Volume Booster makes quiet recordings, voice memos and songs louder, without the harsh distortion of simply turning the volume up. Choose how much louder (or quieter) and save as MP3, WAV, M4A, FLAC or OGG. Everything runs in your browser, so the file is never uploaded.
How to make audio louder
- Choose an audio file or a video.
- Pick an option under Volume.
- Click Change volume. The status line shows how many dB were added. Listen to it and download.
The options
| Option | What it does | Good for |
|---|---|---|
| As loud as possible without distortion | Raises everything until the loudest moment reaches −1 dB | Most files; safe default |
| Louder (+3 dB) | A small, clear step up | Slightly quiet podcasts |
| Much louder (+6 dB) | About twice the level | Quiet voice memos and meetings |
| Very loud (+10 dB) | About twice as loud to the ear | Very quiet recordings |
| Maximum (+15 dB) | The largest boost | Whispered or distant speech |
| Quieter (−6 dB), Much quieter (−12 dB) | Lowers the level | Ringtones, loud music, background tracks |
How it avoids distortion
Turning audio up normally clips the loudest moments: the top of the wave is cut flat, which sounds harsh and crackly. Here, everything up to −1 dB is raised exactly; above that, peaks are rounded off softly instead of cut. Speech and most music stay clean even at +10 dB, because peaks are short.
The first option goes further: it measures the loudest moment and raises everything just enough for that moment to reach −1 dB, so nothing at all is rounded off. If the file is already at that level, it says so and leaves it unchanged.
Tips
- Noise gets louder too. A boost raises hiss and hum along with the voice. For noisy recordings, use Noise Reduction first; it can also make the voice louder in the same step.
- Music and big boosts: +10 and +15 dB flatten loud passages. For music, +3 or +6 dB usually sounds better.
- One loud spot: if a single clap or bump limits the first option, cut it with the Audio Cutter, then boost again.
- Lossless while editing: save as WAV or FLAC if you will process the file further.
Private by design
Your files are processed on your own device and never uploaded. See how it works.