Test your microphone privately — nothing is uploaded or recorded until you press record.

Processing and the mic’s real settings

Browsers clean up the sound by default, so the meter above shows processed sound. Turn these off to see the raw mic. They apply when you start.

Listen through headphones

Hear your mic live. Wear headphones: with speakers the sound loops back into the mic and howls. It is off until you switch it on, and it cuts itself if it hears feedback.

Noise and speech check

Five seconds of silence, then five seconds of you talking. You get a plain verdict on background noise, voice level and, for a stereo mic, a dead or unbalanced channel.

Start the mic test first.
How the verdict is decided
  • All levels are dBFS (0 is the loudest the mic can send). Background is the average level while you are quiet; your voice is the level of the loudest tenth of the readings.
  • Background noise: high above -40 dB, moderate above -50 dB.
  • Voice: quiet below -35 dB, very loud above -14 dB, not heard below -60 dB.
  • Gap between voice and background: poor under 15 dB, clean at 30 dB or more.
  • Channels (stereo mics only): dead if one is under -70 dB while the other is above -50 dB; unbalanced if they differ by 6 dB or more.
  • Muffled: energy from 4 to 8 kHz more than 40 dB below the voice band (300 to 3400 Hz).
  • Noise suppression and auto gain change these numbers. Turn them off above to measure the raw mic.

Recording test

A 3-2-1 countdown, then it records and stops by itself. Play it back to hear what others hear. Nothing leaves your device.

Start the mic test first.

  • 100% Free
  • No Sign-Up
  • No Credit Card
  • No Free Trial
  • No Pro Tier
  • No Watermarks

Nothing is uploaded. Just open it and start.

Test your microphone online

Free, no sign-up, no download. Check that your microphone works before a call, recording, or stream: read its level in dB with a clip light, see the settings your browser really applied, run a noise and speech check, spot mains hum on the spectrum, and record a clip to hear yourself back. It all runs in your browser, and nothing is uploaded.

Real numbers

Level and peak in dBFS, a clip light and count, and a green, amber and red bar.

Processing switches

Turn echo cancellation, noise suppression and auto gain off and see the settings the mic really got.

Recording test

A 3-2-1 countdown, auto-stop, WAV download and an A/B clip with processing off.

Noise, speech and spectrum

A plain verdict on your room and voice, mains hum detection and a live frequency view.

Live monitor

Hear yourself through headphones, with the delay shown and a feedback cutoff.

Private and client-side

No account, no upload. Everything happens on your own device.

Related tools

Voice Recorder

Record voice or mic audio with a dB meter, saved takes, crash recovery, silence trim, loudness levelling and MP3/WAV export. Nothing uploaded.

Instrument Tuner

Free online tuner for guitar, bass, ukulele, violin and voice. Needle or strobe, reference tones, capo and A4 400-480. Nothing is uploaded.

Tone Generator

Exact-frequency tone generator with sweeps, left/right and binaural tones, noise, WAV download, share links and a careful hearing check.

Sound Text Transfer

Send text, links, Wi-Fi details or a contact between two devices using only sound, with error checking. No pairing, no network, nothing uploaded.

Frequently asked questions

Is my microphone audio sent anywhere?
No. The test runs entirely in your browser. The meter, spectrum and checks never leave your device, and recorded clips are kept in memory until you download them or leave the page. Your choices (which mic, the three switches, clip length) are saved in this browser only.
Why does it ask for microphone permission?
Browsers require your explicit permission before any page can use a microphone. Where the browser supports it, this page shows the current permission status before you start. The prompt appears when you press Start, and you can change it any time from the icon in your address bar.
My mic isn't working. What should I check?
Each error has its own message with steps for your system (Windows, macOS, iPhone, Android or Linux). The usual causes: the right input is not selected in the Microphone list, the browser or the operating system blocks the mic, or another app or call is holding it. If the mic is unplugged while testing, the page says so, and a newly plugged-in mic appears in the list.
What do the dB numbers and the green, amber and red bar mean?
Levels are in dBFS: 0 dB is the loudest the mic can send, and quieter sounds are negative. The bar is grey under -30 dB, green up to -9 dB, amber from -9 dB and red from -3 dB or after a clip; under -50 dB the verdict says no sound was detected. The thin line is the peak hold, and the clip light and count register samples at or above 99% of full scale. A clipped recording sounds distorted and cannot be repaired afterwards, so lower the input gain until the bar stays out of red.
What do echo cancellation, noise suppression and auto gain change?
Browsers apply all three by default, so the meter normally shows processed sound. Switch them off to see the raw mic. The page then lists what the browser actually applied (sample rate, channels, latency and each switch), because some browsers ignore a request. Changing a switch restarts the microphone.
How does the recording test work, and what is the A/B clip?
Pick a length (5 to 30 seconds), press Record test clip, and after a 3-2-1 countdown it records and stops by itself. You can play it back and download it as WAV, or in the format your browser recorded. After a first clip, Record again with processing off makes a second clip from a separate mic stream with echo cancellation, noise suppression and auto gain off, so you can compare the two by ear. If your browser keeps processing on for that stream, the clip says so.
How does the noise and speech check decide?
You stay quiet for five seconds, then talk for five. Background noise above -40 dB is called high (moderate above -50 dB); a voice under -35 dB is quiet, over -14 dB very loud; a gap of less than 15 dB between voice and background is poor. For a stereo mic it also flags a dead channel (under -70 dB while the other is above -50 dB) or channels more than 6 dB apart. Most microphones are mono, and then there is no channel check. The exact thresholds are listed under the result.
Can I hear myself live?
Yes, with the Listen through headphones switch. It is off until you turn it on, never starts by itself, and fades in and out. It shows an estimated delay. Use headphones: through speakers the sound feeds back into the mic. The page watches for the howl of feedback (one loud, narrow tone that stays on the same pitch while its level holds or climbs) and switches the monitor off if it hears it. Speech and singing should not trigger it.
What does the spectrum show, and how is mains hum found?
The Spectrum view plots the mic's frequency content from 20 Hz to 20 kHz. Mains hum shows as narrow spikes at 50 Hz (or 60 Hz) and multiples of it; the page reports it when the 50 or 60 Hz fundamental and at least one multiple stand clearly above their surroundings and nothing else nearby is as strong, so a steady low tone is not mistaken for hum. A muffled mic shows almost nothing above 4 kHz. The analysis runs on your device.
Which browsers and devices work?
Any modern browser with microphone support: Chrome, Edge, Firefox and Safari, on a device with a mic. The page must be served over HTTPS, which this site is. The permission status line, the latency figure and some of the settings readout depend on what your browser reports; Firefox and Safari report less.

Spotted a bug or have a suggestion?

Found something broken, have an idea, or just want to say thanks about any of our tools? Every message reaches a real person.