It requests access to your microphone and uses the HTML5 Web Audio API to capture the audio stream, rendering it as a real-time visual waveform on your screen.

No! The audio stream is only used to generate the visual waveform locally on your device. It is never recorded, saved, or transmitted to any server.

Make sure you have granted microphone permissions in your browser. Also, check that your microphone is correctly selected in your system's sound settings and is not physically muted.

Yes, as long as you are using a modern mobile browser (like Safari on iOS or Chrome on Android) and grant the necessary microphone permissions.

It is a high-level JavaScript API for processing and synthesizing audio in web applications, allowing us to build real-time visualizers directly in the browser.

Yes, the MIC TEST tool is completely free with no usage limits, sign-ups, or subscriptions required.

No. We do not store or log any of the data you check or record using our tools.

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