Test your camera directly in Zoom's settings before you join a call

Open Zoom and go to Settings (the gear icon in the top right of the main window). Select Video from the left menu. You will see a preview window showing what your camera sees in real time. If you see your face or the room behind you, your camera is working. If the preview is black or shows "No camera detected," your camera is not connected or Zoom cannot find it.

This is the fastest way to check before a meeting starts. You do not need to join a call to run this test — it takes about 30 seconds and tells you whether Zoom can actually use your camera.

Key Takeaways

  • The Video settings panel in Zoom shows a live preview of your camera, so you can see when ready whether it is working.
  • If you see a black screen or "No camera detected," your camera is either unplugged, disabled in Windows or Mac settings, or not recognized by Zoom.
  • You can test different cameras if you have more than one plugged in by clicking the camera dropdown menu in the Video settings.
  • If Zoom cannot see your camera but your computer can, you may need to restart Zoom or give it permission to use the camera in your operating system settings.

What to do if the preview shows a black screen

A black preview usually means one of three things: the camera is unplugged, it is disabled in your operating system, or Zoom does not have permission to use it. Start by checking the physical connection — if you are using an external USB camera, unplug it and plug it back in, then check the Zoom preview again.

If the camera is plugged in and still shows black, check your operating system. On Windows, go to Settings > Privacy & Security > Camera and make sure the toggle is on. On Mac, go to System Settings > Privacy & Security > Camera and check that Zoom is listed and allowed. If Zoom is not listed, restart Zoom and it should prompt you for permission the next time you open the Video settings.

If you have already given Zoom permission and the screen is still black, try closing Zoom completely and opening it again. Sometimes the camera connection does not initialize until Zoom restarts.

How to switch between multiple cameras

If you have more than one camera connected — for example, a built-in laptop camera and an external USB camera — you can test each one in the Video settings. Look for the camera dropdown menu (it usually shows the name of the camera currently selected). Click the dropdown and select a different camera from the list. The preview will switch to show what that camera sees.

This is useful if one camera is not working and you want to use the other one instead. You can also set a default camera here, so Zoom always starts with the one you prefer.

Test your camera during a Zoom meeting if you did not check beforehand

If you join a meeting without testing your camera first, Zoom will ask whether you want to start video. Before you click Start Video, look at the small preview window next to the button — it shows what your camera will broadcast. If the preview is black or blank, do not start video yet. Instead, click the up arrow next to the camera icon and select a different camera, or go back to Settings to troubleshoot.

Once you start video in a meeting, other people can see you, so it is worth checking the preview first. If you are already on video and your camera stops working mid-call, click the camera icon with the slash through it to turn off video, then troubleshoot in Settings before turning it back on.

Check camera permissions in Zoom's own settings

Zoom has its own permission controls separate from your operating system. In the Zoom Video settings, scroll down to find Camera under the permissions section. Make sure it is toggled on. If it is off, turn it on and the preview should appear.

You may also see an option to Mirror my video — this flips the preview horizontally so it looks like a mirror image instead of how others see you. This is a display preference and does not affect what other people see in the meeting.

Restart Zoom and your computer if nothing else works

If you have checked the physical connection, your operating system permissions, and Zoom's settings and the camera still does not work, close Zoom completely and restart your computer. Sometimes a camera driver or software conflict requires a full restart to clear.

After your computer restarts, open Zoom again and go straight to Settings > Video. If the preview still shows nothing, your camera may have a hardware problem or a driver that needs updating. Check the camera manufacturer's website for driver updates, or try the camera in a different process (like your computer's built-in camera app) to confirm whether the camera itself is working.

Frequently Asked Questions

Why does my camera work in other apps but not in Zoom?

Zoom may not have permission to use the camera in your operating system settings, or the Zoom camera setting may be toggled off. Go to your OS privacy settings and make sure Zoom is listed and allowed to access the camera. Then check Zoom's own Video settings to confirm the camera toggle is on.

Can I test my camera without joining a meeting?

Yes. Open Zoom, go to Settings, click Video, and look at the preview window. You will see your camera's live feed without joining any call. This is the best way to test before a meeting starts.

What if I have a built-in camera and an external camera plugged in?

Both will appear in the camera dropdown in Zoom's Video settings. Click the dropdown to switch between them and see which one you want to use. You can set one as your default so Zoom always starts with that camera.

Does testing my camera in Zoom settings use any internet?

No. The preview in Zoom's Video settings is local — it only shows what your camera sees on your computer. It does not send anything over the internet or to Zoom's servers.

Why does my camera preview look upside down or sideways?

Some external cameras have a rotation setting in their own software or driver. Check the camera manufacturer's app or settings. In Zoom, you cannot rotate the preview, but you can use the Mirror my video option to flip it horizontally if that helps.