Microphone Tester
Test any microphone in your browser: live level meter, real-time waveform, mono/stereo channel check, clipping detection, and a record-and-playback round-trip.
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What is Microphone Tester?
Microphone Tester opens your mic with getUserMedia and measures it live: an RMS input level meter, a real-time waveform, channel count, sample rate, and clipping detection at 98% full scale. Record a short clip and play it back for a true end-to-end round-trip - all processed locally, nothing uploaded.
Key Benefits
- Verify your mic works before meetings, streams, and recordings
- Clipping detection catches distortion that plain volume bars hide
- Channel and sample-rate readouts settle mono vs stereo confusion
- Playback round-trip proves the whole capture chain, drivers included
- Fully local processing - audio never leaves your device
Common Use Cases
- •Checking a headset or USB mic before an interview or stream
- •Diagnosing why teammates say you are too quiet or distorted
- •Setting a consistent input level across different microphones
- •Verifying a new audio driver or OS update did not break capture
How to Test Your Microphone
- Start and allow access: Click the start button and allow microphone permission when the browser asks.
- Speak and watch the meter: Talk at your normal volume: the level meter should move, the waveform should follow, and the clipping flag should stay off.
- Record a round-trip: Record a short clip and play it back to hear exactly what meeting apps and listeners would capture.
Key Features
- Live RMS input level meter with a percentage readout
- Real-time waveform drawn from raw sample data
- Clipping detection at 98% full scale with a warning flag
- Channel count check for mono vs stereo (L/R) setups
- Sample rate display for the active audio session
- Record and play back a clip - a true capture round-trip, fully local
Frequently Asked Questions
Is my audio uploaded anywhere?
No. The mic stream is processed by your browser with the Web Audio API and never leaves your device. Recordings live in memory until you close the page.
What does the clipping warning mean?
Your input hit 98% of full scale, which usually sounds distorted. Lower the mic gain or move farther from the microphone until the flag stays off.
Why does my stereo mic show as one channel?
Many headsets and USB mics report a single mono channel even with two capsules. The channel readout shows what the driver actually delivers, which is what apps will receive.
The browser blocked the microphone - what now?
Allow mic permission for this site in the address-bar icon or browser settings, then start the test again. The tester reports exactly which error occurred.