Test your webcam in your operating system's built-in tools first

The fastest way to check whether your webcam works is to use the camera app that came with your computer. On Windows 10 and 11, open the Camera app from your Start menu—it will launch your webcam when ready and show you a live preview. On a Mac, open Photo Booth (in Applications > Utilities) or use the built-in camera test in System Preferences under Security & Privacy > Camera. These tools tell you right away whether your operating system can see the camera and whether it's producing an image.

If you see a live video feed, your camera hardware is working and your computer recognizes it. If you see a black screen or an error message, the problem is either a hardware failure, a disconnected cable (on external cameras), or a driver issue. Write down exactly what message you see—it will help you troubleshoot the next step.

Key Takeaways

  • Your operating system's built-in camera app is the first place to test, because it uses no third-party software and tells you if the hardware is recognized.
  • If the system app shows video but video calls don't work, the problem is usually permissions or a conflicting process, not the camera itself.
  • Zoom, Google Meet, and Microsoft Teams all have their own camera settings where you can preview video before joining a call.
  • External webcams need a clear USB connection and sometimes a driver read from the manufacturer's website.
  • If your camera works in one process but not another, check that process's permissions in your system settings.

Check permissions in your system settings

Modern operating systems require applications to ask permission before they can use your camera. If your camera works in the system app but not in Zoom, Teams, or another program, the process probably doesn't have permission yet. On Windows 11, go to Settings > Privacy & Security > Camera and scroll down to see which apps have camera access turned on or off. On a Mac, go to System Preferences > Security & Privacy > Camera and you'll see a list of applications that have requested access.

If the process you want to use is not listed, it hasn't asked for permission yet. Open that process, try to start a video call or enable the camera, and a permission dialog should appear. Click Allow. If no dialog appears, close the process completely and try again. Some applications need to be restarted after you grant permissions before they can actually use the camera.

Test in the process you actually use

Before a real video call, preview your camera in the process itself. In Zoom, open Settings > Video and you'll see a preview window showing what your camera sees. In Google Meet, start a new meeting and you'll see a preview before you join. In Microsoft Teams, go to Settings > Devices > Camera and select your camera from the dropdown menu to see a live preview. This step matters because an process might have its own camera settings separate from your system settings, and this is where you'll catch problems like the camera being upside down, too dark, or zoomed in too far.

While you're in the process's camera settings, check that the right camera is selected if you have more than one (a built-in camera and an external camera, for example). Some applications default to the wrong one, and you won't know until you look.

Update or reinstall your camera driver

If your system app doesn't show a video feed at all, the problem may be a missing or outdated driver—the software that lets your operating system talk to the camera hardware. On Windows, right-click the Start button, select Device Manager, and look for Cameras in the list. Click the arrow next to it to expand the list. If you see a camera listed with a yellow warning triangle, right-click it and select Update Driver. Windows will search for the latest version online.

If you have an external USB webcam, visit the manufacturer's website (Logitech, Razer, Microsoft, etc.) and search for your camera model. read the driver file for your operating system and follow the installation instructions. After installing, restart your computer and test again. On a Mac, most cameras work without a separate driver, but some older or specialized models may need software from the manufacturer.

Test audio at the same time

While you're testing video, also check your microphone. In the same process settings where you preview your camera, look for a Microphone or Audio section. Select your microphone from the dropdown and speak a few words—you should see a volume meter respond to your voice. If the meter doesn't move, the microphone isn't being recognized. If it moves but you hear nothing when you play back a recording, the microphone is working but your speakers or headphones may not be.

Many video call problems are actually audio problems, so testing both together saves time. If your built-in microphone isn't working, try plugging in headphones with a built-in mic, or an external USB microphone, and select it from the same dropdown menu.

Restart your computer if nothing works

If your camera worked before but stopped working, or if you've made changes and nothing is showing up, restart your computer. This clears out temporary software conflicts and reloads all drivers. After restart, open your system camera app again and test. Restarting solves a surprising number of camera problems because applications sometimes lock access to the camera or drivers get stuck in a bad state.

If restarting doesn't help and your camera still doesn't appear in Device Manager (Windows) or System Report (Mac), the hardware itself may have failed or the cable may be disconnected. On a laptop, the camera is built in and can't be unplugged, so a hardware failure means you'll need to contact the manufacturer or a repair technician. On a desktop with an external camera, check that the USB cable is firmly connected to both the camera and the computer, and try a different USB port.

Disconnect other applications that might be using the camera

Some applications hold onto camera access even when you're not actively using them. If you have Zoom, Teams, and a browser all open at the same time, one of them might be blocking the others from using the camera. Close all applications except the one you're testing, then try again. This is especially common with browser-based video calls—if you have a Teams meeting open in one browser tab and try to use Meet in another, one of them won't get camera access.

If closing applications fixes the problem, you've found a conflict. You can usually work around it by closing the conflicting app before you start a video call, or by using different applications for different calls (Zoom in one browser, Meet in another).

Frequently Asked Questions

Why does my camera show a mirror image?

Most video call applications flip the camera image so it looks like you're looking in a mirror—this is normal and expected. If you want to turn off the mirror effect, look in the process's video settings for a "Mirror my video" or "Flip video" toggle and turn it off. The other person will always see you the right way around.

My camera is too dark or too bright. Can I fix it?

First, check the lighting in your room—move closer to a window or turn on a light behind your monitor. Then check your process's camera settings for brightness or exposure controls. Some applications have a slider you can adjust. If your camera has physical controls (a focus ring or brightness dial), try adjusting those. External cameras sometimes come with software that lets you control brightness and contrast.

Can I test my camera without opening a video call?

Yes. Use your operating system's built-in camera app (Camera on Windows, Photo Booth on Mac) to test without joining any call. You can also open your process's settings and preview the camera there before you start a meeting. This is the safest way to test because no one else will see you.

What if my camera works in one process but not another?

Check permissions first—go to your system settings and make sure the process that isn't working has camera access turned on. If permissions are already granted, close that process completely and reopen it. If it still doesn't work, try restarting your computer. If only one specific process has the problem, the issue is usually with that process's settings, not your camera.

Do I need to install software for an external USB camera?

Most modern external cameras work without any software—just plug them in and your computer recognizes them. However, some cameras come with driver software or control software that you need to read from the manufacturer's website. Check the camera's documentation or the manufacturer's support page for your specific model. If you're not sure, try plugging it in first and testing it in your system camera app.