Webcam Test

This Webcam Test checks your camera directly in your browser — no download, no sign-up, and no upload. It shows a live preview along with your camera's true resolution and the frame rate it is actually delivering, then grades your picture quality and tells you what to fix. Everything runs on your own device: your video is never sent anywhere.

What Is a Webcam Test?

A webcam test confirms that your camera is detected, has permission to run, and produces a usable picture. Most online testers stop there — they show you a mirror and the resolution the browser asked for. That answers "is my camera on?" but not the question people actually have before a job interview or a client call: "do I look good, and if not, why not?"

This tool answers the second question. It measures the frames your camera really delivers, probes which resolutions it truly supports, and analyses your actual pixels to grade brightness, contrast, focus, frame-rate stability and white balance — each with a specific fix.

How This Webcam Test Works

The test uses the browser's standard getUserMedia API to open your camera, draws the feed into a hidden canvas, and reads the pixels back for analysis. Because all of this happens inside the page, your video never travels over the network. When you click Stop Camera or close the tab, the stream ends and your camera's indicator light goes out.

Understanding Your Results

Resolution

The number of pixels in each frame, read straight from the live video track — so it is the size your camera is genuinely producing right now, not a requested value. Higher is not automatically better: a 1080p feed at an unstable 15 fps usually looks worse on a call than a rock-steady 720p feed.

Measured FPS vs Declared FPS

Declared FPS is what your camera claims it can do. Measured FPS is what it is actually handing to the browser, counted frame by frame. The gap between the two is the single most useful number on this page. Webcams quietly halve or quarter their frame rate in dim light, because each frame needs a longer exposure to collect enough light. That is why your video looks smooth by a window at noon and choppy in the same room at night.

Aspect Ratio

The shape of your frame. 16:9 is the standard for video calls and streaming; 4:3 is common on older and budget webcams and appears with black bars on either side in most calling apps.

Common Webcam Resolutions

Note that most calling apps downscale your video anyway — Zoom and Google Meet typically send 720p or less to save bandwidth. Testing at 1080p is still worth doing, because a camera with a larger sensor mode usually produces a cleaner 720p image after downscaling.

What the Camera Health Check Measures

Each check is graded from A to D, and the overall grade is the average of all five — so a single failing area cannot hide behind four good ones.

Common Webcam Problems and How to Fix Them

Webcam Not Working? Troubleshooting by Browser

• Chrome / Edge: click the camera or lock icon in the address bar, set Camera to Allow, and reload. To clear a block: Settings → Privacy and security → Site settings → Camera.
• Firefox: click the lock icon → Connection secure → More information → Permissions, then clear the saved setting for Use the Camera.
• Safari: Safari menu → Settings for This Website → Camera → Allow. On iPhone and iPad, also check Settings → Safari → Camera.
• Windows: Settings → Privacy and security → Camera. Confirm both Camera access and Let desktop apps access your camera are on.
• macOS: System Settings → Privacy and Security → Camera, and tick your browser.
• Still nothing? Check for a physical privacy shutter, try another USB port, and restart your browser to release a stuck camera.

How to Use This Tool

1. Start the camera: Click Start Camera Test and choose Allow when your browser asks for permission.
2. Check the live preview: Confirm you can see yourself. The badges on the video show your true resolution and your measured frame rate.
3. Run the Camera Health Check: Click Run Health Check and hold still for a few seconds to get an A–D grade for brightness, contrast, focus, FPS stability and white balance, each with a fix.
4. Scan supported resolutions: Click Scan Resolutions to find your camera's real maximum, from VGA up to 4K.
5. Take a snapshot: Click Snapshot to freeze a frame and download it as a PNG for a closer look.

Frequently Asked Questions

Is this webcam test safe and private?

Yes. The test runs entirely inside your browser using the standard getUserMedia API. Your video is displayed and analysed on your own device and is never uploaded, recorded on a server, or shared with anyone. Nothing is stored: when you click Stop Camera or close the tab, the stream ends and the camera light goes out.

Why is my measured FPS lower than my camera's rated frame rate?

Most webcams lower their frame rate automatically in dim light, because each frame needs a longer exposure to collect enough light. A 30 fps camera commonly drops to 15 or even 7.5 fps in a poorly lit room, which is why your video looks choppy on calls. Adding light in front of you is usually the fastest fix. A busy CPU, a slow USB hub, or another app sharing the camera can also reduce delivered frames.

Why does my webcam not show 1080p or 4K?

The resolution you get is the resolution the browser negotiated with the camera, not necessarily the maximum the hardware supports. Run the Resolution Scan to see which modes your camera really accepts. If a mode fails, the camera does not support it at all. Some cameras also advertise a high resolution but produce it by upscaling a smaller sensor mode, so the scan verifies that the video track truly reports the size that was requested.

Why is my webcam black or not working?

The most common causes are: another application such as Zoom, Teams or Skype is already holding the camera, so close it and try again; a privacy shutter or sliding cover is closed; camera permission is blocked for this site in your browser settings; or your operating system privacy settings deny camera access to browsers. On Windows check Settings, Privacy and security, Camera. On macOS check System Settings, Privacy and Security, Camera.

What is a good webcam resolution and frame rate for video calls?

For most video calls 1280 × 720 at a steady 30 fps looks better than 1920 × 1080 at an unstable 15 fps, because motion smoothness matters more than pixel count on a small call window. Choose 1080p when you record, stream, or appear on a large screen and you have good lighting. A stable frame rate and even lighting improve perceived quality far more than resolution alone.

What does the Camera Health Check actually measure?

It samples real pixels from your video feed for a few seconds and computes five things: average brightness, contrast measured as the spread of pixel values, sharpness measured with a Laplacian focus score that detects blur, frame-rate stability comparing delivered frames against the rate your camera advertises, and white balance measured as the imbalance between the red, green and blue channels. Each one is graded A to D with a plain-language fix.

Does this webcam test work on a phone?

Yes. On a phone or tablet the tool works the same way and you can switch between the front and rear cameras using the camera selector. The rear camera usually supports much higher resolutions than the front one, which the Resolution Scan will show. The page requires a secure HTTPS connection, which this site always uses.

Additional Resources

• Webcam - Wikipedia
• MediaDevices.getUserMedia() - MDN
• Frame Rate - Wikipedia