How does this differ from the volume normalizer?

The normalizer targets a specific level (for example -3 dBFS peak). This tool just adds or subtracts a fixed dB amount without measuring first.

What does 6 dB mean perceptually?

Roughly a doubling or halving of loudness. 3 dB is a noticeable change; 10 dB feels like twice as loud to most listeners.

If the source already has peaks above -24 dBFS, yes — anything above 0 dBFS clips. The clip warning flags this before you render.

Change the loudness of an audio file by a specific number of decibels. Use +6 dB to roughly double perceived volume, or -6 dB to halve it.

Drop an MP3 or WAV file here

or click to browse

Your audio never leaves your browser. The gain adjustment runs locally via the Web Audio API.