Sound & Decibel Meter
Estimate relative sound level from your microphone.
Relative sound level
0 dB
Relative dB is calculated locally from RMS microphone amplitude; it is not a calibrated SPL measurement.
About this tool
Estimate relative sound level from the microphone with an honest calibration disclaimer. Free, private and browser-based. Sound & Decibel Meter runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- Sound & Decibel Meter is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use Sound & Decibel Meter?
Open Sound & Decibel Meter, enter or paste your input, and copy the result. The page works without an account.
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