How to test your microphone online

• Click Start and allow microphone access when prompted by your browser
• Speak or make sound — the frequency spectrum and level meters respond in real time
• After a few seconds, a diagnostic panel appears confirming whether your mic is working, with details on signal strength, background noise, and clipping
• Click Record to capture a clip, then play it back to hear how you actually sound
• Use Test for echo to check if your speakers are feeding audio back into your microphone

Understanding audio levels

The tool displays three key measurements to help evaluate your microphone signal:

• Volume (RMS) — the average signal level, representing perceived loudness. For speech, aim for 20–60%
• Peak — the highest instantaneous level. If this consistently hits 100%, your signal is clipping and will sound distorted
• dBFS — decibels relative to full scale. 0 dBFS is the maximum; typical speech lands between -20 and -6 dBFS
• Noise Floor — the ambient noise level when you are not speaking. Below -40 dB is a quiet room; above -28 dB indicates significant background noise

Echo and feedback detection

Audio echo happens when your microphone picks up sound from your speakers, creating a feedback loop. This is common when using built-in laptop speakers and microphone together, or when two devices in the same room both have their microphones and speakers active. The echo test plays a brief 3 kHz tone through your speakers and checks whether the microphone picks it up. If echo is detected, the best fix is to use headphones or reduce your speaker volume.

Common microphone problems

• Mic not detected — check browser permissions, make sure no other app has exclusive access, and verify the device is enabled in your OS sound settings
• Signal too quiet — increase microphone gain in your system settings, move closer to the mic, or check if a hardware mute switch is engaged
• Clipping / distortion — reduce mic gain or move further from the microphone. The clipping counter shows how often the signal exceeds the maximum level
• Too much background noise — enable noise suppression (shown in device info), use a directional microphone, or move to a quieter environment
• Echo / feedback — use headphones, lower speaker volume, or enable echo cancellation in your audio settings

Privacy

This tool runs entirely in your browser. Audio is processed locally using the Web Audio API and MediaRecorder API. No audio data is transmitted to any server. Recordings exist only in browser memory and are discarded when the page is closed.