DecibelCheckerBrowser Audio Tools
Free • Private • No installation

Online Decibel Meter

Check the estimated sound level around you using your device microphone. Everything is processed locally in your browser.

Microphone access is required. Audio is analyzed on your device and is not uploaded.
ReadyEstimated sound level
--dBQuiet
20406080100120
Minimum--
Average--
Maximum--
Elapsed00:00
Live history

Sound Level Over Time

Current -- dB

Browser microphones are not calibrated sound-level meters. Readings are estimates and can vary by device, microphone processing and calibration.

01

How to use the decibel checker

Tap Start Measuring, allow microphone access, keep the microphone uncovered and watch the live reading. Use the calibration offset if you can compare the device against a known sound-level meter.

02

What the meter shows

The live panel tracks the current estimate plus minimum, average, maximum and peak levels. The chart keeps a short history so sudden changes are easier to spot.

03

Private by design

The microphone stream stays in the browser. DecibelChecker does not record, store or send your audio to a server.

Audio lab

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FAQ

Frequently asked questions

Is this a real decibel meter?

It is a browser-based estimator. A calibrated SPL meter is required for certified or compliance measurements.

Why do readings differ between phones?

Microphones, automatic gain control and operating-system audio processing differ between devices. Calibration can reduce, but not remove, those differences.

Does the site record my microphone?

No. The tools process the live stream locally and do not upload or save audio.