Microphone Check

Measure input level, device latency, and capture permissions directly in your browser.

Local processing

Live volume range

0-100%

Real-time refresh

~5 ms

Device switching

Instant

Microphone access

Awaiting request

Input device

No device selected

Live level

0%

Peak level

0%

Signal meter

Speak or clap to verify that the waveform reacts immediately.

Activity log

No microphone events yet.

Result summary

A compact view of the current test state and the strongest signal detected so far.

Ready to test

Permission

Awaiting request

Active device

No device selected

Current level

0%

Peak level

0%

Detected 0 input device(s). Start the live meter to confirm whether the selected microphone is capturing signal.

Grant access once

Browsers require explicit permission for every audio test. Approve the request and reopen the page if you dismissed it previously.

Keep levels consistent

Speak at your normal volume and watch the bar hover between 40% and 70%. If it stays low, raise system gain; if it clips, lower the boost.

Low volume or noisy microphone?

Keep a stable mouth-to-mic distance, then adjust input gain step by step. If the bar never rises, increase gain; if clipping appears, lower boost and test again on this page.

• Live input meter backed by the Web Audio API. • Device selector that lists every audio input exposed by the OS. • Permission status, peak level, and waveform preview at a glance. • Activity log that records device changes and stream errors.
• Measures RMS level up to 100% with peak tracking. • Zero-install experience; everything runs locally in your browser tab. • Works with USB, 3.5 mm, Bluetooth, and virtual microphones. • Friendly privacy notice so reviewers know nothing leaves the device.
Q: Can I record audio with this tool? A: No. Only the live level is shown. Nothing is uploaded or stored. Q: Why can't I see my USB microphone? A: Click "Refresh devices" after plugging it in, or reopen the page so the browser re-enumerates inputs. Q: I granted permission but the meter is stuck at 0%. Why? A: Make sure the correct input device is selected, and check OS-level privacy settings that may block the browser. Q: How do I diagnose noise? A: Stay silent and watch the baseline. If it sits above about 20%, lower gain or boost, or enable noise suppression in your driver. Q: Does Bluetooth latency affect the meter? A: The meter still works, but Bluetooth can add delay and aggressive processing. For calibration, prefer a wired or USB mic. Q: Is any audio sent to a server? A: No. Processing stays in your browser tab.

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