Online equalizer
Load an audio file and shape it with the same six bands the iPhone app uses, plus a bass shelf and gain. Everything runs in your browser — the file is decoded locally and never uploaded anywhere.
Start at a low level and raise it gradually — sustained test tones are more fatiguing than music at the same volume.
MP3, WAV, M4A, FLAC, OGG — whatever your browser can decode. Nothing leaves your device.
Cut before you boost
The instinct with an equalizer is to raise what you want more of. The better habit is to lower what is in the way. Every decibel of boost eats headroom and brings clipping closer; cutting costs nothing.
The most useful single move on most material is a couple of decibels out of 400 Hz. It does not make the bass louder — it makes it separate, and separation is what the ear reads as tight, defined bass.
Your output decides which bands matter
A laptop or phone speaker cannot reproduce much below a few hundred hertz, so moving the 60 Hz slider there does nothing except waste headroom. On headphones it does a great deal. Before concluding a band is broken, check where your hardware actually stops with the bass test.
Why there is no download button
This is a playback tool. Exporting a processed file would mean shipping an audio encoder into the page — a large download for every visitor, most of whom want to hear whether an adjustment helps rather than to render a new file.
If you want these settings applied permanently to your own listening, that is what Volume Booster does on iPhone: the same six bands and bass shelf, applied to your library as you play it. And if you want to understand what each band is doing before you touch it, the EQ guide has real starting numbers.
Make your music louder than ever.
Boost the volume, add deep bass, and fine-tune every track with a 6-band equalizer — all in one simple app.
Download the App