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Audio Equalizer
Boost or cut five frequency bands on an audio file and watch the true response curve.
Shape the tone of an audio file
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Status: Choose an audio file
Band gains: 0 / 0 / 0 / 0 / 0 dB
Sample rate: —
How to use the Audio Equalizer
- Choose an audio file and press Play to hear it through the filter chain.
- Move the low, peak and high sliders to boost or cut each band.
- Watch the response curve to see the combined shape of all five bands.
Features
- Low shelf, three peaking bands and a high shelf
- Plus or minus 12 dB on every band
- Live response curve from the real filters
- Files are processed locally, never uploaded
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Frequently Asked Questions
Common questions about the free online audio equalizer.
Choose your file, press Play and move the sliders. Each slider changes a filter in the Web
Audio chain, and the curve shows the total response.
A low shelf at 120 Hz, peaking bands at 250 Hz, 1 kHz and 4 kHz, and a high shelf at 8 kHz.
That covers bass, body, presence and air.
Each band moves between minus 12 dB and plus 12 dB, which is a strong but usable range for
fixing a dull or boomy recording.
It is the combined magnitude response of all five filters, calculated from each biquad filter
response and multiplied together across the range.
This tool plays the equalized sound in the browser but does not record it. Use a screen or
audio recorder if you need to save the result.
No. The file is decoded and filtered by your own browser, and the samples never leave your
device at any point.
A low shelf boosts or cuts everything below its corner frequency, which is why it is the
usual control for adding or removing bass.
Yes. The equalizer uses standard Web Audio filters and works in any modern mobile browser,
although headphones give the best results.
Last updated: October 10, 2026