Signal
Free browser microphone test with live level meter and playback
About Signal
Signal is a free online microphone test for anyone who wants to confirm their mic is working before a call, recording or stream. It is aimed at people troubleshooting audio on a laptop, headset or external microphone who need a quick answer without installing software.
You choose an input device, start the test and watch a live signal meter that shows quiet, strong and clipping levels in digital decibels. A short 10 second recording lets you play back what the microphone captured, so you can hear yourself as others would. The page also includes troubleshooting notes for common problems such as blocked browser permissions and missing devices.
What sets it apart is privacy: according to the site, the signal and recording stay in the browser tab, with no account and no upload. Optional aggregate statistics are off unless you opt in, and they only send a single page-view event.
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