Webcam & Microphone Tester
Test your webcam and microphone in-browser with live video preview, resolution detection, real FPS measurement, audio level meter, and device enumeration.
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What is Webcam & Microphone Tester?
The Webcam & Microphone Tester lets you verify that your camera and microphone are working correctly before joining a video call, recording a video, or going live. Using the browser MediaDevices (getUserMedia) API, it shows a live HD video preview, reports the actual resolution and frame rate your camera delivers, and displays a real-time audio level meter so you can confirm your mic picks up sound. It also enumerates every connected camera, microphone, and speaker. Everything runs locally in your browser — no video or audio is recorded or uploaded.
Key Benefits
- Confirm your camera and mic work before an important video call
- See actual measured FPS and resolution, not just what the specs claim
- Real-time audio meter with peak hold for quick mic diagnostics
- List all media devices to pick the right one in other apps
- 100% client-side — no recording, no upload, fully private
Common Use Cases
- •Pre-call check before Zoom, Teams, Google Meet, or Webex meetings
- •Diagnosing why a webcam shows a black screen or poor quality
- •Verifying a new USB camera or microphone is recognized by the browser
- •Testing mic sensitivity and background noise levels for podcasting
- •Checking device permissions and camera FPS for live streaming setups
How to Test Your Webcam and Microphone
- Choose what to test: Click "Test Camera + Mic" to start both, or pick "Camera Only" / "Mic Only" if you want to test one device at a time. Your browser will ask for permission to access them.
- Allow camera and microphone access: When the browser permission prompt appears, click Allow. If you deny it, the tool shows a clear permission error. You can retry by clicking the button again.
- Check the video preview: Watch the live video preview. The tool displays the camera label, resolution (width × height), aspect ratio, requested frame rate, and the actual measured FPS.
- Test the microphone: Speak into your microphone and watch the audio level bar move in real time. The peak meter captures the loudest moment — click Reset Peak to start a new measurement.
Key Features
- Live HD video preview with instant camera activation
- Real-time audio level meter with peak hold and reset
- Actual measured FPS using requestVideoFrameCallback
- Detects resolution, aspect ratio, facing mode, and device ID
- Enumerates all available cameras, microphones, and speakers
- 100% client-side — video and audio never leave your browser
Frequently Asked Questions
Does this tool record or save my video and audio?
No. The Webcam & Microphone Tester streams your camera and mic only to a live preview on your screen using the browser MediaDevices API. Nothing is recorded, uploaded, or stored. When you click Stop, the stream is immediately terminated and all tracks are released.
Why does my browser ask for permission?
Browsers require explicit user consent before any website can access the camera or microphone, as a privacy protection. You must click Allow in the permission prompt. If you accidentally deny it, click the camera icon in your browser address bar, change the permission to Allow, and reload the page.
The video preview is black or the mic shows no level — what should I do?
First, make sure no other app (Zoom, Teams, OBS) is using the camera or mic exclusively. Check your operating system privacy settings to ensure the browser is allowed to use those devices. If that fails, try a different USB port, close other browser tabs using the camera, or restart the browser.
Why is the measured FPS lower than my camera specification?
The measured FPS reflects the actual frames reaching the browser under current lighting and system load, not the camera hardware maximum. Low light forces many webcams to drop frame rate to increase exposure time. Try improving lighting or switching to a resolution that your camera supports natively.
Featured in Collections:Hardware Diagnostics & Electronics Lab