Camera & Mic Test.
Check your camera and microphone together before you join a call. Press Start for a live preview and a real-time level meter that jumps when you speak — so you know, in one glance, that both your picture and your voice are working. Everything runs in your browser and nothing is recorded or uploaded.
Click Start, then allow camera + mic access
Speak to test your mic
Camera + mic check.
What a combined check confirms
- The picture is liveA moving preview rules out a covered lens or the wrong camera. What you see here is exactly what your call app will send.
- The mic actually hears youThe level bar reacts to your voice in real time. If it moves when you talk, your microphone is capturing sound — the single most common thing people get wrong before a call.
- The right mic is selectedHeadsets, webcams and laptops each bring their own microphone. The picker lets you confirm the one that's live is the one you want to be heard on.
- Both at once, in secondsInstead of testing camera and mic in two different places, you see them side by side — the fastest possible pre-call sanity check.
How to test your camera and mic
- 1Press Start test. Your browser asks for both camera and microphone permission. Choose Allow — the feed only ever appears on this page.
- 2Watch the preview. Move a little; a live picture confirms the camera is working and correctly selected.
- 3Say a few words. Watch the level meter jump as you speak. Movement means your microphone is being heard; a flat bar means it isn't picking you up.
- 4Pick the right devices. Use the Camera and Microphone dropdowns to switch hardware if the wrong one is active. For a deeper picture check, open the full webcam test.
How the camera & mic test works
Pressing Start calls getUserMedia asking for both video and audio. The browser prompts you once, then returns a single stream carrying a camera track and a microphone track. The camera track is attached to the on-page preview; the microphone track is fed into the Web Audio API.
For the meter, an AnalyserNode samples the raw audio many times a second and we compute the signal's loudness (its RMS level) to drive the bar and a peak marker. Nothing is recorded — the samples are read, turned into a number, and discarded frame by frame. The mic is only ever measured, never captured to a file.
Everything is local: no server sees your camera or microphone, and both tracks are released the instant you press Stop or leave the page — you'll see the webcam light go out. If the test won't start, it's almost always a blocked permission, a device already in use by another app, or a page that isn't served over HTTPS.
When to test camera and mic together
Before a video meeting
The classic pre-call check — confirm Zoom, Teams, Meet or Webex will have a working picture and voice before you join.
Before an interview
Nothing undermines a remote interview like a frozen camera or a dead mic. Verify both a few minutes ahead.
New headset or webcam
Just plugged in new gear? Confirm the browser sees it and it's the selected camera and microphone.
Troubleshooting "they can't hear me"
See instantly whether your mic captures sound at all, or whether the problem is the meeting app's device choice.
Switching devices
Moving between a laptop mic and a headset? Check the level bar reacts to the right one.
Streaming and recording setups
Line up camera and mic before you go live, so your first take isn't silent or black.
Camera & mic test glossary
- Level meter
- A bar that shows how loud your microphone signal is right now — it should move when you speak.
- RMS level
- Root-mean-square: a measure of average loudness over a short window, used to drive the meter smoothly.
- AnalyserNode
- A Web Audio node that exposes the live waveform and frequency data of an audio stream for metering.
- Peak
- The loudest point the meter has recently reached — a marker that helps you spot clipping or spikes.
- Input device
- The specific microphone (or camera) the browser is currently using, chosen in the dropdown.
- getUserMedia
- The browser API that, with permission, opens the camera and microphone and returns a live stream.
Frequently asked questions
How do I test my camera and microphone before a call?
Press Start and allow access when the browser asks. You'll see a live camera preview and a microphone level meter side by side. If the picture is moving and the meter jumps when you speak, both are working and ready for your Zoom, Teams, Meet or interview call. Use the dropdowns to pick the exact camera and mic you want to use.
The mic meter isn't moving — what's wrong?
Check that the right microphone is selected in the dropdown, that it isn't muted at the OS or hardware level (many headsets have a physical mute), and that the browser was granted microphone permission. If you allowed the camera but not the mic, reopen the site permissions and enable both, then Start again.
Do you record my camera or microphone?
No. Both the video preview and the mic metering happen entirely in your browser. The audio is measured sample by sample to move the bar and then discarded; no frame or sound clip is ever saved or uploaded. Stopping the test or leaving the page releases both devices immediately.
Why does the browser ask for two permissions?
Because this test uses both your camera and your microphone, the browser asks for each. You can allow both at once in the prompt. If you only allow one, the test will still show whichever it got — but for a full pre-call check you want both enabled.
Can I test just the microphone or just the camera?
This tool is designed to check both together, which is what you want before a call. If you only need one, the dedicated webcam test focuses on the picture, and the level meter here works on its own if you deny camera access — though allowing both gives the complete picture.
Does it work on my phone?
Yes. Open the page in your phone's browser and allow access; it uses the front camera and the phone's microphone by default. The meter and preview work the same as on a computer.