dBmeter
Decibel meter
Browser sound tools for measurement and analysis
Select a tool. Set the controls. Read the result. No installation or account is required. Audio stays on your device.
- Free to use
- Runs on this device
- No account
Accuracy limits
Estimate current, average, and peak sound level from your microphone with an adjustable calibration offset.
Accuracy limitsDecibel meter
Microphone audio is analyzed on this device and is never uploaded.
Calibration offset
Accuracy limits: Browser microphones are not calibrated sound-level meters. Use the readings for comparison and training only. Do not use them for legal, medical, or compliance decisions.
Sound tools
Sound tools
Measure, analyze, and generate sound with eight free browser tools. Use the decibel meter, frequency analyzer, tone generator, BPM tapper, metronome, pitch detector, waveform generator, and noise dose calculator.
Decibel meter
Estimate current, average, and peak sound level from your microphone with an adjustable calibration offset.
OpenFrequency analyzer
View a live logarithmic spectrum and find the strongest frequency in microphone audio.
OpenTone generator
Play sine, square, triangle, or sawtooth reference tones from 20 Hz to 20 kHz.
OpenBPM tapper
Tap along with music to calculate tempo, beat length, and tapping stability.
OpenMetronome
Practice with an accurate browser click, adjustable tempo, time signature, and first-beat accent.
OpenPitch detector
Detect the nearest musical note, frequency, cents offset, and confidence from your microphone.
OpenWaveform generator
See how wave shape, frequency, amplitude, and phase change a synthetic waveform.
OpenNoise exposure calculator
Estimate daily occupational noise dose using NIOSH or OSHA exchange-rate formulas.
Open