Change Audio Volume
Boost or reduce an audio file’s volume with a simple percentage slider, or normalize it so the loudest part hits full scale. Everything runs in your browser.
How to change audio volume
- Drop in your audio file.
- Drag the volume slider (100% is unchanged), or tick Normalize to maximise it without clipping.
- Choose MP3 or WAV and download the result.
About changing volume
Changing volume multiplies every audio sample by a gain factor — 200% doubles the amplitude, 50% halves it. Boosting too far can clip (distort) the loudest peaks, so the tool clamps samples to the valid range to keep things clean.
Normalize is the safer way to get maximum loudness: it finds the single loudest sample and scales the whole file so that peak sits at full scale, raising the level as much as possible without distortion. All processing is done locally and nothing is uploaded.
Frequently asked questions
How do I make audio louder?
Set the slider above 100% — for example 150% or 200%. To get the most loudness without distortion, use Normalize instead, which scales to the peak automatically.
What does Normalize do?
It scales the whole file so the loudest sample reaches full volume, giving the maximum level possible without clipping. It overrides the percentage slider.
Will boosting the volume distort it?
Very large boosts on already-loud audio can clip the peaks. Normalize avoids this; if you boost manually and hear distortion, lower the percentage.
Is my audio uploaded?
No. Volume changes happen entirely in your browser, so your file never leaves your device.