Audio Volume Booster
Increase, decrease, or normalize the volume level of audio files.
How it works
Each audio sample is multiplied by your chosen gain in the browser. Normalize ignores the slider and instead finds the loudest peak, then scales the whole track so that peak sits just below the clipping ceiling — the safest way to make quiet audio louder. Manual boosts above 100% can clip if the audio is already loud; the tool hard-limits samples to avoid harsh distortion. Output is WAV.