How to use the Webcam Test
- Click Allow camera and start, then choose Allow in the browser prompt.
- Pick the camera to test; on phones you can switch between front and back.
- Choose a requested resolution and check the actual resolution, frame rate and brightness hint; mirror the view if you like.
- Click Snapshot to save a local test photo, then press Stop to release the camera.
Why a webcam will not start
1) Camera permission is blocked by the browser or OS (Windows Privacy & security → Camera, macOS Privacy & Security → Camera). 2) Another meeting app or tab is using it. 3) A laptop privacy shutter or function key has disabled it. 4) An external webcam lacks USB power. The tool explains the fix for each error type.
Resolution and frame rate
You choose a requested resolution; the browser negotiates the closest mode the device supports and shows it as actual. Many built-in cameras run only 15–30 fps at 1080p and lower the frame rate further in dim light. Meeting apps usually use 720p.
Dark or blurry picture
The tool measures average brightness. If it is too dark, add light in front of you and avoid sitting with a window behind you. If it is blurry, clean the lens and check autofocus support; snapshots help you compare changes.
Frequently asked questions
Is my camera feed uploaded or recorded?
No. The picture is shown and analysed for brightness only in your browser. Snapshots stay local and are only saved to your computer when you click Download.
Why does it say the device is busy?
A camera can usually be used by one app at a time. Close Zoom, Teams, Google Meet or other tabs using the camera and try again.
How do I switch front and back cameras on a phone?
After granting permission, tap Switch front/back camera. Some browsers need you to stop and start again for the switch to take effect.
Why is the actual resolution lower than requested?
If the camera or browser does not support the mode, it falls back automatically. USB 2.0 ports and low light can also limit resolution and frame rate.
How do I turn the camera off?
Press Stop to release it and the indicator light turns off. Closing the page releases it too.