How to compare two webcams on one computer

One webcam looks sharper, or seems smoother, but it is hard to tell whether the camera is better or the lighting and settings changed. You can compare two webcams on the same computer by testing them in the same place, with the same light and browser.

The Camera Test shows a live preview, resolution, and frame rate. Check each webcam in turn, then compare what you see and the numbers the browser reports.

Compare the webcams fairly

1. Open the Camera Test and allow camera access when your browser asks. If another app is using a webcam, close that app first.
2. Set up both webcams in the same place, one at a time. Keep the camera at the same distance and angle, and leave the room lighting and background unchanged. A book or marked spot on the desk can help you put each camera in the same position.
3. Choose the first webcam using the camera choice shown in the test, if available. Wait for the preview to settle, then note the resolution and frame rate. Look at fine details, skin tone, and motion, not just whether the image looks bright.
4. Switch to the second webcam and repeat the check without moving the subject, changing the light, or resizing the browser window. If the test does not offer a camera choice, close the page, connect only the webcam you want to check, and open the test again.
5. Repeat the comparison once. Small changes in automatic focus or exposure can make one pass look different from the next.

For a useful comparison, write down each camera's resolution and frame rate, plus what you noticed in the preview. If you need to compare motion at fixed frame rates such as 24 and 30 fps, see how to compare webcam quality at 24 and 30 fps.

What the result means

One preview looks clearer

The clearer picture may come from a sharper lens, better focus, or more image detail. Check the same small details in both previews, such as hair, fabric, or text at a fixed distance. Auto focus can briefly blur the picture while it adjusts, so wait a few seconds before judging.

One webcam reports a higher resolution

The browser is receiving a larger video image from that camera. This does not prove the webcam has better optics or a sharper sensor. A camera can provide a high-resolution stream that looks soft, noisy, or oversharpened. Compare visible detail as well as the reported number.

One webcam reports a higher frame rate

A higher frame rate can make movement look smoother, but it is not a complete measure of picture quality. Frame rate can fall when the room is dim, the computer is busy, or the webcam shares a USB hub with other devices. Look for uneven or jerky motion in the preview too.

The webcams look almost the same

They may be similar in the conditions you tested, or the browser may be using a limited video mode. A video call app can request a different resolution or apply its own image processing, so the result in this test may not match every app exactly.

One webcam is missing or has no preview

The browser may not have permission to use it, the webcam may be in use by another app, or the computer may not recognize it. Try the fixes below before deciding the camera is faulty.

How to fix comparison problems

1. Close other camera apps. Quit video calls, camera apps, and browser tabs that might be using the webcam. Then reload the test and try again.
2. Allow camera access in your browser. Open the site permissions from the icon beside the address bar and set Camera to Allow. Reload the page after changing permission.
3. Check the computer's privacy setting. In Windows 11, open Settings › Privacy & security › Camera and turn on camera access and access for desktop apps. On a Mac, open System Settings › Privacy & Security › Camera and allow your browser.
4. Reconnect the webcam. For a USB camera, unplug it and connect it directly to another USB port rather than through a hub. Wait for the computer to detect it, then reload the test. For a built-in camera, restart the computer if it still does not appear.
5. Check which camera the browser selected. If the test has a camera choice, select the device you intend to compare. If there is no choice, close the test, disconnect the other webcam, and reopen the page with only the camera you want to test connected.
6. Check another app or browser. If the camera works in one place but not another, the device may be fine and the problem may be permission or browser selection. For more on that case, see camera works in one app but not another.

When a webcam may be faulty

Test the camera by itself in more than one app, and connect it to another computer if possible. If it repeatedly fails to appear, shows a black or corrupted image, or disconnects when its cable moves, the camera or cable may be damaged. A webcam under warranty is usually best returned or replaced. If the built-in camera fails on multiple apps after permission checks and a restart, contact the computer maker or a repair shop.

Why the preview can change between cameras

Webcams often adjust exposure automatically. Exposure is how much light the camera lets into the image. One camera may brighten a dim room more than another, but that can also make motion blur or image noise more noticeable. Keep the room evenly lit and avoid pointing one camera toward a window while the other faces a wall.

The browser can also negotiate a different video mode for each device. Resolution and frame rate are useful clues, but they do not show every detail of the camera's image processing. The Camera Test gives you a consistent browser-based check, while a video call app may use different settings.

The Camera Test asks for permission to show a live camera preview. You do not need to make a recording to compare the webcams.