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Localtools

Webcam Test

Preview your camera, see the real resolution and frame rate, and save a snapshot.

Press Start camera and allow camera access when your browser asks.

Video stays on your device. Nothing is recorded or uploaded.

How to use

  1. Press Start camera and choose Allow when your browser asks for permission to use the camera.
  2. Check the live preview. If you have more than one camera, pick another one from the Camera list.
  3. Compare the actual resolution and measured frame rate with what your camera promises. Change the requested resolution to see what else it supports.
  4. Press Take snapshot to capture a still frame, then download it as a PNG if you want to keep it.
  5. Press Stop camera when you are finished so the camera light turns off.

What this webcam test checks

The test answers the questions that matter before a call or a recording: does the camera turn on, which camera is the browser using, what resolution is it really sending, and how smooth is the picture. It uses the same browser interface that video meeting sites use, so if your camera works here, it should also work in Google Meet, Zoom in the browser, Teams on the web and similar services.

When you press Start camera, the page asks the browser for a video stream with an ideal size. Browsers treat that size as a hint, not a demand, and pick the nearest mode the camera supports. The page then reads the true size of the frames from the video element and shows it as the actual resolution, together with the aspect ratio, such as 16:9 for widescreen or 4:3 for older cameras.

How the frame rate is measured

Instead of trusting the frame rate a camera advertises, the test counts frames as they arrive. In browsers that support it, the page is notified once for every new video frame and measures the time between frames over the last second. Older browsers fall back to checking for a new frame on every screen refresh, which works well up to your display’s refresh rate. A steady 30 fps is normal for most webcams; 24 fps or less is often a sign of poor lighting, while 60 fps is only offered by some gaming and streaming cameras.

Tips for a better picture

  • Light your face from the front. A window or lamp behind the camera beats any software filter, and it often raises the frame rate too. In a pinch, a full-screen white screen on a second monitor or tablet works as a soft fill light.
  • Clean the lens. Laptop cameras collect fingerprints, which make the picture look soft and hazy.
  • Use a direct USB port. External webcams at 1080p need plenty of bandwidth; a crowded hub can force a lower mode.
  • Check the requested resolution. If 1920×1080 drops the frame rate, 1280×720 may look smoother on calls.

Before a call, test your audio with the microphone test too. The video never leaves your browser tab, and the camera turns off as soon as you press Stop camera or leave the page.

Frequently asked questions

My browser never asked for permission, or I clicked Block by mistake. How do I fix it?

In Chrome and Edge, a camera icon with a red cross appears in the address bar after a block: click it, choose to always allow this site, and reload. In Firefox, click the crossed-out camera icon at the left of the address bar and remove the block. In Safari, open Settings for This Website from the Safari menu and set Camera to Allow. On a phone, also check that the browser itself has camera permission in the system settings.

Why do I see "The camera could not be started"?

Usually another program is already using the camera. Close video call apps such as Zoom, Teams or Skype, and other browser tabs that might have the camera open. On Windows, also check Settings, Privacy and security, Camera, and make sure desktop apps are allowed to use it.

Why is the actual resolution lower than what I requested?

The requested value is only a preference. The browser asks the camera for the closest mode it supports, so a 720p webcam returns 1280×720 even if you ask for 4K. Some cameras also reduce resolution in low light or over a slow USB connection.

Why is my frame rate only 15 fps?

Many webcams lower their frame rate when the room is dark so that each frame gets more light. Turn on a lamp facing you and the number usually rises to 30. A busy USB hub or a very high resolution can also limit the frame rate.

The preview is black. What should I try?

Check for a physical privacy shutter or a camera switch on the laptop keyboard. Then press Stop camera and Start camera again, unplug and reconnect an external webcam, or restart the browser.

Why is my webcam limited to 30 fps or 720p?

Usually that is the camera itself. Many built-in laptop cameras offer nothing above 1280×720 at 30 fps, and most webcams top out at 30 fps; 60 fps is mainly found on streaming webcams, often only at lower resolutions. An external 1080p webcam can also drop to a lower mode on a busy USB hub, so plug it straight into the computer. Request a higher resolution here: the actual resolution and measured frame rate show what the camera really delivers.

Why is the preview mirrored?

Most video call apps show your own image mirrored because it feels natural, like a mirror. Uncheck Mirror preview to see what other people see. Snapshots are always saved unmirrored.

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