Adjust Audio Volume
Boost, lower, or auto-normalize loudness to a consistent level - batch process up to 20 files locally in your browser.
Volume adjustment
Automatically brings audio to a consistent, broadcast-standard loudness level (EBU R128) - good for uneven recordings or preparing audio for podcasts/video.
Drag & drop files, or browse
Up to 20 audio files at once
How it works
Choose a mode
Auto-normalize, or set a manual gain percentage.
Upload audio files
Drop up to 20 files at once.
Download the result
Individually, or as a ZIP bundle.
Manual gain applies FFmpeg's volume filter, scaling the audio signal by the percentage you choose. Normalize uses the loudnorm filter, which measures perceived loudness and dynamically adjusts gain to reach a consistent target level - both run through FFmpeg compiled to WebAssembly, directly in your browser.
Frequently asked questions
4 questionsIt analyzes the loudness of your audio and automatically adjusts gain to bring it to a consistent, broadcast-standard level (EBU R128) - useful for recordings with inconsistent volume, or preparing audio to match other tracks.