MicTest does exactly one job: it answers “is my microphone working, and how loud am I?” before a call, a stream, or a recording session — without installing anything and without your voice ever leaving the page.

What the tester measures

• Live level meter — RMS loudness on a −60…0 dB scale with a decaying peak marker, plus a plain-language hint (quiet / good / clipping).
• Oscilloscope waveform — the raw signal your mic sends, so plosives, hum, and clipping are visible as they happen. The display pauses without releasing the mic.
• Stream details — the sample rate the browser negotiated, mono/stereo channel count, the echo-cancellation / noise-suppression / auto-gain flags, and the active device name.
• Device picker — every input your OS exposes; switch mics without leaving the page.
• A 60-second local clip — record, play back, download. It’s the honest version of “how will I sound?”

Why it’s built this way

The tester deliberately runs every check in the page’s own audio graph. There’s no server-side analysis because there is no server side — the site ships as static files, so audio can’t be uploaded even in principle. That architecture choice makes the privacy story boring, which is the point. The same reasoning drives the error panels: a denied prompt, a busy device, an unplugged cable, and a muted input are different failures, so each gets its own recovery steps instead of one vague “try again”.

Who maintains it

MicTest is maintained by a small independent team that builds focused utility sites. If the tester misreads your setup — a device it labels wrong, a browser where the permission flow behaves differently, a recorder quirk — tell us with the browser and OS you’re on.