Device tests tools
Test your screen, mouse, keyboard, microphone, webcam and speakers — in the browser.
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Screen Test ToolFull-screen white, black, grey, red, green and blue to find dead pixels, stuck pixels, backlight bleed, pressure marks and lines — then three questions that say whether it can be fixed. Free, in the browser, nothing installed.What that spot, dot, line or tint on your screen is — and whether it can be fixed
Dead pixel testStep through red, green, blue, black and white full screen to find dead and stuck pixels, then run the pixel fixer over a stuck one. Free, in the browser.Every dead or stuck pixel found — and a fixer for the stuck ones
Touch Screen TestDrag your finger over every square; the ones that stay grey are where the touch screen does not respond. Free, in the browser.Every dead zone on your touch screen, shown
White ScreenThe whole screen white — as a soft light, a mirror, for spotting dark marks and lines, or to clean the screen. One click, full screen.A plain white screen, full screen — for a light, a test or a clean look
Black ScreenThe whole screen black — shows backlight bleed and bright dots, rests an OLED, hides the desktop. One click, full screen.A plain black screen, full screen — for bleed, bright dots, OLED rest or a clean look
Mouse testTest every mouse button and the scroll wheel, catch a mouse that double-clicks on its own, and measure your clicks per second. Free, in the browser, nothing installed.Every button, the wheel, unwanted double clicks and your clicks per second
Keyboard testPress every key and watch it light up on the on-screen keyboard — find dead keys, check key codes and how many keys work at once. Free, in the browser.Every key checked — the ones that don't work show up at once
Microphone testCheck your microphone in seconds: a live level bar, pick between microphones, and record 5 seconds to hear yourself back. Nothing is uploaded. Free, in the browser.Whether your microphone works — live level, and a 5-second recording to hear yourself
Webcam testSee your webcam live with its real resolution, megapixels and frame rate, switch cameras and take a photo. Nothing is uploaded. Free, in the browser.Your camera working, with its real resolution and frame rate
Speaker testPlay a tone on the left, right or both speakers, check the bass, and sweep 20 Hz to 20 kHz to hear what your speakers or headphones can do. Free, in the browser.Left and right channels, bass and a full frequency sweep