Webcam Test – Check Your Camera Online (Resolution, FPS, Mic)

How to test your webcam

1. Choose the resolution you want to check. 720p is a sensible start; pick 1080p or 4K to find out what the camera can really deliver. If you have more than one camera, the list fills with their names after you allow access the first time.
2. Press Start camera and choose "Allow" in the browser prompt. The live preview appears, and the results box shows the resolution the camera actually delivers, its aspect ratio and quality class.
3. Give it two or three seconds. The measured frame rate and the brightness of the picture update every second, so you can see how they react when you turn a lamp on or off.
4. Use Grid to line up your eyes with the upper third of the frame, and Mirror to see the picture the way others will see it. Press Take snapshot to freeze a frame and look at sharpness and color in detail; downloading it is optional.
5. Press Stop when you are done. The browser releases the camera, the light next to the lens goes out and other apps can use it again.

What the results mean

Resolution is the size of each frame in pixels, read from the video element after the first frame has arrived, so it is the real size and not the number on the box. Aspect ratio reduces that size to a simple ratio: 640×480 is 4:3, the shape of older webcams, while 1280×720 and 1920×1080 are 16:9, the widescreen shape most call apps expect. When the numbers do not reduce neatly, as with 1366×768, the page shows the closest common ratio with an approximately sign. The quality class is based on the short side of the frame, which is how 720p, 1080p and 2160p (4K) are defined, so a phone held upright that sends 720×1280 is still labelled 720p.

There are two frame rate rows. The reported rate is what the driver and the browser agreed on when the camera started. The measured rate counts the frames that were really drawn on this page during the last second, using the browser's video frame callback where it is available and a simpler estimate elsewhere. If the two are far apart, something between the sensor and the screen is slowing down: usually low light, sometimes a busy processor or an overloaded USB port. The brightness row is the average light level of a small, scaled-down copy of the current frame, sampled once a second. A reading of a few percent means the sensor is getting almost no light, which points to a closed shutter or a covered lens rather than a broken camera.

The capabilities list comes straight from the browser and can include the maximum resolution and frame rate, the focus, exposure and white balance modes, a zoom range and, on many phones, a torch. When the camera offers zoom or a torch, a slider or a switch appears so you can try them. Some browsers report only a few capabilities or none at all, and the page says so instead of guessing.

Why the resolution can be lower than advertised

The resolution menu asks for a size as an ideal, not as a strict demand, so the browser picks the nearest mode the camera supports and the test never fails just because a size is missing. If you request 4K from a 1080p webcam, you get 1920×1080 and a note telling you so; that is a useful way to find the true maximum. Only when the browser rejects a request outright does the page step down one level at a time, from 4K to 1080p, 720p, 480p and finally the camera default, and it tells you which level worked.

A lower result than expected has a few typical causes. Many webcams sold as 1080p send full resolution only in a compressed mode, and some drivers offer that mode at a lower frame rate. A camera plugged into a USB 2.0 port, a hub shared with other devices or a long extension cable may not have the bandwidth for 1080p at 30 frames per second, so it falls back to 720p. Video-call apps often cap the outgoing picture at 720p anyway to save bandwidth, so a perfect local result does not guarantee the same quality on the other end of a call.

Before a video call or an interview

A two-minute check saves an awkward start. Put the camera at eye level, using a stack of books under a laptop if needed, so people are not looking up your nose. Turn on the grid and keep your eyes near the upper horizontal line, with a little space above your head. The best light comes from the front, for example a window or lamp behind the screen; a bright window behind you turns your face into a silhouette, and the brightness row will show the picture as dim. Clean the lens with a soft cloth, since a fingerprint makes the whole image look hazy. Take a snapshot to check what is visible in the background before anyone else sees it.

Watch the measured frame rate while you test. If it is around 30 fps in daylight but drops to about 15 fps in the evening, the camera is lengthening its exposure to gather more light. A desk lamp aimed at a wall in front of you usually brings it back up and also reduces grain.

Webcam not working? A checklist

• Permission blocked. If you dismissed the prompt or clicked Block, the browser remembers that choice. The page opens step-by-step help for the browser, Windows, macOS, iPhone and Android, with your own system highlighted.
• Camera in use. On Windows a camera usually works with only one app at a time. If a call app, streaming software or another browser tab holds it, the page tells you that the camera is probably in use by another app. Close those programs and try again.
• No camera found. Check the cable and try another USB port. Some laptops have a function key or a physical switch that disconnects the camera completely.
• Black picture with no error. Look for a sliding privacy shutter above the screen or a sticker over the lens. The brightness row reads "almost black" in this case.
• Virtual cameras. Streaming tools, background-effect software and apps that turn a phone into a webcam add extra entries to the camera list. If one of those is selected while its program is closed, you may see a blank or placeholder image. Pick the physical camera instead.
• Drivers. On Windows, open Device Manager → Cameras and look for a warning sign; a restart or a driver update from the laptop maker usually fixes it.

Phones, tablets and the microphone

On phones and tablets the page shows a Switch front/back button. The front camera starts mirrored, as in a selfie app, and the back camera starts unmirrored. Held upright, a phone sends a tall picture, so the aspect ratio reads 9:16 instead of 16:9. Mobile browsers also pause the camera when you switch apps, and this page does the same on every device: when the tab is hidden, the camera and microphone are stopped so they are never left running in the background.

The quick microphone check below the camera shows whether sound arrives at all, with a live level bar and a reading in dBFS, where 0 is the loudest possible digital signal and normal speech usually sits between about -30 and -12. For a recording you can play back, a choice between several microphones and the echo and noise switches used in calls, open the full Mic Test.

Privacy

This webcam test is a plain web page that runs entirely in your browser. The video stream goes from the camera to the video element on this page and nowhere else: there is no upload and no account, the tool itself sets no cookies and runs no tracking script, and you can confirm in the network tab of your browser's developer tools that no video is sent. The ads on this page are loaded by a separate script, and the tool never passes it any picture or sound. A snapshot is held in the tab's memory as an image; it is saved to your disk only when you press Download PNG and is gone when you reload or close the page. The browser shows a camera indicator while the camera is on, and pressing Stop, hiding the tab or closing the page switches it off.

Frequently asked questions

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