Bass boost onlineBeta
Bass booster online
Give a song more low end without the distortion. Pick how much and where, add warmth for small speakers, and download it clean.
- Free
- No sign-up
- Runs in your browser
- Nothing is uploaded
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How it works
- 01
Drop a song
MP3, WAV, FLAC, M4A, OGG or a video with sound, up to 8 minutes. It stays in your browser.
- 02
Shape the bass
We start at plus 6 dB at 60 Hz. Choose the boost, the frequency and the warmth while it plays.
- 03
Download it
Save a WAV that keeps the loudness of the original and never clips.
Where the bass lives
Bass is not one thing. Around 30 to 50 Hz is the sub, the rumble you feel in a club more than you hear. Around 60 to 80 Hz is the body of a kick drum and the weight of an 808. Around 100 to 150 Hz is the punch, the part of the bass you notice on a laptop.
That is why the frequency slider matters. Plus 6 dB at 40 Hz makes a hip hop track shake a car; the same boost at 120 Hz makes a rock song feel fuller on earbuds. We start at 60 Hz, the middle of most kick drums and bass lines.
The boost is a smooth bell shape around the frequency you pick, so it lifts a whole region rather than one narrow note, and a filter below 20 Hz keeps out rumble no speaker can play.
Why boosted bass usually distorts, and how we avoid it
Every digital file has a ceiling. Boosting the bass adds energy, and a song that was already mastered close to that ceiling goes over it. The tops of the waves get cut flat, which is the crackle you hear on cheap bass boosted videos.
We do two things. First we measure the loudness of your song and bring the boosted version back to the same loudness, so the bass rises against the rest of the mix instead of everything getting louder. Then a true-peak limiter, the one inside OBRA Mastering, holds every peak under minus one decibel.
The result is more bass at the same volume, without distortion, which is also what a mixing engineer would do.
Warmth: bass you can hear on a phone
Phone speakers and small earbuds cannot move enough air to play 50 Hz. Boost it and nothing happens, except that the limiter has more to hold.
The warmth slider gently saturates the bass on its own and adds back only the harmonics, at two and three times the frequency. Your ear hears those overtones and fills in the fundamental, a well known effect of hearing. The bass seems to appear on speakers that cannot actually play it.
Keep warmth low for clean, modern mixes and raise it for lo-fi, hip hop or anything meant for phones. At zero, the booster is a pure equaliser.
What you get
- Bass boost from 0 to 18 dB, in half decibel steps
- Pick the frequency, from 30 Hz sub to 150 Hz punch
- Warmth: gentle harmonics of the bass that small speakers can play
- A true-peak limiter, so the boosted song never clips
- Loudness kept the same as the original, so you hear more bass, not just more volume
- Live preview and an A/B with the original
Bass boost done three ways
| OBRA bass booster | A phone or player EQ | Typical upload bass boosters | |
|---|---|---|---|
| Clipping | Never, a limiter holds the peaks | Can distort at high settings | Often clips when pushed |
| Frequency | Your choice, 30 to 150 Hz | Fixed bands | Usually fixed |
| Small speakers | Warmth adds harmonics they can play | Boost they cannot reproduce | Rarely |
| A file to share | WAV | No, only on that device | Often MP3 |
| Upload | None | None | Required |
Many bass boosters simply turn the low end up until the file clips, which sounds loud for a second and distorted after. Matching the loudness lets your ears judge the bass itself.
Frequently asked questions
How do I bass boost a song?
Drop the song. It starts at plus 6 dB at 60 Hz. Change the boost, the frequency and the warmth while it plays, then download the WAV.
How much bass boost is too much?
Most songs sound good with 3 to 8 dB. Beyond 10 dB the bass starts to cover the vocal. Use the A/B button to compare with the original.
Will bass boosting damage my speakers?
Not at normal volume. Our file is held under minus one decibel true peak and keeps the original loudness, but very high bass at high volume can strain any small speaker.
What frequency should I boost?
40 to 60 Hz for sub and 808s, 60 to 90 Hz for kick drums, 100 to 150 Hz for punch on laptops and earbuds.
Why doesn't the boosted song get louder?
On purpose. We keep the loudness of the original so you hear more bass, not more volume, and so it never clips.
Is the song uploaded?
No. It is boosted and saved in your browser, nothing is sent anywhere.
Can I bass boost a video?
You can drop a video file and we use its sound. The download is the audio as a WAV.
More free music tools
- Beta8D audio converterTurn a song into 8D audio that circles around your head on headphones.
- BetaSlowed and reverb makerTurn a song into a slowed and reverb version: slower, lower and wrapped in a long dark reverb.
- BetaNightcore makerMake a nightcore or sped up version of a song: faster, higher, brighter.
- BetaBPM finderFind the BPM of any song, with half and double time and a click to check it.
- BetaVocal removerRemove the vocals from a song and keep the instrumental.
Finish the track
Learn more, or get a person on it
Read the mastering guides, comparisons and data, or send your tracks to an engineer with OBRA ULTRA.
Happy with the result?
Master it on OBRA Audio Mastering: three masters measured in LUFS, free to listen, in your browser.