DeviceChecker

Webcam & Camera Test

Verify your webcam video feed, picture clarity, and hardware resolution instantly in your browser. Completely private with zero software installation.

Test Your camera

Click Start Test to grant temporary browser access to your webcam. DeviceChecker will display your live video stream to verify your camera is functioning properly.

Your media streams never leave your device.

How to Test Your Camera

01

Click "Start Test"

Initiate the diagnostic by clicking the blue button in the test card above.

02

Allow Permission

When your browser displays its security prompt, select "Allow" to permit camera access.

03

Verify Video Stream

Confirm your video is visible in the viewfinder and review the verified resolution readout.

Understanding Your Results

Our camera diagnostic connects directly to your device via HTML5 WebRTC. To ensure complete accuracy, here is what this test verifies:

What This Test Confirms
  • Browser successfully establishes connection to camera hardware
  • Active video frame delivery and live stream readyState
  • Negotiated sensor resolution (e.g. 1920×1080 Full HD)
  • Operating system device driver communication
What Requires Your Visual Inspection
  • Lens clarity, focus accuracy, and optical smudges
  • Color balance, lighting quality, and sensor noise
  • Physical shutter blockage or partial lens obstruction
  • Physical hardware cracks or internal lens defects

Camera Troubleshooting Guide

Resolve common webcam connection, black screen, and permission issues quickly.

The webcam LED turns on, but the video preview is black or blank
Another application (such as Zoom, Teams, Discord, or FaceTime) is likely holding an exclusive hardware lock on the camera. Completely quit those applications, close other browser tabs that may be using video, and restart the test.
The browser shows "Camera Access Blocked" or "Permission Denied"
Check your browser's site settings and allow camera access for this site, then reload the page.
The video feed is completely dark or obstructed
Check whether your laptop or external webcam has a physical privacy shutter, slider, or lens cap covering the sensor. Some keyboards also feature a dedicated camera kill-switch key (e.g., F8 or F10 on certain HP and Lenovo laptops).
The test connects to the wrong camera or a virtual camera
If you have multiple devices connected (e.g., an internal laptop camera and a USB webcam), use the "Switch Camera" dropdown at the top right of the test card to select your preferred video input.
Browser reports "No camera was detected on this device"
Verify that your camera is firmly plugged in (for USB webcams) and that your operating system has enabled camera access under Windows Privacy & Security > Camera or macOS System Settings > Privacy & Security > Camera.

Frequently Asked Questions About Camera Testing

Common questions regarding privacy, browser security permissions, and webcam compatibility.

Is my camera video recorded, saved, or uploaded to any server?
No. DeviceChecker operates under a strict zero-upload privacy architecture. Your video stream is created in your browser memory via the HTML5 getUserMedia API and displayed directly on your screen. No video frames, screenshots, or metadata are ever transmitted over the network.
Why does my browser prompt for camera permission?
Web browsers enforce security sandboxes to protect user privacy. Websites cannot access your webcam without explicit, per-site permission. When you click "Start Test", your browser displays its native security prompt asking to allow camera access for this session.
My camera works in Zoom and Teams, but not in this browser test. Why?
Desktop apps like Zoom or Teams can lock the webcam hardware exclusively, preventing web browsers from reading the video stream. Additionally, your operating system (macOS System Settings or Windows Privacy & Security) may permit desktop apps while blocking your web browser. Try closing other video applications and checking your OS camera permissions.
Which web browsers support this camera test?
The camera test runs on all modern browsers supporting WebRTC MediaDevices, including Google Chrome, Mozilla Firefox, Apple Safari (iOS 11+ and macOS), and Microsoft Edge. A secure HTTPS connection is mandatory for browser camera access.
What resolution should my webcam display?
Standard built-in laptop webcams typically deliver 720p (1280×720) or 1080p (1920×1080). External USB webcams may support Full HD (1920×1080) or 4K (3840×2160). Our test negotiates the highest available native resolution provided by your camera hardware.
Can I test external USB webcams and virtual cameras?
Yes. If your operating system recognizes the external webcam or virtual camera (such as OBS Virtual Camera), it will appear in the "Switch Camera" dropdown once access is granted.

Browser Camera API Compatibility

Confirmed HTML5 getUserMedia camera support across desktop and mobile browsers.

Browser hardware API feature support breakdown
Feature / DiagnosticChromeFirefoxSafariEdgeNotes
Webcam Video Stream (getUserMedia)FullFullFullFullStandard WebRTC MediaDevices API; requires secure HTTPS context.
Device Selection & EnumerationFullFullFullFullDevice labels are hidden by browser policy until permission is granted.
Resolution & Framerate DetectionFullFullFullFullReads real negotiated hardware track settings directly.
Mobile Front / Rear Camera SwitchingFullFullFullFullRequires user gesture (button tap) to trigger stream playback on iOS Safari.

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