Device & Browser Tests

Find out what your device and browser can actually do, with quick tests that run entirely in the browser — no app to install and nothing to upload. The input tests check your keyboard, mouse clicks and scroll wheel, mouse DPI, click speed, touch screen, gamepad, and reaction time. The media tests check your webcam, microphone, speakers and headphone frequency response, and a hearing test sweeps through frequencies to show what you can hear. Screen tests look for dead pixels, measure refresh rate, help calibrate color, check for backlight bleed, and measure on-screen distances with a ruler and a PPI calculator. Sensors get their own checks too: battery status, gyroscope and accelerometer, vibration, geolocation, a compass, a bubble level, and even a flashlight that turns your screen white. Browser checks report feature support, WebGL capability, storage quota, and the cookies and local storage this site holds. A few tools are just plain useful in daily life — a Snellen eye chart, a color blindness test, and a full-screen white page for cleaning a display. Whether you are debugging a website, testing a new phone, or checking a feature before you rely on it, these tests give you an answer in seconds.