To test your webcam, open a webcam test, allow camera access, and look at the live picture. If you can see yourself clearly, the camera works. The free webcam test does this in your browser, shows the resolution and frame rate, and never records or uploads anything.
That is the whole job in one line. The rest of this guide covers what to check, and what to do when the picture is black.
Why test before, not during
The worst time to discover a dead camera is thirty seconds into an interview. A quick check beforehand tells you three things that matter on a call: the camera is detected, the right one is selected, and the picture looks the way you want. Plenty of laptops have both a built-in camera and an external one, and meetings often default to the wrong one.
A test also lets you fix framing and light while no one is watching. Raise the laptop, face a window rather than sitting with it behind you, and you look noticeably better before you have spoken a word.
How to test your webcam
Step 1: Allow access
Open the webcam test and press start. Your browser asks for permission to use the camera. Accept it, and your live picture appears straight away. The permission covers this page only; nothing runs in the background after you leave.
Step 2: Check the picture and the numbers
Look for a clear, well-lit image. Below it you can read the resolution and frame rate the camera is actually sending, which is useful when you want to confirm a webcam is running at the quality you paid for. If you have more than one camera, switch between them to find the right one.
Step 3: Grab a snapshot
Take a still if you want to inspect focus and colour closely, or just to confirm everything works. The snapshot stays on your device for you to keep or discard.
Fixing a black screen
A black preview is the most common complaint, and it is rarely the camera itself. Work through these in order:
- Another app has the camera. Only one app can usually use a webcam at a time. Quit Zoom, Teams, Meet, FaceTime or Photo Booth, then reload.
- Permission was blocked. Check the small camera icon in the browser address bar and set it to allow, then reload.
- A privacy cover or switch. Many laptops have a physical shutter or a function key that disables the camera. Slide the cover open or toggle the key.
- The wrong camera is selected. Use the camera picker to switch inputs; a virtual camera from streaming software can sit in front of the real one.
If the picture is still black after all of that, and the camera fails in other apps too, the hardware or its driver is the likely cause.
What the test does not do
A browser test shows you the camera works and at what resolution. It cannot judge image quality the way your eye can, so still trust your own look at the picture for focus, colour and noise. It also will not fix a driver problem; for that, a restart and a driver update from the maker are the usual next steps.
Once the camera checks out, it is worth running a quick microphone test and speaker test too, since a call needs all three working together.