About Mic Tester
Mic Tester is a free, browser-based tool that lets you check whether your microphone is working in a few seconds — no software to install, no account to create, and nothing ever recorded or uploaded.
Why this tool exists
Before a call, a recording session, or a livestream, it's useful to confirm your microphone is actually working and picking up sound at a reasonable level. Digging through operating system sound settings or joining a test call just to check a mic is slower than it needs to be. Mic Tester gives you a live, visual answer in one click.
How it works
Mic Tester uses your browser's built-in Web Audio API to read your microphone's input level directly on your device. The audio never leaves your browser, is never recorded to a file, and is never sent to any server — the level meter is calculated and displayed entirely locally.
Who built it
Mic Tester is an independently built and maintained tool, created to be a fast, no-friction way to test a microphone online. It's supported by advertising, which helps keep the tool free to use with no sign-up required.