Use this webcam test to check whether your camera is working before a video call, class or interview. Start the test to view your camera feed and check its active resolution, frame rate and camera settings.
Start the test, allow camera access in your browser prompt, and check the live preview, active resolution, frame rate and camera details below.
A continuous live preview confirms that your operating system and web browser are receiving video frames from your camera. The status panel displays the actual delivered resolution (width × height), standard resolution class (such as 1080p Full HD or 720p HD), aspect ratio, estimated frame megapixels, and both the stream target frame rate and live measured preview FPS. If multiple cameras are attached, you can switch between them seamlessly.
Webcam video dimensions are defined by horizontal and vertical pixel counts. Standard high-definition (720p HD) delivers 1280 × 720 pixels, Full HD (1080p) delivers 1920 × 1080 pixels, and 4K UHD provides 3840 × 2160 pixels. Most modern video conferencing platforms and webcams utilize a 16:9 widescreen aspect ratio, though older models or tablet sensors may use 4:3 (such as 640 × 480 VGA or 1280 × 960). Our tester inspects the exact video dimensions delivered to the browser and calculates the active aspect ratio and frame megapixels in real time.
Webcams generally target 30 frames per second (FPS) or 60 FPS for smooth, natural motion. However, there is a key distinction between the stream's theoretical target setting and the actual frame rate received by the browser. When lighting is insufficient, webcam firmware automatically lowers the shutter speed to allow more light onto the sensor, causing the actual frame rate to drop to 15–20 FPS. Our tester displays both the driver-negotiated target frame rate and the real-time measured preview frame rate using high-precision browser timestamps.
When you look into a webcam, humans naturally expect a mirrored reflection (like looking into a bathroom mirror). Moving your right hand should appear on the right side of the screen. By default, our preview enables mirror mode for intuitive framing and selfie alignment. However, in video calls or when holding text up to the camera, other participants actually see the unmirrored, natural perspective. You can toggle Mirror Mode off at any time to verify how text or logos will appear to colleagues on the other end of a call.
On Windows and macOS, standard webcam drivers operate under exclusive hardware access models. This means only one software application can connect to the camera sensor at a time. If an application like Zoom, Microsoft Teams, OBS Studio, or Skype is already running in the background—even minimized—the camera will fail to initialize in your browser with a TrackStartError or NotReadableError. Completely quitting competing video apps frees the USB camera pipe immediately.
Image quality depends far more on ambient lighting than on camera resolution. Even an expensive 4K webcam will look grainy, dark, and noisy in a dimly lit room because the tiny camera sensor must amplify digital gain. Place a soft, diffused light source directly in front of your face (or sit facing a window) and avoid having bright backlighting or windows directly behind you. Additionally, raising your laptop so the camera lens is level with your eye line creates a much more flattering, professional camera angle.
Browser media APIs receive a decoded, post-processed video stream from your operating system's media layer. Web browsers cannot measure physical camera sensor dimensions, optical lens aperture (f-stop), optical distortion, or native sensor megapixels. While our tool accurately calculates frame megapixels from the active video dimensions (such as 2.07 MP for a 1080p frame), this reflects the delivered digital stream rather than the camera's raw hardware sensor ceiling.
Browser video settings describe the stream delivered by your operating system and camera driver. They do not measure physical lens MTF optical sharpness, dynamic range, color accuracy, or true sensor silicon megapixels.
Click 'Start Webcam Test' on this page and grant camera permission in your browser prompt. If your camera is working, your live video feed will appear immediately along with active stream resolution and frame rate.
A clear, real-time video feed in the preview box confirms that your operating system and browser are successfully receiving frames from the camera. The status indicators will also show your active resolution and frame rate.
If the preview remains blank or shows an error, check whether your browser blocked camera access (look for a camera or lock icon in the address bar), confirm your webcam is securely plugged in, and verify that physical privacy shutters or function keys are open.
In Chrome, Edge, or Firefox, click the site settings or lock icon next to the URL in the address bar, find Camera, set it to 'Allow', and click 'Try Again' or refresh the page.
Yes. Once camera permission is granted, all connected cameras appear in the camera dropdown. Selecting a different webcam seamlessly switches the preview without reloading the page.
Our tester reads active stream settings directly from your camera track, displaying actual pixel dimensions (such as 1920 × 1080 for 1080p Full HD) and tracking live measured FPS alongside the stream's target frame rate.
A black screen is frequently caused by a physical lens privacy cover, an app shortcut switch, or another background application holding exclusive access. A dark or grainy image usually indicates low room lighting, which forces the camera to increase digital gain.
No. Video frames and snapshots are processed strictly in your local browser memory using the HTML5 MediaDevices and Canvas APIs. No camera feeds or images are ever transmitted to or stored on our servers.
Webcams often advertise maximum still photo resolution or optimal 4K/1080p modes that require specific USB 3.0 ports, dedicated software drivers, or favorable lighting conditions. When connected over USB 2.0 hubs, under heavy CPU load, or in default browser WebRTC contexts, operating systems often negotiate a 720p or 1080p stream to guarantee reliable, low-latency video streaming.