Phone tools
Browser-based phone tests
Check common phone behaviors locally in your browser. Nothing is recorded, uploaded or stored.
Dead Pixel Test
Cycle through solid colors, gray steps and a gradient to inspect a display.
Touch Screen Test
Draw across a touch grid to check coverage and simultaneous touch input.
Refresh Rate Test
Measure frame intervals delivered by your browser for a short sample.
Speaker Test
Play low-volume left, right and center tones, a sweep and volume steps.
Microphone Test
Show a live input-level meter after you grant microphone permission.
Camera Test
Preview the front or back camera and report the active stream resolution.
Buying a used phone?
Use these checks alongside the phone's real specifications and physical inspection.
Open used phone checklist →