Bass Booster Online
Add weight and depth to any audio file with a one-click low-shelf boost — pick +3 to +12 dB, preview, and download, all in your browser. No sign-up, and your file is never uploaded.
How to Boost Bass Online
No account, no upload — three steps on your own device.
Drop Your Audio
MP3, WAV, M4A, FLAC, OGG, or AAC up to 200 MB. It decodes right in the browser and draws the waveform.
Pick a Boost
Tap +3, +6, +9, or +12 dB. Start lower for tracks that are already bass-heavy, higher for thin phone recordings.
Preview & Download
Hit Boost Bass, listen to the result, and download it as an MP3 at the bitrate you choose — no queue, no watermark.
Why Notevibes Bass Booster
A calibrated low-shelf — not a blunt volume knob on the low-end.
Four Boost Presets
+3, +6, +9, or +12 dB with one tap. A low shelf at 100 Hz adds weight while your vocals and mids stay clear.
Preview Before You Save
Boost, listen to the result, then download — or bump the dB and try again. Nothing renders to a file until you like it.
Never Uploaded
The boost runs entirely in your browser. Your file never leaves your device — there is nothing to delete because nothing was sent.
Any Audio Format
MP3, WAV, M4A, FLAC, OGG, and AAC up to 200 MB — anything your browser can decode will load.
MP3 Your Way
Download the deeper file as an MP3 at any bitrate from 64 to 320 kbps — no watermark, no ads, no attribution.
Free, Anywhere
No sign-up, no daily limits. Works on phones, tablets, and laptops in any modern browser.
Nothing to Upload, Nothing to Leak
The bass boost runs on your own device. Your file never touches a server — which is a stronger promise than any “we delete it later”.
No Upload
Processing runs on your device
No Account
Start boosting immediately
Works Offline
Once the page loads, no connection needed
What People Boost
One tap for every “this needs more low-end” moment.
Car Audio Prep
Add low-end for car stereos with weak bass response
Tinny Phone Recordings
Put back the low-end a phone mic never captured
Laptop & Bluetooth Speakers
Compensate for small speakers that lose the bass
Podcast Voice Depth
Add chest and warmth to thin voiceovers
Weak Sub in a Mix
Push the sub on hip-hop and EDM tracks that feel light
Old or Compressed Files
Restore body to low-bitrate rips and streams
Deeper Bass Without Touching an EQ
Some audio just sounds thin — a phone recording with no bottom, a track that vanishes on laptop speakers, a voice that has no chest to it. The usual advice is to install an audio workstation and learn what a shelf filter is. This booster skips all of that: drop the file, tap a dB amount, listen, download. Most files process in about a second, because they never leave your device.
One tap that maps to real weight
Under the hood it’s a low-shelf filter at 100 Hz — the region where sub-bass and low-bass live, below where most vocals and instruments sit. Lift it +3 dB for a gentle nudge, +6 dB to roughly double the perceived low-end, or +9 to +12 dB to rescue something genuinely thin. It’s the same low-shelf that powers the Notevibes audio editor, running through your browser’s built-in audio engine.
Make a bass boosted version of any song
The classic “bass boosted” edit — the kind that fills YouTube and car-audio playlists — is exactly what this makes: drop in a song or MP3 and download the bass boosted version a few seconds later. People search for a bass boosted generator or a bass boosted maker, and this is that, minus the ads and the upload wait. Because the boost is a low shelf at 100 Hz, it increases the bass without touching the rest of the mix — vocals, snares, and hi-hats come through exactly as they were, just sitting on top of a much heavier bottom.
Preview, then commit
Boost is never a blind bet. Apply an amount and you get a preview to play against the original — too boomy, drop to +3; not enough, jump to +9 and render again. Only when it sounds right do you download, so you never end up with a file that’s overcooked.
Free, private, and instant
Because the processing happens on your device, there’s nothing for us to meter or store: no upload, no queue, no watermark, no sign-up, files up to 200 MB. Preview as many times as you like and download the moment the low-end feels right.
When bass isn’t the whole story
If the top end also sounds dull, the treble booster adds air the same one-tap way, and the full audio equalizer shapes every band at once. If a track has muddy sub-rumble underneath the bass, a high-pass filter tightens it up. And when the file needs cuts, mixing, or AI cleanup on top of tone, open it in the online audio editor.
Need to Do More Than Boost Bass?
The full Notevibes editor trims, mixes, cleans up, and applies AI tools to your audio — then exports to MP3 or WAV.
Free to try · No credit card required
Related Audio Tools
More free AI audio tools from Notevibes — same engine, no sign-up.
Treble Booster
Brighten dull recordings with a high-shelf boost.
Audio Equalizer
Shape your sound with a multi-band browser EQ.
Audio Volume Booster
Increase volume by +3 to +12 dB.
Low-Pass Filter
Cut high-frequency hiss and harshness above a cutoff.
Audio Limiter
Brick-wall limit peaks without distortion.
Stereo Widener
Widen the stereo image for a bigger sound.
Bass Booster FAQ
How does the bass booster work?
It applies a low-shelf filter at 100 Hz — every frequency below the shelf is lifted by your chosen amount (+3, +6, +9, or +12 dB). The shelf rolls off smoothly so the mids stay clear and only the low-end gets weightier.
How do I add bass to an MP3?
Drop the MP3 onto the booster, pick how much to increase the bass — +3 dB for a subtle lift, +12 dB for heavy — then preview and download the bass boosted MP3. The boost is a low shelf at 100 Hz, so vocals and highs stay untouched.
What does the dB value control?
The dB value is how much louder the bass becomes. +6 dB roughly doubles the perceived bass energy. +12 dB is heavy — great for tinny phone recordings or laptop speakers, but it can sound boomy on already bass-heavy music.
Will it muddy my mix?
Not much. The shelf is centered at 100 Hz, which mostly affects sub-bass and low-bass — below where vocals and most instruments live. For already bass-heavy tracks, start with +3 dB.
Is my audio file uploaded to a server?
No. The bass booster runs entirely in your browser using the Web Audio API. Your file never leaves your device — nothing is uploaded, stored, or analyzed.
What format is the download?
The boosted file downloads as an MP3, and you pick the bitrate — from 64 up to 320 kbps, with 192 kbps as the default. It plays everywhere: phones, car stereos, editing software.
Does it work on mobile?
Yes — Chrome, Firefox, Safari, and Edge on both desktop and mobile. Longer files render faster on a laptop simply because the processor is faster, but the tool is the same.