The camera and microphone start only after you press a button and approve the browser prompt.
Private device checks
Make sure everything works,
before the call starts.
Test your camera, microphone, speakers, keyboard, and display from one page. Permission is requested only when a test needs it.
DEVICE CHECK
Device Test Toolkit
Camera and microphone data stay in this browser
01Not started
Webcam Test
Preview the selected camera and inspect its actual stream settings.
CAMYour preview will appear here
Resolution—
Frame rate—
Facing mode—
ConnectionWaiting
02Not started
Microphone Test
Watch the input level and record a short sample for playback.
Input level0%
03No permission needed
Speaker Test
Play a short, quiet tone through the left, right, or both channels.
04
Keyboard Test
Press keys to highlight them. Browser-reserved shortcuts may not appear.
—0 keys tested
05No permission needed
Screen & Dead Pixel Test
Open full-screen colors and gradients to spot stuck pixels or uneven display areas.
Live previews, waveform data, and test recordings stay on this device.
Device streams are closed when you stop a test or leave the page.
Check your devices before a call
Preview a webcam, inspect its active resolution and frame rate, check microphone input levels, record a short sample, and play left or right speaker tones from one page.
Keyboard presses are highlighted on a visual layout, while full-screen solid colors make stuck or dead pixels easier to spot. Camera and microphone streams start only after permission and stop when you leave.