Webcam Test

Press Start webcam test, allow camera access, and your live preview appears alongside the numbers that matter: the resolution the camera is actually delivering (not what the box claims), its aspect ratio, and a measured frame rate counted from real frames. The capabilities panel shows the camera's maximum resolution, frame-rate range, facing mode, and which controls (zoom, focus, exposure…) the browser exposes.

Test supported resolutions goes further than any "camera check" page: it asks the camera for each standard size from QVGA to 4K with browser scaling turned off, and reports which ones it outputs natively, which the browser only fakes by scaling, and which it can't do. Take a snapshot to save a full-resolution PNG.

Nothing is uploaded. The video goes from your camera to this tab and nowhere else — there's no account, no server, and Stop turns the camera light off immediately.

Common uses

• Check your camera works before a Zoom, Teams, Google Meet, or interview call
• Verify a "1080p" or "4K" webcam really delivers that resolution and frame rate
• Find out why video looks choppy: a low measured fps usually means poor lighting (the camera lengthens exposure) or a USB bandwidth limit
• Pick the right camera when a laptop has several, or a virtual camera (OBS) is installed
• Grab a quick full-resolution still to compare image quality between webcams

Example

USB webcam
Requested: 1080p

Resolution 1920×1080 (1080p)
Aspect ratio 16:9
Measured 29.9 fps
Max 1920×1080 · 5–30 fps

If a 1080p camera shows 640×480 here, it is usually because another app or the requested-resolution option limited it — try 1080p in Options, or close apps that share the camera.

Limitations

• Browsers only allow camera access on secure (https) pages after you click Start and grant permission, and hide camera names until then.
• A camera can only be used by one app at a time on many systems; close video-call apps first if the test reports the camera is busy.
• Measured frame rate depends on lighting and on your display refresh rate — in a dim room most webcams drop from 30 to 15 fps on purpose.
• The capability ranges and the resolution probe rely on what the browser reports; Safari and Firefox expose fewer details than Chrome and Edge.

How do I test my webcam online?

Press Start webcam test and allow camera access when the browser asks. If the camera works you'll see yourself in the preview, with its real resolution and measured frame rate listed underneath. Use the Camera list to switch between cameras.

Is this camera test private? Is my video recorded?

No video leaves your device. The preview and every measurement run inside this browser tab; nothing is uploaded or recorded, snapshots are only saved if you download them, and Stop releases the camera straight away.

Why is my webcam not working or showing a black screen?

The most common causes are a blocked permission (click the camera or lock icon in the address bar and allow it), another app such as Zoom or Teams already using the camera, a physical privacy shutter or keyboard camera switch, or on macOS/Windows the system-level camera privacy setting being off for your browser.

What resolution is my webcam?

Start the test and read the Resolution row — that is the size the camera is delivering right now. The Max resolution row shows the largest size it reports, and Test supported resolutions lists exactly which standard sizes (720p, 1080p, 4K and others) it outputs natively.

Why does my 1080p webcam only show 640×480?

Browsers and some apps open cameras at 640×480 unless a larger size is requested. This test asks for 1080p by default; you can request 720p, 1440p or 4K in Options. If it still stays low, the camera may be on a slow USB port or hub, or it isn't really a 1080p sensor.

Why is my webcam frame rate low or choppy?

In low light most webcams lengthen exposure and drop from 30 to 15 fps or less, so add light facing you first. Other causes are USB 2.0 bandwidth at high resolutions, CPU load, or a virtual-camera layer. The Measured frame rate row counts real frames so you can see the effect of each change.

Why is my camera preview mirrored?

Previews are mirrored by default because that feels natural, like looking in a mirror. Other people on a call see the unmirrored image, and snapshots are saved unmirrored too. Turn off Mirror preview to see yourself the way others do.

Can I test my phone's front and back camera?

Yes. Open this page in Safari or Chrome on your phone, press Start, and choose the front or back camera from the Camera list; the Facing row shows which one is active.