Greenlight

Test Your Microphone, Webcam & Speakers

Free, instant, works in your browser. No signup, no download, and nothing you say or show is ever uploaded.

No signup required Nothing is ever uploaded Works in Chrome, Firefox, Edge & Safari

🎤 Microphone Test

Speak normally and watch the meter move.

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Your audio is processed locally and is never recorded or sent anywhere.

📷 Webcam Test

Check your camera feed before a call.

Camera preview will appear here
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Your video never leaves your device — there is no upload, recording, or storage.

🔊 Speaker Test

Hear a short tone through each channel — no permission needed.

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Turn your volume up. The 10-second tone plays left, then right, then both channels.

🎙️ Record & Playback

Record ~10 seconds and hear exactly how you sound.

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Recording is capped at 10 seconds and stays in your browser's memory only — it's never uploaded, and it's cleared when you leave or refresh the page unless you download it.

How this test works

No installs, no accounts, no uploads.

This tool uses your browser's built-in getUserMedia and Web Audio APIs to talk directly to your microphone and camera hardware. When you click "Start," your browser asks your permission, then streams audio and video locally so you can see and hear that everything works. That stream is never sent to a server — this page has no backend, so there is nothing to upload to in the first place. Closing the tab or clicking "Stop" immediately releases your microphone and camera.

Troubleshooting & FAQ

Why can't my browser detect my microphone?

Usually one of three things: the site was never given microphone permission, the wrong input device is selected at the operating-system level, or another app (like a video call already in progress) is holding the microphone exclusively. Check your browser's site permissions, close other apps that might be using the mic, and confirm the right device is selected in your system sound settings. On Windows 11, also check Settings > Privacy & security > Microphone to make sure your browser is allowed access at the OS level — this is separate from the browser's own permission prompt. On a Mac, check System Settings > Privacy & Security > Microphone the same way.

My webcam shows a black screen — what's wrong?

A black preview usually means camera permission was blocked, the camera is already in use by another application, or a physical lens cover/privacy shutter is closed. Grant camera access when prompted, close other apps that might be using the camera, and double-check for a lens cover. On Windows 11, also check Settings > Privacy & security > Camera, and on a Mac check System Settings > Privacy & Security > Camera — both need your browser allowed at the OS level, on top of the in-browser permission.

How do I test if my left and right audio channels are both working?

Use the Speaker Test above — it plays a tone that pans from your left channel, to your right channel, to both together, so you can hear immediately if one side of your headphones, earbuds, or speakers is silent, swapped, or quieter than the other. This also catches cases where left/right output has been accidentally swapped in your OS sound settings. For a deeper walkthrough, see the Left & Right Speaker Test guide.

Microsoft Teams says it can't access my camera or microphone — what do I do?

That message — "Teams doesn't have access to your camera/microphone; to give access, select the site information icon in your browser's address bar and turn on your camera/mic" — is Teams reporting a browser-level permission block, not a hardware problem. First, run the mic and webcam test above to confirm your hardware and browser permissions actually work. If they pass here but Teams still fails, the issue is specific to Teams: either its own in-app permission toggle, or, for the Teams desktop app, your OS-level camera/microphone privacy settings, rather than your device itself. See the Microsoft Teams Mic Test guide for full steps, or the Teams Camera Not Working guide for camera specifically.

Does this site record or store my audio and video?

No. All processing happens locally in your browser. Nothing is uploaded, transmitted, or saved — refreshing or closing the tab ends the test completely and releases the devices.

How do I allow microphone or camera access in Chrome or Firefox?

Click the lock or camera icon in the address bar, open Site settings, and set Microphone and Camera to Allow, then reload the page. If you previously selected Block, you'll need to change it manually — browsers won't prompt again automatically once blocked.

I don't hear anything during the speaker test — what's wrong?

Start with the basics: check your system volume isn't muted or turned all the way down, and confirm the correct output device is selected in your OS sound settings — this trips people up constantly when Bluetooth or USB headphones are connected but the system is still routing audio elsewhere. Also check the browser tab itself isn't muted (right-click the tab in Chrome to check), and try a pair of wired headphones if you have them, to quickly tell whether it's a speaker hardware problem or a settings/routing problem.

Will this work before a Zoom, Google Meet, Microsoft Teams, or Discord call?

Yes — this is a quick way to confirm your hardware works before joining a call, independent of any single app's settings. If it works here but not in your call app, the issue is usually the device selected inside that specific app, not your hardware.

Does the Record & Playback tool save my voice anywhere?

No. The recording is held only in your browser's memory as a temporary file, never transmitted or uploaded anywhere. It disappears the moment you refresh or close the tab, unless you explicitly click "Download Recording" to save a copy to your own device.

Guides & fixes

Step-by-step help when your mic, camera, or speakers work here but not in your app — or not at all.

Microphone

Webcam

Speakers & headphones