About
About Us
Clean Mic Test is a small, focused tool with one job: tell you quickly and honestly whether your microphone works, and let you hear how it sounds.
Why we built it
A mic problem always shows up at the worst moment: two minutes before a job interview, at the start of a raid, or when a teacher asks you to unmute. Most of the microphone checks we tried either showed a bouncing bar without letting you hear yourself, or buried the test under pop-ups and sign-up prompts. We wanted something that opens instantly, looks clean on a phone or a laptop, and gives a clear answer in seconds.
How it works
The whole test runs inside your browser using standard web technology that every modern browser already includes:
- Microphone access comes from the browser’s built-in permission prompt (
getUserMedia). You decide whether to allow it, and you can revoke it at any time. - The live waveform and level meter are drawn with the Web Audio API, which measures your signal dozens of times per second on your own device.
- The 5-second recording uses the browser’s MediaRecorder. The clip lives in memory, plays back once, and is thrown away when you leave.
Because of this design, we never receive your audio. There is no server that could store it, so there is nothing to leak.
What we care about
- Privacy. Your voice stays on your device. See our Privacy Policy for the details.
- Speed. The site is static, cached worldwide and works on slow connections.
- Clarity. Plain-language results and step-by-step fixes when something is wrong.
- Free access. The tool is free for everyone. We may show ads to cover running costs, and they will never get in the way of the test itself.
Get in touch
Found a bug, have a device that doesn’t work, or want to suggest a feature? We read every message. Visit the contact page or email hello@cleanmictest.com.