Does the Voice Recorder upload audio to a server?

No. Recording, level metering, and conversions run locally in your browser.

Is the sound level shown in dB SPL?

Browsers typically expose digital amplitude levels (dBFS) and do not provide a calibrated dB SPL meter without device-specific calibration.

What downloads are supported?

You can download your recording in the browser-supported recording format (WebM/OGG) and also export a WAV. Imported audio files can be converted to WAV and normalized to a target peak.

Voice Recorder

Record audio, measure levels in real-time, and export WAV instantly.

Live Levels

RMS and Peak are shown in dBFS (digital scale).

Standby

RMS Level

—dBFS

Smoothed over time

Peak Level

—dBFS

No clipping

Estimated SPL

—dB

Requires calibration offset

Level History (Last ~10s)

Recording

Listen, download or export WAV.

Not recording

Quick Tips

For raw levels, disable AGC/noise suppression if possible.

Use calibration offset only with a reference meter.

Export WAV for best compatibility in editors.

Settings

Microphone —

Reduce Noise & Echo

Enable for clearer voice recording. Disable for raw measurement.

Smoothing 0.85

Higher values reduce jitter but respond slower.

Peak Hold 1.0s

Calibration Offset (for SPL) +0 dB

Estimated SPL = RMS dBFS + offset.

Auto-export on changes

Update downloads while running.

Clipboard

Drop an audio file here

WAV, MP3, M4A, OGG (browser supported)

Audio File Converter

Convert to WAV, normalize to a target peak, and export a level report.

Open File

Preview & Levels

No file loaded.

Overall RMS

—dBFS

Whole file average

Overall Peak

—dBFS

No clipping

Sample Rate

—Hz

Decoded buffer rate

Convert

Auto-convert on changes

Rebuild downloads when settings change.

Target Peak -1.0 dBFS

No converted file yet.

Everything runs locally in your browser.

Understanding dBFS vs dB SPL

Your browser provides digital microphone amplitude, which maps to dBFS (decibels relative to full scale). dB SPL requires calibration and device-specific microphone sensitivity.

Best practices for clean recordings

Use a quiet environment and a consistent mic distance.
Disable automatic gain control if you need consistent levels.
Export WAV for editing workflows.