Volume Booster & Normalizer
Adjust volume and normalize peaks. Export MP3 or WAV.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
How to use Volume Booster & Normalizer
- Add a recording and trim it if needed.
- Choose peak normalization or manual gain. Set a ceiling and optionally remove DC offset.
- Prepare the preview, compare levels and download MP3 or WAV.
What are the limits of Volume Booster & Normalizer?
Browser-supported MP3, WAV, M4A, AAC, OGG, FLAC and WebM inputs; mono or stereo only. One file up to 20 MB and two minutes of source audio. Output is limited to two minutes. Processing stays local at 44.1 kHz in a cancellable worker. WAV is 16-bit PCM. MP3 re-encoding is lossy, can add frame padding and may use a lower sample rate at low bitrates. Export metadata is not preserved. The encoder reduces gain when necessary to prevent sample clipping. Peak normalization uses a shared gain across channels and preserves dynamics. It is not LUFS loudness matching, compression, noise removal or clipped-audio repair. Manual gain is capped at the selected sample-peak ceiling. DC offset correction subtracts each selected channel’s mean; it does not remove hum. Gain can increase existing background noise. Silent input remains silent. Reported PCM peaks are measured before export fades and lossy MP3 encoding; true peaks can differ.