The short answer
Open the webcam test below and press Start webcam test. If the browser shows an error that access was blocked, allow the camera for the site and in your system privacy settings. If it says the device is in use, close Zoom, Teams, Skype, OBS or the Camera app. If the picture is black while everything is allowed, look for a physical shutter on the camera or a camera key on the laptop keyboard. If no device is found at all, the driver or the connection is the problem.
When the picture appears, the camera itself works. Any problem left is a setting inside the app you want to use it in.
Try it here: Webcam Test
Open the full tool pageAllow the camera in the browser and the system
Like a microphone, a camera needs two permissions: one for the website and one for the browser in the operating system. A block at either level gives a black picture or an error.
- Chrome and Edge: click the icon left of the address and set Camera to Allow, then reload. Chrome lists all sites under Settings > Privacy and security > Site settings > Camera.
- Firefox: click the permissions icon in the address bar, remove the blocked camera entry and reload.
- Safari on Mac: Safari > Settings > Websites > Camera, set the site to Allow or Ask.
- Windows 11: Settings > Privacy & security > Camera. Turn on Camera access, Let apps access your camera and Let desktop apps access your camera. On Windows 10 it is Settings > Privacy > Camera.
- macOS: System Settings > Privacy & Security > Camera, switch on the browser, then quit and reopen it.
- iPhone and Android: allow the camera for the browser app in the phone settings and for the site in the browser.
Another app is using the camera
On Windows, a webcam is usually available to one app at a time. A video call left open in the background, a meeting app that starts with Windows, OBS, a second browser tab or a vendor camera utility can all hold it. Close them completely, including from the system tray, and try again. On a Mac several apps can often share the camera, but a stuck process can still block it; restarting the computer clears this.
The test on this page releases the camera when you press Stop, switch to another tab or leave the page, so it will not block your call afterwards.
Black picture, shutter and camera keys
- Many laptops and webcams have a sliding privacy shutter over the lens. It can be very small and easy to miss.
- Some laptops turn the camera off with a function key that shows a camera icon. Press it, sometimes together with the Fn key, and watch for an on screen message.
- Some manufacturer apps (Lenovo Vantage, HP, Dell and others) have their own camera privacy switch. Check it if the camera stays black.
- Antivirus and company security software can block camera access for all apps. Look for a webcam protection setting.
- A camera light that turns on while the picture stays black points to a driver or app problem rather than a block.
Drivers and connection
On Windows, open Device Manager and look under Cameras or Imaging devices. If the camera has a warning sign, right click it, choose Uninstall device, then Action > Scan for hardware changes to reinstall it. If it is missing completely, the laptop may have it disabled in the BIOS settings, or a USB webcam may not be getting enough power or bandwidth.
Plug a USB webcam directly into the computer instead of a hub or a monitor port, and try another port. A 1080p webcam on a busy USB hub can fail to start or drop to a low resolution. On a Mac there are no webcam drivers to install for standard USB cameras; if one is not detected, try another cable and port.
Low quality, low light and real resolution
A webcam sold as Full HD may only deliver 720p to the browser, and many cameras drop to 15 frames per second in a dim room because they need a longer exposure for each frame. The test shows the resolution the camera actually sends, its aspect ratio, and the frames per second that really arrive. Use the Resolution list to ask for 720p (HD), 1080p (Full HD) or 2160p (4K); if the camera cannot do it, it sends the closest size it supports.
Add light from the front, such as a lamp behind the screen or a window facing you, and the frame rate usually goes back up to 30. Light from behind makes your face dark because the camera exposes for the bright background.
| What the test shows | Likely cause | Fix |
|---|---|---|
| 15 fps or lower | Dim room, long exposure | Add light from the front |
| 640x480 although HD was requested | Camera limit or busy USB port | Use a direct USB port, request 720p again |
| Picture stutters, fps jumps | USB hub, CPU load or bandwidth | Close other apps, change the port |
| Picture mirrored | Mirror view is on | Turn off Mirror view to see what others see |
| Black picture, no error | Shutter, camera key or privacy app | Open the shutter, press the camera key |
Works in the test but not in Zoom, Teams or Meet
Each call app has its own camera selection. Open its video settings and choose the same camera that works in the test. Virtual cameras from OBS, Snap Camera or similar tools often appear first in the list and show nothing when their app is closed. If the app is a desktop program rather than a web page, it also needs the Let desktop apps access your camera switch on Windows or the camera permission on macOS.