools, by preventing sleep another way).
Software jigglers: injecting input
A software jiggler is a small program that calls an operating-system function to synthesize input — the same events the OS receives from a real mouse. On Windows this is typically the SendInput or mouse_event API; the app tells Windows "the mouse moved 1 pixel," and the idle timer resets. Because it's real injected input, it reliably keeps your status active.
Good software jigglers — like the free one on our homepage — randomize the timing and distance so the movement looks human rather than a robotic tick every 30 seconds. (More on that in are mouse jigglers detectable?)
Browser tools: preventing sleep without moving the mouse
A website can't inject mouse input (browsers block it for security), so online "keep-awake" tools use different levers: the Wake Lock API to stop the screen sleeping, plus a silent audio loop and Picture-in-Picture to keep the browser tab alive in the background. They keep your display on, but they don't reset the OS input-idle timer the way real movement does.
Hardware jigglers: two flavors
- USB dongles emulate a real USB mouse (a HID device). The computer sees an ordinary mouse sending tiny movements — there's no software on the PC at all, which is why they're marketed as "undetectable."
- Mechanical movers don't connect to the computer. They're a small motorized pad that physically nudges your real mouse — pure physics, nothing digital to detect.
So which "works" best?
For simply keeping your screen awake, a browser tool is instant and free. For genuinely resetting the idle timer and keeping your status active, you need real movement — a free software jiggler or a hardware device. If your work laptop blocks software, hardware is the way. See our full software vs. hardware comparison.