Add more low end to a song or recording, with the clipping kept in check, in your browser
Processed in your browser. Nothing is uploaded. Checked against sources on 22 Oct 2026.Bass Booster opens with the bass preset already set: up to 6 dB more below 250 Hz, where the kick drum, the bass guitar and the body of a voice live. Press Play to hear it against the original, push the 31 and 63 Hz sliders further if you want more, and download it. A boost that would clip is lowered just enough to fit, and the page says by how much. Nothing is uploaded.
Drop your files or click to choose them.
Adjust the options and check the preview.
Download the result. Nothing was uploaded.
An equalizer turns some frequencies up and others down. A song that sounds thin on laptop speakers needs more bass; a voice recorded next to traffic needs less rumble; a podcast that sounds muffled needs a little presence around 2 to 4 kHz.
Presets. Bass boost, Bass cut, Treble boost, Treble cut, Vocal, Loudness and Podcast voice set all ten sliders at once. Start from one and adjust.
No clipping. Boosting can push peaks past full scale, which sounds like crackle. If that would happen, the saved file is lowered as a whole just enough to peak at −0.3 dBFS, and the page tells you by how many dB.
The rest of the article, and all 6 questions about Audio Equalizer, are on the Audio Equalizer page.
Drop the song on Audio Equalizer and press the Bass boost preset, which raises everything below 250 Hz by up to 6 dB. Press Play to compare it with the original, raise the 31 and 63 Hz sliders for more, then press Equalize and Download. A boost that would clip is lowered automatically.
Low rumble from traffic, wind or air conditioning sits below about 125 Hz, so the Bass cut or Podcast voice preset removes most of it. Mains hum at 50 or 60 Hz is a narrow tone; the 63 Hz band reduces it, though a dedicated notch filter would remove it more precisely than an octave-wide band.
Playback is turned down by the largest boost so the preview never distorts. Without that, a 9 dB bass boost would crackle on loud passages and make the comparison about volume instead of tone. The saved file is only lowered if it would actually clip, by as little as needed.
No. The file is decoded by your browser and every filter runs inside this page on your own device, so nothing is sent to a server and nothing is kept. Closing the tab removes the decoded audio from memory. No account or app is needed.
Rates and rules change; check the source before you rely on a figure.
Still stuck? Ask about Audio Equalizer and anybody who knows can answer. No account needed.
Same job, other tools: Frequency Generator – Generate a steady test frequency for speakers, headphones or instruments · Sweep Tone Generator – Sweep smoothly between two frequencies over a time you choose · Audio Sweep Generator – Play a slow logarithmic sweep and hear every rattle in the room · Headphone Frequency Test – Hear where your headphones stop, by ear rather than by chart.
On the related tools: Mic Test – See your voice on a live waveform and hear it played straight back.