Drop in a track and reshape its tone by hand. This is a fully parametric equalizer that runs entirely in your browser, working like the EQ in a DAW: six color-coded, numbered bands sit on top of a live spectrum analyzer, so you can see the energy in your audio and the curve you are drawing at the same time. Boost the warmth, tame a harsh edge, lift the vocals, or open up the air, then download the equalized file or send it straight to another tool. Nothing is uploaded for processing; all of the filtering happens locally with the Web Audio API.

How to use it

  1. Drag and drop an audio or video file, or click the drop zone to browse (MP3, WAV, OGG, FLAC, M4A, WebM, and MP4 are all accepted, up to 200 MB and 45 minutes). You can also record straight from your microphone.
  2. The transport bar sits at the top: Play/Pause (the spacebar works too), Stop to jump back to the beginning, and Loop to restart playback automatically when the track ends. Pausing keeps your position; pressing play again continues from where you left off. You can also click anywhere on the waveform at the bottom to play from that spot.
  3. The equalizer curve appears over a frequency grid that runs from the low bass on the left to the high treble on the right, with six numbered, color-coded dots on it. Drag any dot up to boost that range or down to cut it, and left or right to change which frequency it targets. As you drag, the curve and the sound update in real time.
  4. Under the graph sits a row of six knobs, matched to the dots by color and number. Turn a knob (drag it up or down, or scroll over it) to sharpen or widen its band: narrow for a surgical notch, wide for a gentle, musical shape. The knobs stay in place no matter where you move the dots.
  5. The Prevent clipping (max 0 dB) checkbox keeps the output from distorting: leave it on and big boosts are transparently scaled back so the file never exceeds 0 dB; untick it if you want the raw, louder result even if it clips.
  6. Use the preset menu in the top corner of the graph (Flat, Bass Boost, Treble Boost, Vocal, Loudness) as a quick starting point — pick Flat to reset everything. It switches to "Custom" as soon as you shape the curve yourself.
  7. Choose WAV or MP3 and click Download, or click Open with… to send the equalized audio straight into another tool such as the Stem Splitter, Audio Trimmer, or SongFinder.

What each band does (default positions)

  • Band 1 (~60 Hz): the bass weight — rumble, kick, and body.
  • Band 2 (~240 Hz): warmth and boom; cut here to clean up a muddy mix.
  • Band 3 (~750 Hz): the body of vocals and instruments.
  • Band 4 (~2.2 kHz): presence and clarity; small boosts help vocals cut through.
  • Band 5 (~6 kHz): bite and definition; cut to soften harsh sibilance.
  • Band 6 (~14 kHz): air and sparkle at the very top.

FAQ

Is my file uploaded anywhere? No. The equalizer runs entirely in your browser using the Web Audio API. Your audio never leaves your device, and the export is rendered locally.

What is a parametric EQ? Instead of fixed sliders, a parametric EQ lets you choose where each band sits (its frequency), how much you boost or cut (its gain), and how wide its effect is (its Q). That gives you precise control over exactly the part of the sound you want to change.

What does the "Prevent clipping" option do? Boosting bands adds energy, and a loud track plus a big boost can push the signal past 0 dB, which distorts (clips) in the exported file. With the box ticked, the tool measures the processed peak and transparently lowers the overall level just enough to stay under 0 dB. Untick it to keep the raw level — louder, but flattened wherever it exceeds 0 dB.

Does the download include my changes? Yes. When you export, the same six-band filter is applied to the entire file at full quality and rendered to a new WAV or MP3.

Why does playback obey my phone's mute switch? To apply the EQ in real time, playback is routed through the Web Audio engine, which on iOS follows the hardware mute switch. Turn the switch off to hear the preview. The exported file is unaffected.

What sample rate and format do I get back? WAV exports are 16-bit at your file's original sample rate. MP3 exports are encoded at 192 kbps.