Microphone Test Online — Check Your Mic in the Browser
Runs 100% in your browser — your files never leave your device.
Before the interview, the recording, or the "can everyone hear me?" moment — check your microphone in ten seconds. See a live waveform of what your mic actually picks up, watch the level meter respond to your voice, confirm the right input device is selected, and get a plain-language signal quality verdict. Everything runs in your browser: no recording is uploaded, no account exists.
How it works
- 1
Start the test
Allow microphone access — the level meter should move the moment you speak.
- 2
Check the waveform and level
A healthy signal fills a good chunk of the meter when you talk and sits near zero when silent.
- 3
Switch devices if needed
Pick a different input from the device list and watch which one is actually live.
About this tool
What a healthy signal looks like
Speak at your normal volume from your normal distance. The level meter should climb past the halfway mark on loud syllables and drop close to zero when you stop. If the meter barely moves, you are too far away, the input gain is low, or the wrong device is selected. If it slams to 100% and stays there, your input is clipping — reduce the gain, because clipped audio cannot be fixed afterwards.
Reading the waveform
The waveform shows your raw signal over time. Smooth, dense waves mean a clean voice signal. Regular spiky patterns while you are silent usually mean keyboard or fan noise. A flat line while you talk means the browser is listening to a different device — pick another input from the list and watch the meter. The waveform is drawn from the raw samples your microphone delivers, so it shows exactly what a recorder would capture.
Why microphones fail browser checks
The usual suspects, in order: the operating system is sending the signal to a different input than the one you are checking; browser permission was denied earlier and remembered; a conferencing app is holding the microphone exclusively; or a USB interface changed its device name after a driver update. The device picker lets you test each input directly, which is faster than guessing in system settings.
Privacy: what this test does and does not do
The test opens your microphone and processes the signal locally, in your browser, using the standard audio APIs. There is no upload, no recording server, and no account. The optional sample recording stays in your browser memory until you download it or close the page — it exists so you can hear yourself the way a caller would.
Frequently asked questions
- Is my audio uploaded?
- No. The waveform and level are computed in your browser from the live signal. The optional sample recording stays in the page until you download it or leave.
- Why is the level meter flat when I speak?
- Almost always a device-selection mismatch: the browser is listening to a different input than the one producing sound. Try each device in the list, then check your operating system's input settings.
- Why do I sound quiet even at full volume?
- Input gain. Raise the microphone level in your system sound settings — browser pages receive the already-quiet signal. Getting closer to the mic helps more than software boosts, which add noise.
- Does this work with USB and Bluetooth microphones?
- Yes — anything the browser can see as an input. Bluetooth adds a moment of latency and often compresses the signal, so the waveform may look flatter than a wired mic.
- Can I record with this tool?
- Only the optional short sample, kept in your browser for you to download. For real recordings, use a dedicated recorder — this tool is a measurement instrument.