Online Tool Store
Mic Test
Test your microphone with a live level meter, waveform, input details, and playback recording for free. Audio stays entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Start the test, allow microphone access, and speak at your normal volume.
Live input
Not startedYour live level guidance will appear here.
Peak level
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Average level
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Sample rate
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Channels
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Active microphone
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Record a short sample and play it back to check clarity, background noise, and distortion.
How it works
- Start the test and allow microphone access when your browser asks.
- Speak normally while watching the waveform, live level, peak, and average.
- Switch inputs from the microphone menu if you need to compare devices.
- Record a five-second sample and play it back to check clarity and noise.
- Stop the test when finished to release the microphone immediately.
How the level is measured
The browser's Web Audio analyser supplies a short window of waveform samples. The tool calculates their root mean square (RMS) amplitude, then converts it to decibels relative to full scale:
RMS = √(Σ sample² / N) · dBFS = 20 × log₁₀(RMS)
The peak is the largest absolute sample seen since the test started. Because 0 dBFS is the digital ceiling, peaks close to zero have little headroom and can clip. The quality labels are practical speech-level guidance; playback remains the best way to judge noise and tone.
FAQ
Is my microphone audio sent anywhere?
No. The live analysis, short recording, and playback all stay inside this browser tab. Nothing is uploaded, and the recording disappears when you leave.
Why does the microphone test not start automatically?
Browsers require a click before a site can request microphone access. Select Start microphone test, read the explanation, then allow access in the browser prompt.
What does dBFS mean, and what level should I aim for?
dBFS means decibels relative to digital full scale: 0 dBFS is the maximum digital level, while more-negative values are quieter. The colored guidance is a practical starting point for speech, not a calibrated measurement.
Can this test detect every microphone quality problem?
No automatic meter can judge every issue. Level and peak readings help reveal silence, low gain, and clipping risk; use playback to listen for hiss, hum, dropouts, echo, muffling, or distortion.
Can I test more than one microphone?
Yes. After permission is granted, the microphone menu lists available audio inputs. Choose another device and the live test restarts with that input.
Why does the embedded version not get microphone access?
Microphone access inside an iframe requires an explicit allow="microphone" permission. Add allow="microphone" to the copied iframe tag when embedding this tool.
How we compare
| Feature | Online Tool Store | Windows Sound settings | Google Meet self-check |
|---|---|---|---|
| Works without opening a meeting or system panel | ✓ | Uses the Windows Sound panel | Available from a meeting preview |
| Live waveform and numerical dBFS | ✓ | Input test and recorded sample | Moving microphone bar |
| Short recording playback | ✓ | Available in current Windows 11 settings | Current help focuses on the live mic bar |
| Cross-platform browser access | ✓ | Windows only | Browser-based, tied to Meet |
Windows Sound settings are useful when you also need to change system input gain, and Google Meet's self-check is convenient before a call. For a quick cross-platform waveform, dBFS reading, and private playback sample without opening a meeting or system panel, Mic Test is the straightforward choice.