// hardware diagnostics in your browser
Test your mic, camera, keyboard and mouse online
10 free tests that run locally. Check a device before a call, a stream or a match. Nothing is uploaded.
Your device
live- OS
- Browser
- GPU
- CPU
- Memory
- Screen (CSS px)
Before a video call
Check your mic, camera and sound in under a minute.
Gaming & hardware
Click speed, polling rate, dead keys, double-click faults and dead pixels.
Keyboard test
Press every key and see which ones work, stick or ghost.
Mouse test
Check every button, the scroll wheel and double-click faults.
CPS test
How many clicks per second can you do? 1, 5, 10, 30 or 60 seconds.
Double click test
Find out if your mouse registers one click as two.
Scroll test
Check your scroll wheel for skipping and wrong-direction jumps.
Polling rate test
Measure your mouse's polling rate in Hz.
Dead pixel test
Fill your screen with solid colors to find dead and stuck pixels.
Before your next video call
Most call problems come down to three things: the wrong microphone selected, a camera another app is holding, or sound going to the wrong speakers. Run the mic test, the camera testand the sound test before you join.
For gamers
Check every button with the mouse test, catch a worn switch with thedouble click test, measure your polling rate, and see how fast you click with the CPS test. The keyboard test shows dead keys and rollover; the dead pixel test checks a new monitor.
Private by design
Every test uses your browser’s built-in access to the device. Your voice, picture and input are processed on your own computer or phone and are never sent to us or anyone else. The device panel above reads only what your browser exposes, and it stays on this page.
FAQ
Are these device tests free?
Yes. Every test is free, with no sign-up and nothing to install. The site is supported by ads, which never appear inside a test.
Is it safe to allow microphone and camera access?
Yes. The tests run entirely in your browser. Audio and video never leave your device: nothing is uploaded, recorded or stored on a server. Access ends when you close the tab.
Which browsers and devices work?
Current Chrome, Edge, Firefox and Safari on Windows, Mac, Linux, ChromeOS, iPhone, iPad and Android. Keyboard and mouse tests need a physical keyboard and mouse; the CPS test also works with touch.