Bass Booster Online — Boost the Bass of Any MP3 Free

Every boost runs through a limiter that holds the peaks just under the maximum, so the low end stays clean instead of clipping into a crackle. Extreme levels on already-loud tracks can still sound muddy on small speakers — start with light or moderate.

Adding bass raises the loudest peaks, so the limiter pulls the overall level down a touch to keep the track clip-safe. That is normal — turn your playback up, or run it through the volume booster afterwards.

You pick the band: Sub lifts the deep rumble around 60 Hz, Bass lifts the standard low end around 110 Hz, and Punch lifts the kick and upper bass around 160 Hz. Everything above stays untouched.

Yes, but tiny speakers cannot reproduce deep sub-bass. On earbuds and phones pick the Punch band and a light or moderate level for the most audible result; save Sub and the heavy levels for headphones, car systems and subwoofers.

This tool only adds bass. To cut it instead, use the equalizer, which can lower the low end as well as lift the treble and shape the rest of the tone.

At normal listening volumes, no. Deep bass takes more power, so an extreme boost played very loud on small or old speakers works them harder — keep the volume sensible and there is nothing to worry about.

Yes. Add up to 10 files, pick one level and band and boost them all in one go — then download each result, or grab the whole playlist together as a ZIP.

Your file is processed on our own servers and deleted automatically, and nobody else sees it. The download link is unguessable and is never listed or shared anywhere.