Check mic quality, volume levels, frequency response, clipping, and latency in real time — directly in your browser. No downloads, no sign-up.
Everything you need to diagnose and evaluate your microphone's performance
Real-time oscilloscope view of your mic input showing signal shape, amplitude, and any distortion or noise patterns.
See the full frequency response of your microphone from 20Hz to 20kHz with per-band level visualization.
Industry-standard VU meter with Peak and RMS level readouts in dBFS, plus a segmented bar display.
Automatically measures your microphone's background noise floor during silent moments to calculate estimated SNR.
Instant visual alert and count when your microphone signal exceeds 0 dBFS, helping prevent distorted recordings.
An intelligent quality rating (Excellent / Good / Fair / Poor) based on noise floor, dynamic range, and clipping behavior.
Measure the audio round-trip latency of your microphone and system to identify timing issues in recordings.
Record a short audio clip directly from your mic, play it back immediately, and download as WAV — right in the browser.
Four quick steps to complete mic diagnostics in your browser
Choose your microphone from the device dropdown. Supports built-in mics, USB headsets, and audio interfaces.
Click "Start Mic Test" and allow browser microphone permission when prompted. Your audio never leaves your device.
Speak into your microphone. Watch the live waveform, spectrum, VU meter, noise floor, and quality score update in real time.
Check your Mic Quality Score, clipping alerts, and SNR estimate. Record a test clip and play it back to verify audio quality.
Testing your microphone online is one of the fastest ways to confirm whether your mic is working correctly before a call, podcast, video recording, or live stream. An online microphone tester uses your browser's Web Audio API to capture live audio from your selected input device and provide instant diagnostic feedback — all without installing any software.
A faulty or misconfigured microphone can ruin a job interview, business meeting, or content creation session. Common microphone problems include low volume output, excessive background noise, clipping on loud sounds, frequency response coloration, and high-latency delay. Our free online mic test helps you identify all of these issues in seconds.
Our tool measures Peak Level (the loudest momentary signal), RMS Level (the average perceived loudness), Noise Floor (the ambient noise when you're silent), and Dynamic Range (the difference between the quietest and loudest signals your mic can capture). These four metrics together define your microphone's performance characteristics.
Excellent (85–100): Low noise floor, wide dynamic range, no clipping. Ideal for professional recording. Good (65–84): Suitable for calls, podcasts, and voiceovers with minor noise. Fair (45–64): Noticeable background noise or limited dynamic range — consider a quiet recording environment. Poor (below 45): Significant issues detected; check connections, drivers, and mic placement.
Test in the environment where you'll actually record. Position the mic 6–12 inches from your mouth at a 45-degree angle to reduce plosives. Use a directional (cardioid) pattern to reject room noise, and ensure your gain staging gives peaks around –12 to –6 dBFS for optimal headroom.
100+ free tools for audio, video, SEO, AI, development, and more — all in one place, no sign-up required.