How to inspect a camera's field of view in a browser

Your webcam shows your face, but not the whiteboard beside you. Or a video call seems to crop the room more tightly than the camera preview you expected. These differences can come from the camera lens, a selected resolution, or software that crops and reframes the picture.

Use the Camera Test to see a live preview and check the camera's reported resolution and frame rate. A simple, repeatable setup will help you tell how much of the scene fits in view, and whether another app is changing it.

Check the camera's field of view

Open the Camera Test and allow camera access when your browser asks. Wait for the live preview to appear.
Place the camera at the position and height where you normally use it. Sit or stand at your usual distance, and keep the camera and screen still while you test.
Put two objects, such as books or cups, at the left and right edges of the scene you want to capture. Check which objects and background details appear in the preview, and how much space remains around you.
Note the resolution shown by the test. If you can choose a different camera or resolution in the camera controls available on your device, change one setting at a time and compare the preview.
Open the app where the camera looks different and compare the framing from the same position. Keep your distance and the objects in the scene unchanged.

The test helps you compare the visible framing, not calculate an exact angle in degrees. For a fair comparison, keep the camera distance, height, lighting, and aspect ratio consistent. Aspect ratio means the shape of the picture, such as a wider rectangle or a more square image.

What the preview means

You can see the full scene you want

The camera's current framing fits your needs at that position. If a meeting app still cuts off part of the scene, the difference is likely caused by that app's video layout, camera selection, or framing feature. Check its camera settings and compare again.

The preview is too tight

The camera captures a smaller portion of the scene from your current position. Move the camera farther away or use a wider camera if one is available. If the view is wide in the Camera Test but tight in another app, look for a crop, zoom, or automatic framing setting in that app.

The preview looks wide, but the edges are distorted

A wide-angle lens can fit more into the frame, but it may stretch objects near the edges. This is a lens effect, not necessarily a fault. Place important faces and objects closer to the center if the distortion is distracting.

The picture changes when you move

If the framing follows you, an app or camera feature may be automatically panning, zooming, or cropping the image. Some video software uses automatic framing to keep a person centered. Compare with that feature turned off, if the app provides a control for it.

The preview is blank or shows the wrong camera

The browser may not have camera permission, another app may be using the camera, or the browser may have selected a different camera. Fix access first, then make sure you are comparing the same physical camera in each app.

How to fix unexpected framing

Check the camera's position. Move it farther away for a wider view, or closer for a tighter one. Keep it level and avoid pointing it sharply up or down, which can change how much of the room appears.
Allow camera access. Use the camera permission control beside the browser address bar to allow access, then reload the page. On Windows 11, check Settings › Privacy & security › Camera. On macOS, check System Settings › Privacy & Security › Camera and allow your browser. On Android, check Settings › Apps › your browser › Permissions › Camera. On iPhone or iPad, check Settings › Privacy & Security › Camera and allow the browser if it appears there.
Close other camera apps. Quit video meeting, recording, and camera apps, then reload the test. Another app may have control of the camera or may apply its own crop.
Check the camera selected in the other app. A laptop may have a built-in camera as well as an external webcam. Select the same camera you tested, and look for settings named zoom, framing, crop, or auto framing.
Compare the same resolution and picture shape. A camera or app may use a different resolution or aspect ratio, which can crop the sides or top and bottom. Compare like with like before deciding that the lens view changed.
Reconnect or restart the camera. For a USB webcam, unplug it, reconnect it directly to another port, and test again. If the framing remains wrong in multiple apps, restart the computer and repeat the comparison.

When the camera may be faulty

A narrow field of view by itself does not prove the webcam is broken. It may simply have a lens designed for close-up calls. Suspect a fault if the image is physically blocked, the lens cover will not open fully, the picture has a persistent dark edge, or the view changes when the cable or camera housing is moved.

Check the camera on another computer if you can. If the same abnormal picture appears there, inspect the lens and any privacy shutter without forcing them. For a new or covered webcam, contact the seller or manufacturer before opening it. A damaged lens or camera module usually needs replacement rather than a browser setting change.

Why a browser preview may look different

A browser requests a camera stream, and the camera or operating system supplies a supported picture size. The browser preview is not always identical to the video that another app sends to a call. That app may crop the image, use a different resolution, mirror the preview, or apply automatic framing.

The Camera Test reports resolution and frame rate, but it cannot reveal the lens's exact field-of-view angle or prove that another app will use the same crop. Treat the preview as a practical check of what the browser can see, then compare the target app using the same setup.

The camera test runs in your browser, and nothing you record is uploaded.