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Too boomy, too harsh, too thin? Open a track, pull ten sliders from 31 Hz to 16 kHz while it plays, and watch the response curve change as you hear the difference. Export the result when it sounds right; the audio stays on your device the whole time.
Processing locally on your device
Overview
A graphic equalizer splits the audible range into fixed bands and lets you raise or lower each one. This one uses the ten standard octave centers, 31, 62, 125, 250 and 500 Hz and 1, 2, 4, 8 and 16 kHz, each with a range of ±12 dB in half-decibel steps. Every band is a peaking filter one octave wide (Q ≈ 1.41), so neighboring bands overlap smoothly instead of leaving gaps or sharp steps between them.
The curve above the sliders isn’t an approximation. It is calculated from the browser’s own filters with the Web Audio getFrequencyResponse method, so it shows exactly what the ten filters do together, including how adjacent boosts add up. The same filter chain plays the live preview and renders the export, which means the file you download sounds exactly like what you heard while adjusting.
Boosting any band raises peak levels, and a recording that already peaks near 0 dBFS will clip. Auto headroom lowers the output by the highest point of the curve: if your settings boost 125 Hz by 6 dB, the whole track drops by 6 dB before the limiter, so nothing distorts. The limiter catches anything left above −2 dB, and an output gain control lets you set the final level by hand if you prefer.
As a rule of thumb, 60–250 Hz controls warmth and weight, 250–500 Hz is where mud and boxiness live, 2–5 kHz adds presence and clarity to voices, and 8–16 kHz adds air and sparkle. Cutting usually sounds more natural than boosting, so try lowering a problem area before raising everything else.
| Band | Character | Typical move |
|---|---|---|
| 31–62 Hz | Sub-bass rumble you feel more than hear | Cut for voice, small boost for EDM |
| 125–250 Hz | Warmth, body, boominess | Cut 2–4 dB if muddy |
| 500 Hz–1 kHz | Boxy or nasal tone | Small cuts clean up thin mics |
| 2–4 kHz | Presence, speech clarity, harshness | Boost for voice, cut if harsh |
| 8–16 kHz | Air, sparkle, hiss | Lift for dull tracks, cut for noisy ones |
Drop in an audio file, or a video to equalize its soundtrack.
Press Preview and pick a preset such as Vocal, Podcast or Bass boost.
Fine-tune the ten band sliders while the audio plays; double-click a slider to reset it.
Leave Auto headroom and the limiter on to avoid clipping, or set the output gain yourself.
Choose MP3, M4A, WAV, FLAC, OGG or Opus and export.
Use cases
The Podcast preset cuts low rumble and boominess under 125 Hz and lifts the 2–4 kHz presence range, which makes speech easier to follow on phone speakers and in cars.
Older masters and some streaming rips sound muffled. A gentle lift at 8–16 kHz restores air, while a small cut around 2–4 kHz tames recordings that sound harsh on earbuds.
When clips recorded on different devices sit side by side, a few dB of EQ on each brings their tone closer together, so the cuts are less jarring.
Laptop and phone speakers can’t reproduce deep bass. The Small speakers preset trims the lowest bands and boosts 125–250 Hz so the low end is still heard.
Pro tips
Answers to common questions about the equalizer.
A graphic EQ has fixed bands at set frequencies, here ten octave-spaced ones, and you only choose how much to boost or cut each. A parametric EQ also lets you move each band’s frequency and width. Graphic EQs are quicker for broad tonal shaping, which is what most music and voice fixes need.
That’s Auto headroom at work. Boosting raises peaks, so the tool lowers the overall level by the curve’s highest boost to keep the loudest parts from clipping. Turn it off and use the limiter or output gain if you want a louder result.
Yes. It is calculated from the same Web Audio filters that process the sound, using getFrequencyResponse at 256 points between 20 Hz and 20 kHz, so overlapping bands are shown exactly as they combine.
The EQ itself is processed in 32-bit floating point. WAV and FLAC exports are lossless; MP3, M4A, OGG and Opus are lossy, so pick a higher bitrate such as 256 or 320 kbps for music you plan to keep.
You can load a video and the tool equalizes its soundtrack, but it exports audio only. To put the new sound back, replace the audio track in a video editor.
No. ToolEnhancer processes files on your own device inside the browser. They are never sent to, stored on or seen by our servers.
Yes. The equalizer is free to use with no sign-up, no watermarks and no daily limits.