Display Check
What your browser can tell about this screen, measured live, plus three visual tests. Nothing is sent anywhere; every number below is read from your own device and shown to you only.
ON-DEVICE · NO NETWORK REQUESTSREFRESH RATE measuring…
Measured by timing animation frames for two seconds and taking the median interval. Keep this tab in front; browsers throttle background tabs. Laptops on battery and variable-refresh panels can report less than the panel's maximum.
THIS SCREEN
COLOR & CAPABILITIES
GRAPHICS
Read from WebGL and WebGPU. Some browsers deliberately hide the exact GPU model to limit fingerprinting, in which case you'll see a generic name.
VISUAL TESTS
Fills the whole screen with solid colors. Tap, click or press any key to cycle white, black, red, green, blue and grey. Look for dots that stay the wrong color. Esc to leave.
Bars move at 1, 2 and 4 pixels per frame with a live frame counter. Smooth movement means every frame is being drawn; stutter or doubled bars means dropped frames.
Full-screen gradients and a mid-grey field. Visible stripes in the gradient mean limited bit depth; blotches in the grey mean uneven backlight.
Quick preview above; use START for full screen. Fullscreen needs a tap on phones and may not be offered on iPhone, where the test runs in the page instead.