Webcam Test
The picture lives in your browser only. No upload, no recording, unless you take a snapshot, which saves straight to your disk. Use it before a call, or when you are buying a used webcam and want proof it works.
How the test works
Pressing Start asks the browser for camera access and requests up to 1920 × 1080. The three cards show what the camera actually delivered, not what the box promised. The browser negotiates that with the driver, so the numbers you see are the same ones a video call would get. Nothing leaves your device; the only file ever created is a snapshot, and only if you take one.
Reading your numbers
A "1080p" webcam showing 1280 × 720 here is common. Many cameras fall back to a lower mode in certain browsers or USB ports, and no settings menu will tell you it happened. Frame rate tells a similar story. A camera that claims 30 fps will hit it in good light and quietly drop to 15 in a dim room because exposure time eats the frame budget. So test in the lighting you actually use. Smooth picture with low numbers? Trust the picture. Stuttering while people talk over each other? The frame rate readout is your evidence.
If the picture is black or missing
Check the dumb thing first: privacy shutter or lens cap. Then browser permission. Then other apps. Zoom, Teams and OBS can hold a camera exclusively, and closing them fixes a surprising number of "broken" webcams. On desktops with several inputs, the wrong device is often the culprit, and the dropdown above switches in one click. A built-in laptop cam that fails with a black image and no error usually wants a driver reinstall. An external webcam that fails on every computer it touches has earned a warranty claim; a screenshot of this page's error counts as reasonable evidence.
The webcam test guide covers the full checklist, including what to test before buying a used camera. If the image works but looks awful, the grainy webcam fix guide sorts a dirty lens from a failing sensor before you spend money.
Frequently asked questions
Is my camera feed uploaded anywhere?
No. The preview is rendered by your browser from the camera feed and never leaves your device. There is no upload endpoint, no account and no recording unless you click the snapshot button, and that file is saved straight to your own disk.
Why does my browser ask for camera permission?
Browsers block camera access until you approve it per site. That is a privacy rule, not a bug: the test cannot see a single frame until you click Start and allow the prompt, and you can revoke the permission in the address bar the moment you are done.
The preview is black but permission was granted. What now?
Another app is usually holding the camera. Zoom, Teams and OBS can lock exclusive access; close them fully (check the system tray, not just the window) and press Start again. On laptops, also check for a physical privacy shutter or a camera kill switch on the keyboard.
My webcam shows 720p but the box says 1080p. Which is right?
Both can be. The browser negotiates the stream at the resolution it can deliver under current lighting and bandwidth conditions. Good lighting often unlocks the full sensor resolution, so retest in a bright room before concluding the camera is not 1080p.
Why does my webcam stutter or freeze in a dim room?
That is the frame rate falling, not a network problem. Low light makes the camera lengthen exposure time, which eats frames; a 30 fps camera drops toward 15 fps in a dim room. The frame rate card is your evidence: retest in the lighting you actually use, and if the number is low while the picture looks smooth, trust the picture. If it stutters while people are moving, the readout just proved the camera cannot keep up.
I bought a used webcam and it looks fine here. What else should I test before paying?
Check the lens for scratches and dust under a bright light, then test the autofocus by moving the camera close and far — a used camera with a jammed focus motor still shows a sharp picture only at one distance. Listen for a clicking or grinding sound while it refocuses. Finally, run the camera on a second computer; a camera that works on only one machine has a handshake or driver issue that will bite you later.
My built-in laptop webcam picture is blurry, even though my screen is sharp. Is that normal?
No — a soft picture is a real fault, just a common one. Built-in webcams have tiny sensors and fixed-focus lenses, so they soften as you move away from the ideal distance (about arm's length). If it is blurry at that distance, check for a protective film over the lens, clean it, and test in good light. If it stays soft, the sensor may be failing — and a screenshot of the blur is fair evidence for a warranty claim.
The dropdown lists several cameras. How do I know which is which?
The browser names devices the way the OS does, so look for the make and model, not the label. On a desktop, external cameras usually carry their brand name; built-in ones say something like "Integrated" or "FaceTime" or "HD Camera". If two names look identical, unplug one and watch which entry disappears. The dropdown is the same list a video call uses, so the entry you pick here is the one you should select there.