Developer Essentials · Free Tool
Microphone Tester
Check that your microphone works — see a live input-level meter and waveform react to your voice. Nothing is recorded or uploaded; the audio never leaves your device.
Input level
How it works
After you grant access with getUserMedia, the microphone signal is fed into a Web Audio AnalyserNode. The meter shows the current loudness (RMS) and the canvas draws the live waveform, so you can confirm your mic is picking up sound and roughly how loud. It's analysis only — nothing is recorded, stored or transmitted, and it stops when you press Stop.