Free Mic Test
Mic Test shows your microphone level as RMS and peak dBFS, with a clipping light, a live waveform, a frequency spectrum and the noise floor of the last five seconds. Pick the input, switch echo cancellation, noise suppression and automatic gain on or off, and record a 5-second clip to play back. The summary is only a rough guide.
- Meter:
- RMS and peak level in dBFS
- Recording:
- 5-second clip, WebM, Ogg or MP4
- Processing:
- Echo, noise and gain toggles
- Price:
- Free
- Runs:
- Locally, in your browser
- Uploads:
- None: files never leave your device
- Account:
- Not needed
Quick answers
Is my voice uploaded anywhere?
No. The sound is analyzed and recorded inside your browser. The test clip is kept in memory and disappears when you leave, unless you download it.
What is a good microphone level?
When you speak normally, peaks between about −20 and −6 dBFS are ideal. If the CLIP light turns on, the signal is too loud and distorts; if the level stays below −40 dBFS, move closer or raise the input volume.
Processed on your device: your files are never uploaded. How it works
Network activity in this tab
What this page has requested since you opened the site in this tab. An upload is any request that sends data: POST, PUT, PATCH or a request with a body.
No uploads: nothing has been sent from this page.
No network requests yet.
To see every request, open your browser's developer tools (Network tab).
How to use the Mic Test
- Press Start microphone test and allow access when your browser asks.
- Pick the right microphone and speak normally: watch the level meter, waveform and spectrum.
- Stay quiet for a few seconds to see the noise floor, and read the summary at the top.
- Record a 5-second clip and play it back to hear how you sound.
Credits & open source
Built from scratch on web standards. Thank you to the people who make these projects.
Web platform APIs used: Media Capture (getUserMedia), Web Audio API, MediaRecorder, Canvas 2D.
Full license texts: third-party notices · all credits
Frequently asked questions
Why can't the browser see my microphone?
Check the permission icon in the address bar, your operating system's privacy settings (microphone access for the browser) and that no other app is using the device exclusively.
Should I turn noise suppression and echo cancellation on?
For calls, yes: they remove background noise and echo. Turn them off to hear the raw microphone, for example to judge a podcast or music setup.