Audio Equalizer Online Free — 10-Band Real-Time EQ
A professional-grade 10-band audio equalizer with real-time preview, spectrum analyzer, and 14 genre presets. Adjust frequencies, apply high/low-pass filters, compare with A/B bypass — all processing happens in your browser with zero uploads.
Shape your sound with a professional 10-band equalizer, spectrum analyzer, and instant preview
Features
How to Use the Equalizer
- Upload your audio. Drop an MP3, WAV, FLAC, OGG or any audio file onto the upload area.
- Choose a preset or adjust manually. Select from 14 genre presets or drag the 10 band sliders to create a custom EQ curve.
- Preview in real-time. Press play to hear the EQ applied instantly. Use A/B toggle to compare with the original.
- Save and download. Choose your output format, click Save, and download the processed file.
Frequently Asked Questions
What does an equalizer do?
An equalizer adjusts the volume of different frequency ranges. Bass boost increases lows (32-250 Hz) for deeper sound, treble boost enhances highs (4-16 kHz) for clarity, and vocal enhance focuses on midrange where human speech lives (500 Hz - 4 kHz).
Can I hear changes in real-time?
Yes! All EQ adjustments are applied instantly via Web Audio API. Move any slider and hear the difference immediately. Use the A/B bypass button to toggle between the original and equalized audio.
What are the high-pass and low-pass filters?
A high-pass filter removes frequencies below its cutoff (e.g., 80 Hz removes rumble and hum). A low-pass filter removes frequencies above its cutoff (e.g., 12 kHz removes hiss). Both are essential for cleaning up audio.
Will EQ reduce audio quality?
Minimal impact. Boosting frequencies can increase noise slightly, but the built-in limiter prevents clipping. For lossless output, choose WAV or FLAC format.
What is the spectrum analyzer showing?
The spectrum analyzer displays the frequency content of your audio in real-time using FFT (Fast Fourier Transform). The curve overlay shows your EQ settings — how much each frequency is boosted or cut.
Is my audio uploaded to a server?
No. All processing happens entirely in your browser using Web Audio API. Your files never leave your device.
