Bass Booster Online

Add bass boost to a song and compare it live with the original.

Your files are processed on your device and are never uploaded.

Add deep, punchy bass to any song. Pick a level – Light, Medium, Heavy or Extreme – or set the boost and the top frequency yourself, and compare the boosted version live with the original. A built-in limiter keeps the extra bass from clipping and crackling.

How to Boost Bass

Choose a song – MP3, WAV, M4A or a video's soundtrack.
Pick a bass level, or adjust Boost (how much) and Bass up to (which frequencies) yourself.
Listen and compare with the original.
Lower the output volume if the sound feels squashed, then download.

Choosing the Right Level

Light: A gentle warmth for laptop and phone speakers, which have little bass of their own.
Medium: Fuller sound for headphones and car stereos.
Heavy: Strong bass for hip-hop, EDM and party music.
Extreme: The full "bass boosted" effect – use it for fun edits and memes rather than everyday listening.

Where the Bass Lives

Sub-bass sits around 30–60 Hz – you feel it more than you hear it, and small speakers cannot play it. Punch and kick drums sit around 60–120 Hz. Raising Bass up to to 150–200 Hz adds warmth to bass guitars and voices, but too much can make songs sound muddy. For small speakers, boost a little higher; for subwoofers, keep it low.

Why the Output Volume Control Is There

Bass carries a lot of energy, so boosting it uses up the space before digital clipping. The limiter catches the peaks, but heavy limiting can flatten the music. Turning the output volume down a little leaves room for the bass and keeps the drums punchy.

Free and Private

Everything runs in your browser. Your songs stay on your device and you get unlimited downloads with no watermark. For more control over every frequency, use the Audio Equalizer.

Audio Equalizer Volume Booster Add Reverb to Audio Normalize Audio Audio Converter

Frequently Asked Questions

How do I make a song bass boosted?

Choose the song, select Heavy or Extreme, check the result against the original and download it.

Why does the boosted song sound distorted?

There is too much bass for the available headroom. Pick a lower level or turn down the output volume – the limiter then has less work to do.

Why can't I hear the bass on my phone?

Phone and laptop speakers cannot play very low notes. Raise Bass up to to about 150 Hz, or listen with headphones.

Can I boost bass in a video?

Yes. Choose a video file and its sound is boosted. Use Combine Video with Audio to put the new sound back on the video.

Is it free?

Yes – no sign-up, no watermark and no upload.

Is Bass Booster free to use?

Yes. Bass Booster is completely free, with no sign-up, no watermark and no limit on how many times you use it.

Are my files uploaded to a server?

No. Your files are processed directly in your web browser on your own device. Nothing is uploaded or stored, and the file is gone from memory when you close the tab.

More Audio Tools

Cut Audio Merge Audio Audio Looper Reverse Audio Remove Silence Volume Booster Speed & Pitch Audio Equalizer Add Reverb to Audio Add Echo to Audio Normalize Audio Audio Converter