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Mic Test (Online Microphone Test)

Allow the microphone and say a few words. If the level bar moves, your mic works. The tool also checks for low volume, clipping and noise floor, and records 5 seconds for instant playback so you hear what others hear on a call.

Local analysis · No uploads

Input level

Privacy: Microphone audio is analysed locally for levels only; it is never recorded to a server or uploaded. The 5-second recording exists only in memory and disappears when you refresh.

RMS dBFS—
Peak dBFS—
Noise floor dBFS—
Clipping—
Verdict—

Estimated dB

—dB(A)
Min—
Max—
Average—
Equivalent level Leq—
Frequency weighting
Adjust against a known source or a calibrated meter; saved on this device.

Uncalibrated estimate: browsers cannot know your microphone sensitivity, so readings may differ from a professional sound level meter by 10 dB or more.

Reference lines: 30 quiet bedroom · 60 conversation · 85 NIOSH 8-hour limit

SAVE AND SHARE

Keep this calculator handy

Copy the link to come back any time, or print the page and choose Save as PDF to keep the current inputs and results.

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Free to use, no sign-up needed and no card required.

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How to use the Mic Test

  1. Click Allow microphone and start, then choose Allow in the browser prompt.
  2. Pick the microphone to test under Input device (headset, USB mic or built-in mic).
  3. Speak at your normal volume and watch the level bar and verdict; warnings appear for low input or clipping.
  4. Click Record 5 s and play back to hear yourself, then press Stop to release the microphone.

Why a microphone shows no sound

1) The browser or OS has not granted microphone permission. 2) The wrong system input is selected, such as a monitor’s microphone. 3) A hardware mute switch on the headset or mic is on. 4) A meeting app holds the microphone exclusively. The tool distinguishes permission denied, no device found and device busy errors and explains each fix.

Level, peak and clipping

Levels are shown in dBFS, where 0 dBFS is the digital maximum. For normal speech an RMS level between about −30 and −12 dBFS is ideal. Peaks near 0 dBFS clip and sound distorted. The noise floor is the level when you are silent; lower is better, and a high floor means room noise or a noisy mic.

Noise suppression, echo cancellation and auto gain

Browsers apply noise suppression, echo cancellation and auto gain by default, which changes how you sound. This tool asks the browser to turn them off so you see the raw signal and reports whether the browser actually did. Meeting apps usually turn them on.

Frequently asked questions

Does the mic test record or upload my voice?

No. Audio is used in browser memory to compute levels only. The 5-second recording also stays in local memory and is deleted when you refresh.

Why did the browser not ask for permission?

You may have blocked it earlier. Click the lock icon next to the address bar, set Microphone to Allow and reload. Microphones only work on HTTPS pages.

The level stays at the bottom. What now?

Check the input device and input volume in system sound settings and make sure it is not muted. Allow your browser under Windows Privacy & security → Microphone or macOS Privacy & Security → Microphone.

How do I switch between headset and built-in mic?

After permission is granted, the Input device list shows every microphone; pick one to switch. If a headset is missing, replug it and start again.

The test works but people cannot hear me in meetings

The meeting app may use a different microphone or be muted. Choose the same device in its audio settings and close this page to release the mic.

Mic Test practical guide and common questions

What does a Mic Test do?

1) The browser or OS has not granted microphone permission. 2) The wrong system input is selected, such as a monitor’s microphone. 3) A hardware mute switch on the headset or mic is on. 4) A meeting app holds the microphone exclusively. The tool distinguishes permission denied, no device found and device busy errors and explains each fix.

Who is this for, and when is it useful?

Remote workers and students whose colleagues say they cannot be heard, sound quiet or noisy, and who want to check the microphone first.

How do I use this Mic Test?

Click Allow microphone and start, then choose Allow in the browser prompt. Pick the microphone to test under Input device (headset, USB mic or built-in mic). Speak at your normal volume and watch the level bar and verdict; warnings appear for low input or clipping. Click Record 5 s and play back to hear yourself, then press Stop to release the microphone.

How should I interpret the results?

Levels are shown in dBFS, where 0 dBFS is the digital maximum. For normal speech an RMS level between about −30 and −12 dBFS is ideal. Peaks near 0 dBFS clip and sound distorted. The noise floor is the level when you are silent; lower is better, and a high floor means room noise or a noisy mic.

Where is the work performed, and which services receive data?

Mic Test: Microphone access starts only after you click and allow it; levels are computed live in the browser, nothing is uploaded, and any playback clip stays in page memory.

Microphone works? Turn speech into text

Speech to Text Online (On-Device Whisper) →

Once the microphone checks out, dictate with on-device Whisper speech to text – audio stays in the browser – and translate the text into several languages.