Webcam looks stretched: aspect ratio or camera setting?

Your face looks unusually wide, or the whole webcam picture seems pulled sideways. The cause may be a mismatch between the camera image's shape and the shape your app displays, or a camera or app setting that changes the picture.

Compare the camera in a browser with the app where you notice the problem. The Camera Test shows a live preview and the camera's reported resolution, which can help you tell a stretched image from a cropped one.

Check the webcam image

1. Open the Camera Test and allow camera access when your browser asks.
2. Look at the live preview. Check whether familiar shapes, such as your face or a square object, look wider or narrower than they should.
3. Note the reported resolution. Divide the width by the height: a result near 1.78 is a 16:9 shape, while a result near 1.33 is a 4:3 shape. These are common formats, not a rule for every camera.
4. Open the video app where the image looks wrong and compare the same camera and scene. Check whether the problem appears in the browser preview too.

For a fair comparison, use the same webcam and avoid changing the camera position. If another app is already using the camera, close it before testing. Browsers ask for permission before using a camera.

What the result means

The browser preview looks normal, but one app looks stretched

The camera can produce a normal-looking image, so the problem is likely in that app's camera or video layout settings. It may be stretching the image to fill a frame with a different shape. Check the app's video settings and compare its preview with the Camera Test.

The image looks stretched in both places

The cause may be a camera driver, camera utility, virtual camera, or setting that affects more than one app. Try the fixes below. A browser test cannot identify every setting applied by the operating system or camera software.

The image has the wrong shape, but objects do not look stretched

This is more likely a crop or a different field of view than a stretch. A crop cuts off parts of the scene, such as the sides, while leaving the shape of objects intact. A stretched image changes their proportions.

The resolution ratio seems unusual

A ratio that differs from common formats does not prove anything is broken. Some cameras offer unusual or sensor-specific modes, and the browser may select a mode supported by the device. Judge the picture itself and compare it in another app before changing settings.

How to fix it

1. Check the app's video layout. In the app where the problem appears, look for a camera aspect ratio, video format, or fit option. If available, choose a setting that preserves the source proportions, rather than one that fills the frame by stretching. The wording differs between apps.
2. Choose the correct camera. If you have a built-in webcam, an external webcam, or a virtual camera, make sure the app is using the one you tested. Close extra video apps, then reopen the problem app so it requests the camera again.
3. Check camera permissions. On Windows 11, open Settings › Privacy & security › Camera and allow camera access for the app or desktop apps as needed. On macOS, open System Settings › Privacy & Security › Camera and allow access for the app. Then quit and reopen it.
4. Review available camera controls. On Windows 11, open Settings › Bluetooth & devices › Cameras, select the camera, and check which controls it offers. These controls vary by device. macOS does not provide one universal system setting for webcam aspect ratio, so check the video app or camera maker's utility instead.
5. Turn off camera effects temporarily. Disable virtual backgrounds, auto-framing, or other image effects in the app or camera utility, then compare the picture again. These features may crop or reframe the view, though they should not normally distort the proportions of objects.
6. Update or reconnect the webcam. For an external camera, unplug it and try another USB port. On Windows, check for a camera driver update through the computer or camera maker. Restart the computer after an update and retest.

Aspect ratio, cropping, and stretching

Aspect ratio describes the relationship between an image's width and height. For example, a 1280 by 720 image is 16:9 because its width is about 1.78 times its height. A 640 by 480 image is 4:3, with a width 1.33 times its height.

If an app puts a 4:3 image into a 16:9 frame and fills every part of the frame by stretching, circles may look oval and faces may look broad. If it preserves the image proportions, it may instead show empty space at the sides or crop part of the top and bottom. Cropping changes what is visible; stretching changes the shape of what remains.

When the webcam may be faulty

A wrong-looking shape is more often caused by software or display settings than by a damaged camera sensor. If an external webcam still looks distorted in several apps after you turn off effects and check the settings, test it on another computer. If the same fault follows the camera, contact its manufacturer or consider a replacement. For a built-in webcam that remains distorted across apps, ask the laptop maker or a repair shop to inspect it.