A browser-based audio level meter that uses your device microphone to measure and display signal levels in real time.
Press MIC to start monitoring. Your browser will ask for microphone permission — this is required for the tool to work. Audio is processed locally in your browser and is never recorded or transmitted.
Press TEST to run a simulated signal sweep across the full range. Useful for checking the display without a microphone.
Any level above 85 dB is logged to the Peak History with a timestamp. The all-time maximum is shown at the top of the list. Press RESET to clear all history and return to standby.