Touchscreen Dead Zone Tester
Tap and drag across the grid — every cell you touch lights up green. Tap Finish test to reveal the cells that never responded: those are your dead zones. Free, no signup.
Tip: drag your finger slowly over the whole grid, including the edges and corners — dead zones usually hide there. Fullscreen hides the browser bars so you can test the very edges of your screen. Multi-touch is counted live above.
🔒 Private by design: the whole test runs on your device — no touch data ever leaves your phone.
Free touchscreen dead zone tester
Some phones and tablets develop dead zones — areas of the screen that stop responding to touch, often after a drop, a bad screen replacement, or just wear. This tool helps you find them: drag your finger across the grid and every cell you touch lights up green. The cells that stay blank after a full sweep are the areas your screen is missing.
It also counts multi-touch live, so you can check whether your screen still tracks two or more fingers at once.
How to use
- Tap Fullscreen to hide the browser bars and test the very edges of your screen.
- Drag your finger slowly over the whole grid, covering edges and corners.
- Tap Finish test — missed cells turn red and you get a summary of how many dead areas were found.
- Tap Reset test to run it again, for example after rotating your phone.