Test it
Open the Webcam Test and allow camera access when the browser asks. You should see yourself, with the camera's real resolution and frame rate. If you have more than one camera, switch between them there.
If the picture is black
- A privacy shutter or switch. Many laptops have a sliding cover over the lens, or a camera key (often F8 or F10) that turns it off.
- Another app has it. Only one program can use most webcams at a time. Close Zoom, Teams, Skype or the camera app and reload the page.
- Blocked in the browser. Click the camera or lock icon in the address bar and allow the camera for the site.
- Blocked by the system. On Windows, Settings → Privacy & security → Camera; on a Mac, System Settings → Privacy & Security → Camera. Turn access on for your browser.
If no camera is found
For a USB webcam, try another port and avoid unpowered hubs. On Windows, look for the camera in Device Manager under Cameras or Imaging devices; if it has a warning sign, reinstall the driver. On a laptop, check the maker's support page for a camera driver or BIOS update.
If the picture is poor
Low light causes most grainy video: face a window or a lamp rather than sitting with the light behind you. Wipe the lens, and pick the highest resolution your video app offers. A frame rate well below 30 fps usually means too little light or a busy USB port.
Before a call, check the Microphone Test and Speaker Test too.