Cover-the-Top Test
Simply cover the top of your phone with your hand. The test mirrors exactly what happens when you hold the phone to your ear during a call.
Proximity Sensor Test
Cover the Top of Your Phone
Check whether your phone's proximity sensor is working. Simply cover the top of your device with your hand — this is the same sensor that dims your screen during calls. Works in any browser, no app needed.
Sensor inactive
Proximity
Far
Far
Near
How to Test
1
Tap "Start Proximity Test" and allow the browser prompt.
2
Cover the top of your phone — near the earpiece or front camera — with your hand.
3
The test should switch to "Near" and the phone screen illustration should dim, just like during a call.
4
Remove your hand and confirm the sensor returns to "Far" and the screen brightens again.
Features
What This Proximity Sensor Test Does
A simple, interactive check that mirrors how your phone uses the sensor during calls.
Screen Dim Simulation
A phone illustration dims its screen when the sensor detects an object, just like the real behavior during a phone call.
Live Proximity Meter
A clear meter shows the current proximity state — Far or Near — so you can see the sensor respond in real time as you move your hand.
Availability Check
The sidebar shows whether the Proximity Sensor API is supported and what the current sensor state is, so you know if your browser exposes it.
Phone-Optimized
Built mobile-first with a phone illustration that makes the sensor location obvious. Works on any Android device with Chrome or another Chromium browser.
100% Private
Everything runs locally in your browser. No data is transmitted, stored, or shared — just a simple, private sensor check.
How It Works
Test Your Proximity Sensor in 4 Steps
No app, no sign-up — just a simple, accurate check.
Enable Sensor
Tap "Start Proximity Test" and allow the browser prompt to access the sensor.
Cover the Top
Place your hand over the top edge of your phone, near the earpiece or front camera.
Watch the Response
The status should switch to "Near", the meter should fill, and the phone screen should dim.
Remove Your Hand
The sensor should return to "Far" and the screen should brighten again — confirming it works.
FAQ
Proximity Sensor Test — Common Questions
Everything you need to know about testing your phone's proximity sensor.
Open this page on your phone, tap "Start Proximity Test", and allow sensor access when prompted. Then simply cover the top of your phone (near the earpiece or front camera) with your hand. The screen should change to indicate the sensor has detected an object. When you remove your hand, the sensor should return to the "far" state.
During a call, the proximity sensor detects when the phone is held against your ear. When it senses an object (your head), it turns off the touchscreen and dims the display to prevent accidental taps and save battery. When you move the phone away, the screen turns back on.
A non-working proximity sensor can be caused by a dirty screen protector covering the sensor, a hardware failure, or a software glitch. Try cleaning the top of the screen, removing any screen protector or case that covers the sensor, restarting your phone, and running this test again. If the sensor still doesn't respond, it may need a repair.
The Proximity Sensor API is currently supported on Chrome for Android and other Chromium-based mobile browsers. Safari on iOS does not expose the proximity sensor to web apps, so the test will show as "unsupported" on iPhones. Desktop browsers also do not have a proximity sensor.