Add deep, punchy low-end to any track with this free online bass booster. Upload a song, boost the bass to taste, and export a high-quality WAV — right in your browser. Nothing is uploaded, there is no signup, and there is no watermark.
It uses a clean low-shelf boost with an adjustable hinge frequency, plus a soft-clip saturator that keeps loud, bass-heavy material from clipping on export — so you get more weight without the crackle and distortion cheap boosters add.
Bass Booster
Add punch and low-end weight to any track. Upload a song, boost the bass to taste, preview it live, then download — all in your browser, nothing uploaded.
The boost is a low-shelf filter that lifts everything below the hinge frequency — lower for subwoofer-only thump, higher for warmth and body. The saturator soft-clips the boosted lows so a loud, bass-heavy track doesn’t hard-clip on export. For clean results, aim for the smallest boost that sounds full — big lifts can overwhelm small speakers.
How to boost bass online
- Upload your track. Drop in an MP3, WAV, M4A, OGG or FLAC. It is processed on your device and never uploaded.
- Set the boost. Raise the bass boost slider. Around +6 to +9 dB adds obvious weight; go higher for a heavy, car-audio thump.
- Tune the hinge frequency. Lower it (toward 40 Hz) for subwoofer-only rumble, or raise it (toward 200 Hz) for warmth and body.
- Add saturator drive. A little drive soft-clips the boosted lows so the track stays loud and punchy without hard clipping.
- Preview and export. Press play to hear it, then click Download WAV to save the bass-boosted version.
Free, private, and no clipping
All processing happens locally with the Web Audio API, so your audio never leaves your browser. The built-in saturator and limiter keep the output clean even at big boosts — you get fuller bass, not a distorted mess. The export is a full-resolution WAV with no watermark.
Get the low end right
Bass is the hardest thing to judge on the wrong speakers. If you are mixing your own music, our guides to studio monitors and audio interfaces cover the gear that reproduces sub-bass accurately, so a boost that sounds great to you translates everywhere.
Making your own tracks from scratch? Generate original AI songs with Solmi, then bring them here to shape the low end exactly how you want it.
Frequently asked questions
How is a bass booster different from an EQ?
A bass booster is a focused, one-knob version of an EQ. It applies a low-shelf boost below a hinge frequency, plus saturation to stay clean. A full EQ lets you shape many bands, but for “make the bass bigger” a booster is faster and harder to get wrong.
Will boosting bass distort my song?
Not with this tool. The soft-clip saturator and limiter round off peaks instead of letting them clip, so even large boosts stay smooth. If you drive it very hard you will hear gentle saturation, which is usually musical on bass.
Does this upload my audio to a server?
No. Everything runs locally in your browser using the Web Audio API. Your file is never uploaded.
What is the best amount of bass boost?
Start around +6 dB and trust your ears. Smaller boosts that still sound full translate better across speakers and headphones; very large boosts can overwhelm laptop speakers and earbuds.
Can I boost bass for my car or headphones?
Yes. For car subwoofers, lower the hinge frequency for deep thump. For headphones, a moderate boost with a slightly higher hinge adds warmth without muddiness.
What audio formats are supported?
Any format your browser can decode — MP3, WAV, M4A/AAC, OGG and FLAC. The export is always a WAV.
Does it work on mobile?
Yes, it runs in mobile browsers. Large files process faster on a laptop or desktop.
Is this tool really free?
Completely — no signup, no watermark and no export limit.