Check that your microphone works in real time. Your audio never leaves this browser.
π This tool never uploads or stores your microphone audio. Everything is processed locally, inside this browser tab.
Press start and allow microphone access.
Checking your mic before a video call, online class, or voice chat avoids the classic "can you hear me?" moment. This tool uses the browser's Web Audio API to show your live input level as a moving bar and a number, with no software to install β just open the page and click start.
Click "Start test" and your browser will ask for microphone permission. Once allowed, the real-time level meter starts moving. Speak in your normal tone and check that the bar sits in the green-to-yellow range. If it constantly hits red, your input gain is likely too high and may cause clipping. If more than one microphone is connected, switch between them from the device dropdown.
The meter shows the instantaneous loudness (RMS) of your mic input on a 0-100 scale. A quiet room is usually under 5, normal conversation sits around 20-60, and shouting or speaking too close to the mic can push it past 80. The "Peak" reading briefly holds the loudest sound detected so far, so you won't miss a sudden noise like tapping the microphone.
If the meter never moves, check in order: (1) your OS has granted microphone permission to this browser, (2) the correct input device is selected in your system sound settings, (3) any physical mute switch or button is off, (4) a USB microphone's cable is properly connected. A laptop's built-in mic can be blocked from the browser if another app (like conferencing software) already has exclusive access to it.
This tool only feeds microphone audio into a Web Audio AnalyserNode inside your browser β it is never sent to any server or saved to a file. Clicking "Stop" or leaving the page immediately releases the microphone stream. Your browser also shows a microphone indicator near the address bar whenever it is actually active, so you can always verify it visually.