Android Diagnostics Tools
Check that your phone's hardware actually works. Test the screen, sensors, GPS, speakers, vibration, camera and refresh rate, all in your browser with nothing to install.
- Free
- Works offline
- No sign-up
- Private by default
All Diagnostics tools
Check hardware, sensors, screens, speakers, cameras, and device behavior.
Screen Tester
Test your display for dead pixels and check that touch responds everywhere.
Touch Test
Map multitouch points and drag to find dead zones or ghost touches.
Sensor Viewer
Read your accelerometer, gyroscope, magnetometer and more, live.
GPS Tester
Check your GPS fix, coordinates and reported accuracy in real time.
Speaker & Mic
Test each speaker channel and confirm your microphone is picking up sound.
Vibration
Fire the vibration motor with different patterns to confirm it works.
Camera & Flash
Preview your front and rear cameras and toggle the flashlight.
Refresh Rate
Measure your screen's real refresh rate in frames per second.
IMEI Checker
Validate a 15-digit IMEI with Luhn and decode its TAC to a device.
Secret Codes
Browse USSD and dialer codes by brand, each tagged for risk.
Run a full hardware check on your phone
Before you buy a used phone, return a new one, or chase down a fault, you want to know exactly what works. These diagnostics tools let you exercise each piece of hardware on its own: light up every pixel to spot a dead one, watch the accelerometer react as you tilt the device, confirm your GPS gets a fix, and play tones through each speaker. Everything runs locally in your browser, so nothing you test is uploaded anywhere.
Because the site is a Progressive Web App, you can install it and keep these checks on hand even without a connection. Pair them with the IMEI checker to confirm a device's identity and the secret codes database to reach hidden service menus, and you have a quick, private way to vet any Android phone end to end.