Audio Equalizer — Adjust Bass, Mids and Treble, Online Free
Low, mid and high shelves with ±15 dB per band — the honest three-knob EQ.
Drop an audio file, or click to browse
MP3, WAV, M4A, OGG, FLAC, and more
Processed locally — your file never leaves this tab
00:00.00 / 00:00.00
Adjust — fades, volume, speed, reverse
Precise times
Three knobs cover most of what an EQ is for: lows below 150 Hz, mids around 1 kHz where voices live, and highs above 3 kHz. This equalizer uses real filter bands — low shelf, peaking, high shelf — with ±15 dB each, so you can thin out boom, pull muddiness down or add air. Drop a file, shape the sound, export. Everything runs in your browser: the file is never uploaded.
What the three bands do
- Cut mud: −3 to −6 dB in the mids cleans up crowded voice recordings.
- Tame boom: pull the low band down on recordings made near a wall.
- Add presence: lift highs for air, lows for weight — both at once if the mix needs it.
How to use the Audio Equalizer
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Drop your audio
Any MP3, WAV, M4A, OGG or FLAC file. Processing stays on your device.
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Shape the three bands
Low below 150 Hz, mid around 1 kHz, highs above 3 kHz — ±15 dB each. Small cuts beat big boosts.
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A/B and export
Reset a band to 0 dB to compare with the original, then export as MP3 or lossless WAV.
Three bands, cut or boost
The equalizer is a low shelf at 150 Hz, a peak at 1 kHz, and a high shelf at 3 kHz. Each band runs about ±15 dB. A band left at 0 dB is bypassed, so it does not color the sound.
Cutting is the safer move. A −4 dB cut in a muddy band often does more than a +6 dB boost somewhere else. Big boosts push the signal toward the limiter and can soften peaks.
What each band is for
The three bands are the usual split, not a surgical EQ:
- 150 Hz: weight and mud. Cut if the file is boomy. The bass booster only lifts this region, up to +15 dB, and cannot cut.
- 1 kHz: presence. Cutting the mids makes voices sound distant.
- 3 kHz: air and edge. The treble booster only lifts above this point.
When a single booster is enough
If you already know you only want more bass or more treble, the bass booster and the treble booster are the shorter pages. They do not cut.
A low-pass or high-pass filter is a cutoff sweep, not these shelves. Use a filter when you want everything above or below a frequency gone, not a few decibels moved.
Audio Equalizer FAQ
Is my audio uploaded?
No. The bands are Web Audio filters (low shelf, peaking, high shelf) inside your browser tab — there is no upload step. You can go offline after the page loads and the tool keeps working.
Is boosting or cutting better?
Cutting. Big boosts push the signal toward the limiter and can soften peaks; a −4 dB cut in the muddy band often achieves more than a +6 dB boost anywhere.
How is this different from the bass and treble boosters?
The boosters are single-purpose shelves with boost-only ranges. The equalizer gives you all three bands with cut and boost in one place — use the boosters when you know exactly which end you need.
What are the exact band frequencies?
Low shelf at 150 Hz, peaking at 1 kHz (unit width), high shelf at 3 kHz — the standard three-band layout. Bands at 0 dB are bypassed, so an untouched band never colors the sound.
Why do voices get strange when I cut the mids?
Speech intelligibility lives around 1 kHz. Cut the mid band gently (−3 to −6 dB) and listen to a sentence you know well — deep mid cuts make voices sound distant or hollow.
Does it work on a phone?
Yes. The editor is built for touch — drag to select, set the sliders, export. Works in current Chrome, Edge, Firefox and Safari, on desktop and mobile.
Related tools
Bass Booster
A real low-shelf EQ: up to +15 dB below 150 Hz, preview and export — nothing leaves your device.
Open Bass Booster
Treble Booster
A real high-shelf EQ: up to +15 dB above 3 kHz, preview and export — nothing leaves your device.
Low Pass Filter
Sweep the cutoff from 20 kHz down to 300 Hz and keep only the frequencies you want.