Some recordings sound thin: a voice memo with no warmth, a track that feels flat on small speakers, a beat that lacks punch. Adding weight to the low frequencies fixes that, and it does not take a studio. The bass booster lifts the low end in your browser with two simple sliders.
The short version: load the file, raise the bass, set how far up the boost reaches, and export.
How do I boost the bass?
Add your file and raise the bass slider. As you do, the low frequencies get louder and the track gains weight. A second slider sets how high up that boost reaches into the low-mid range.
- Add a file. Drop in an MP3, WAV, OGG or M4A to see its waveform.
- Dial in the bass. Raise the boost slider for more low end, and set the reach.
- Export. Preview the boosted track, then save it as MP3 or WAV.
What the two sliders do
- Boost is how much louder the low end gets, in decibels. A few decibels adds warmth; more gives a real thump. This is the main control.
- Reach is how high up the boost extends. Keep it low, near the bottom, for tight, deep bass only. Raise it and more of the low-mid range warms up too, which thickens a thin voice but can muddy a busy mix.
For most jobs, a moderate boost with a low-to-medium reach gives punch without losing clarity.
Avoiding distortion
The catch with boosting bass is that it makes the loudest moments louder, and pushing too far can clip and distort, especially on tracks that already have heavy bass. The preview is your guide: if the boosted version sounds harsh or rattly, ease the boost slider back. Smaller, cleaner boosts almost always sound better than a maxed-out one.
If you have boosted hard and the overall level is now too hot, run the result through change volume and normalize to bring it back under control without losing the low-end weight.
Cutting bass instead
The slider also goes the other way. Pull it below zero to reduce the low end, which is the cure for boomy room recordings, microphone rumble, or a track that sounds muddy. Same idea, opposite direction.
A note on quality
Boosting bass shapes the sound rather than degrading it. The only quality question is the export format: WAV stays lossless, MP3 re-encodes at a high bitrate with a minimal, usually inaudible change. Choose WAV if the track is heading into more editing.
Why it stays on your device
The boost runs on your own machine. Your file is read locally, processed in the browser, and saved back to your computer, with nothing uploaded, no watermark and no account. A long track processes as easily as a short clip.
When the low end has the weight you want, open the bass booster and export.