At a glance
- Cost
- 100% free, no account
- Volume change
- From −12 dB quieter to +24 dB louder
- Distortion guard
- Look-ahead peak limiter
- Quick fix
- Normalize to −1 dBFS in one click
- Saves
- MP3 or WAV
- Privacy
- Stays on your device
Boosting the volume
- Load the quiet file. Its current peak level is measured immediately.
- Choose the change. Drag the slider (−12 to +24 dB), or tap Normalize to −1 dB for the loudest clean result.
- Keep the limiter enabled so boosted peaks don't crackle.
- Apply and download as MP3 or WAV.
Understanding decibels
Loudness works on a logarithmic scale, so the numbers can be counter-intuitive:
- +3 dB: a slight but audible lift.
- +6 dB: the signal is twice as strong, clearly louder.
- +10 dB: roughly twice as loud to most listeners.
- +20 dB: ten times the signal, for very faint recordings.
Normalize, boost, or limit?
Normalize raises the entire file by the same amount until the single highest peak touches −1 dBFS. The dynamics are untouched, so it's the most transparent option.
Boost beyond that and some peaks would exceed the digital ceiling. Without protection they'd be chopped flat ("clipping"), which sounds like crackling. The built-in look-ahead limiter sees those peaks 5 ms in advance and gently reduces the gain just for those moments, letting everything else get louder.
Keep in mind that amplification raises everything, including background hiss. If the recording has long silent stretches at either end, remove them first with the Audio Trimmer.
Common questions
How much louder can I make a file?
Up to +24 dB. With the limiter on, even large boosts stay free of clipping distortion.
What does "normalize to −1 dB" do?
It sets the loudest moment in the file to just below the maximum, making the whole recording as loud as possible without altering its dynamics.
Can I make audio quieter as well?
Yes. Values below zero reduce the level by up to 12 dB.
Does my file get uploaded?
No. The gain and limiter are applied in your browser.