Free Audio Volume Adjuster — Boost or Normalize Audio Online

When to Adjust Audio Volume

A recording is too quiet to hear. A podcast episode is louder than the rest. A voice memo has inconsistent levels. Volume adjustment fixes these issues without re-recording.

How to Adjust Volume

1. Open the Volume Adjuster
2. Upload your audio
3. Use the slider (0.1x to 3.0x) or check Normalize for auto-leveling
4. Download the adjusted audio

Boost vs Normalize

Boost multiplies volume by a fixed amount — simple but can clip loud peaks. Normalize analyzes the entire file and adjusts to a target loudness (-1dB peak), keeping dynamics intact. Use normalize for professional results.