Camera Tests — Webcam, Video & Call Setup
By Jayadeep · Last updated: August 2026 · How we test
Check your camera works, looks right and is the device your call app will actually use — before the call starts, not during it.
There is a narrow window in which a webcam problem is cheap to fix, and it closes the moment a meeting starts. Once you are in the call, you are debugging in front of an audience, with limited access to settings and no way to see what has gone wrong from the other side. Checking beforehand takes under a minute and removes the entire category of problem, which is why this test exists as a separate destination rather than as a step inside something else.
The most common webcam fault is not a broken camera. It is the wrong camera. Laptops with an external monitor frequently have two, docking stations sometimes present a third, and virtual cameras installed by streaming or effects software insert themselves into the list and often win the default. The result is a black rectangle or an unexpected view, produced by a system where every individual component is working correctly. Seeing the live preview and being able to switch devices resolves this in seconds, and tells you the exact device name to select inside your call app.
The second most common is permission. Browsers and operating systems both gate camera access, and they gate it separately — so a camera can be allowed at the operating system level and blocked for a specific browser, or allowed for the browser and blocked for a specific site. A camera that produces no image and no error is usually a permission that was denied once and remembered. Recent macOS releases in particular tightened per-application camera and microphone permissions, and applications that worked before an update can silently stop.
Because a video call uses the camera and the microphone together, this test shows a live microphone level alongside the preview. Checking them separately is how people end up fixing the camera and then discovering the mic was the actual problem. Everything here runs through the browser's MediaDevices interface: the video stream is rendered directly in the page, never encoded, never written to disk and never transmitted. Nothing is recorded, and closing the tab ends the stream entirely.
Every camera test
Which test do I need?
Nearly every webcam problem is the wrong device or a denied permission rather than a broken camera. Start with the live preview and switch devices before assuming a fault.
| What you are seeing | Start here | Why this one |
|---|
| I have a call in five minutes | Webcam Test | Opens a live preview with a microphone level meter, so you can confirm picture and sound together before you join. |
| My camera shows a black screen | Webcam Test | Almost always the wrong device or a denied permission rather than a fault. Switch devices in the test and see whether another one produces a picture. |
| The camera works elsewhere but not in Teams or Zoom | Webcam Test | If the preview works here, the hardware and driver are fine and the problem is a per-app device selection or permission. Note the exact device name and select it in the app. |
| I want to check my mic at the same time | Microphone Test | For a deeper microphone check — level meter, waveform, and record-and-playback so you can hear how you actually sound. |
Troubleshooting guides
Platform-specific walkthroughs for Windows and macOS, plus the app-level fixes for Teams, Zoom and Meet.
Frequently Asked Questions
Is my camera feed recorded or uploaded anywhere?
No. The video stream is rendered directly in the page and is never encoded, saved or transmitted. There is no server component to receive it. Closing the tab ends the stream immediately, and you can verify all of this by watching your browser's network panel while the test runs.
Why is my webcam showing a black screen?
Usually the browser is using a different camera than you expect, or another application is already holding the camera exclusively. Close other video apps, then use the device switcher to cycle through the available cameras. A physical privacy shutter is worth ruling out too — it is a common and slightly embarrassing cause.
My webcam works here but not in Zoom or Teams. What now?
That is a useful result: it proves the camera, driver and permissions are working at the system level, so the fault is inside the app. Check that app's video settings for the selected device, and check its permission entry in your operating system's privacy settings. Applications keep their own device selection independently of the system default.
Why does the browser ask for permission every time?
It should not, unless you are declining to remember the choice or your browser is set to clear site permissions on exit. Private or incognito windows also discard permissions when closed. Granting permission and choosing to remember it stops the repeated prompt for that site.
Can I test my camera without a working microphone?
Yes. The camera and microphone are requested separately, so a missing or blocked microphone does not prevent the video preview from working. You will simply see no movement on the audio level meter.
Other test categories
Audio tests · Screen tests · Controller tests · Input tests · Performance tests
Your camera feed is rendered directly in the page and never encoded, saved or transmitted. Closing the tab ends the stream immediately. How we validate these tests.