About the Webcam Test
What is a webcam test?
A webcam test, or camera test, checks that your camera turns on and sends a clear, steady picture. Web pages reach the camera through the Media Capture and Streams API, a W3C specification. The same API reports the picture size and frame rate the camera is using.
Our tester shows a live preview, counts the frames that actually arrive each second and warns when the picture is too dark, washed out or backlit. You can take a photo or record a short clip, and the What your browser reports panel lists the camera's settings and limits.
How do you test your webcam?
Allow the camera, then check the preview and the readings under it.
- Start the test. Press the Start webcam test button, then allow the camera when your browser asks. In Chrome, choose Allow while visiting the site or Allow this time.
- Check the camera's name. The Camera list shows the camera in use. If it's the wrong one, pick another from the list. On a phone, the front and back cameras both appear there.
- Look at the picture. Your face should be sharp and evenly lit, and the preview should keep up when you wave a hand.
- Read the numbers. Resolution shows the picture size the page receives, and Frame rate shows how many frames reach the page each second.
- Take a photo or record a clip. Press the Take photo button to check a still frame, or the Record a clip button to play back a few seconds of video.
How do you test a camera on Windows or a Mac?
Both systems have built-in apps that turn the camera on.
- Windows. Open the Camera app from the Start menu and check the preview. On Windows 11, you can also go to Settings, then Bluetooth & devices, then Cameras, and select a camera to see a preview with brightness and contrast controls, if the camera supports them.
- Mac. Open FaceTime or Photo Booth, and the camera turns on. A green light beside the built-in camera glows while it's on.
How do you read the camera test results?
The readings show what the page actually receives, which isn't always what it asked for.
- Resolution is the picture size in pixels, width by height. The Ask for buttons request 720p, 1080p or 4K, and the browser delivers the closest size it can, sometimes by cropping and scaling a larger picture. If the camera falls short, the report panel says what you asked for.
- Frame rate counts the frames that reach the page each second. A reading well below the Frame rate setting in the report panel means frames are being lost, or the camera has slowed down to cope with dim light.
- Brightness is the average light level of the whole picture. It's shown as a percentage, where 0% is black. A warning appears when the picture stays very dark, washed out or backlit for a few seconds.
- Highest resolution and Highest frame rate are the camera's limits. The browser reads them from the camera's capabilities, and some cameras can't reach both at the same time.
Common webcam resolutions with their size in pixels and megapixels
| Name | Size in pixels | Megapixels |
|---|
| VGA | 640 × 480 | 0.3 MP |
| 720p (HD) | 1280 × 720 | 0.9 MP |
| 1080p (Full HD) | 1920 × 1080 | 2.1 MP |
| 4K (Ultra HD) | 3840 × 2160 | 8.3 MP |
When a page doesn't ask for a size, Chrome aims for 640 × 480 at 30 frames per second. That's why this test asks for 1080p unless you pick another size.
Why does your webcam look dark, grainy, choppy or blurry?
Start with the light. Dark, grainy and choppy pictures all improve with more of it.
- Dark. The camera needs light falling on your face. A lamp or window in front of you works better than a ceiling light or a lamp behind you, and a White Screen on a second display makes a soft front light.
- Backlit. A bright window behind you makes the camera expose for the window, so your face turns dark. Turn to face the light, or close the blinds behind you.
- Grainy. In dim light the camera turns up its gain to brighten the picture, which also amplifies noise you see as grain. More light is the fix.
- Choppy. Some webcams lower their frame rate in dim light so that each frame can collect more light. Camera settings often call this low-light compensation, and the Frame rate reading drops when it happens.
- Blurry. Wipe the lens with a soft cloth, since a fingerprint softens the whole picture. A webcam with autofocus can also lose focus when you lean in or hold something up.
Why is your webcam not working?
A browser can't use your camera when access is blocked or the camera is busy, switched off or missing.
- Blocked for this site. In Chrome, select View site information to the left of the web address and allow the camera. In Firefox, select the permissions icon in the address bar and clear the block. In Safari on a Mac, choose Website Settings from the Page menu.
- Blocked by Windows or macOS. On Windows 11, open Settings, then Privacy & security, then Camera, and turn on Camera access and Let desktop apps access your camera. On a Mac, open System Settings, then Privacy & Security, then Camera, and turn on Chrome, Firefox or another browser. Safari isn't listed, since apps that come with the Mac already have access.
- Busy. Another app, often a video call, may be holding the camera. Close it, then press Start webcam test again.
- Switched off. Some laptops have a key or side switch that turns the camera off, or a small shutter that covers the lens. Check for these if no camera is found, the picture stays black or it shows a camera with a line through it.
- No camera found. Plug the webcam in again or try another USB port, then press Start webcam test.
- Working here but not in another app. Close this page first so the camera is free, then check that app's own camera setting.
What can't an online webcam test check?
A web page sees only the video the browser passes on.
- What a call app sends. Apps such as Zoom and Teams compress your video and may send a lower resolution than the preview shows, for example on a slow connection.
- Effects added before the browser. Background blur or auto framing turned on in your system or the camera maker's app can already be in the picture the browser gets, and a web page can't turn them off.
- Your microphone. This test uses only the camera. The Mic Test shows your microphone's level and plays back a short recording of your voice.
Common mistakes
These mistakes make a good webcam look poor or a working one look broken.
- Judging the camera by another app. An app or page that doesn't ask for a size may get 640 × 480, so a sharp 1080p webcam looks soft there. The Resolution reading here shows the size this test receives.
- Testing the wrong camera. A laptop with a webcam plugged in has at least two cameras, and a phone has front and back cameras. Check the name in the Camera list.
- Thinking text is backwards. The preview is mirrored like a bathroom mirror, so a sign you hold up reads backwards. Other people see it the right way around, and turning off Mirror the preview shows it their way.
Common Use Cases
A webcam test helps whenever people will see you on camera.
- Before a call or interview. Check the light and the framing, then take a photo to see how you'll look.
- Choosing where to sit. Try a few spots and watch the Brightness reading and the warnings.
- Checking a new webcam. Compare Highest resolution and Highest frame rate with the numbers on the box.
- Setting up a stream. Record a short clip to check focus and motion before you go live.
Saved a photo? The Image Background Remover cuts you out of the picture without uploading it.
Frequently Asked Questions
Why is my webcam showing a black screen?
Something may be covering the lens, or a key or switch may have turned the camera off. Check for a privacy shutter, and if the picture stays black with the lens open, pick another camera from the Camera list.
Why is my webcam so dark?
There isn't enough light on your face, or a bright window behind you is setting the camera's exposure. Face a lamp or a window, and watch the Brightness reading rise.
Why is my camera lagging?
Dim light or a busy computer can lower the frame rate. If the Frame rate reading stays low after you add light, close other video apps.
Why is my webcam mirrored?
Video apps often flip your own view so it moves like a mirror. Teams says its mirror setting changes only your own view, so other people see you the right way around.
Does the camera test upload your video?
No, the webcam tester never uploads your photos or video. It makes a photo or clip only when you press Take photo or Record a clip, and it stays in the open page until you delete it, make a new one or leave.
How do you check if your PC has a webcam?
Start the test and allow the camera, and the Camera list shows every camera your browser can use. If the test says no camera was found, open Settings, then Bluetooth & devices, then Cameras on Windows 11 to see which cameras Windows detects.
Is my camera on?
Many webcams have a small light that glows while the camera is on, and on a Mac it's green. On a computer, Chrome also shows a camera icon in the address bar while a page is using the camera.
