Microphone Test

How to use

1. 1Click Start microphone. When the browser prompts for permission, choose Allow so this page can read the audio level.
2. 2Speak, clap, or make a steady sound. The live RMS meter and peak hold should jump immediately. The activity badge will flip from Silent to Signal detected.
3. 3Aim for peaks between -12 and -3 dBFS. If the meter stays near zero, the microphone may be muted at the operating system level or set as the wrong default device.
4. 4Use the Selected microphone picker to switch between a built-in mic, a USB headset, or a bluetooth device. The stream restarts with the new device.
5. 5Toggle Noise suppression, Echo cancellation, or Auto gain control and start the microphone again to compare raw and processed audio on the meter.
6. 6Use Reset peak to clear the peak hold marker between attempts. Click Copy on the diagnostics card to copy the readings for a bug report.
7. 7Click Stop microphone when you are done. The recording indicator in your operating system will turn off.

About this tool

Microphone Test confirms that a microphone is detected, granted, and actually delivering sound. After you press Start, the browser asks for microphone permission and the captured MediaStream is wired into a local Web Audio AnalyserNode. From there the page renders a live RMS level meter, a peak hold marker shown both as a percentage of full scale and as a dBFS value (decibels below digital clipping), a log-scaled frequency spectrum, and an activity badge that flips between silent, signal detected, and loud as you speak. Aim for peaks between -12 and -3 dBFS for clear speech without clipping. The device picker lists every audio input the browser will reveal, including built-in laptop mics, USB headsets, bluetooth earbuds, capture cards, and virtual cables from OBS or Loopback; switching microphones while the test is running restarts the stream with the new device. You can also toggle the noise suppression, echo cancellation, and auto gain control constraints that getUserMedia passes to the operating system, then start the microphone again to compare how raw and processed audio look on the meter. The captured audio is never played back through the speakers, so there is no feedback risk, and pressing Stop calls track.stop() on every track to release the microphone and turn off the recording indicator in your operating system. Everything runs in the browser. No audio is recorded, uploaded, or stored.

Free to use. Works in your browser. No signup, no login.