Free Online Audio Equalizer — 10-Band EQ, Bass Boost & Waveform Visualizer
10-Band Equalizer, Bass Boost & Spectrum Visualizer. Real-time audio spectrum visualizer with 5-band / 10-band equalizer, bass boost, vocal presets, and playback speed.
What is Audio EQ and what does it do?
The 10-Band EQ & Waveform Visualizer is a free online audio equalizer that lets you boost bass, tune individual frequencies, apply genre presets, and watch a real-time spectrum visualizer — supporting MP3, WAV, FLAC, OGG, M4A, AAC, and OPUS files.
All sound processing happens live through the WebAudio API in your browser, so your music files are never uploaded while you shape their sound.
- Adjust 5-band or 10-band equalizer sliders from 60Hz bass to 14kHz highs.
- Apply one-tap presets: Bass Boost, Vocal Clarity, Rock, Electronic, Classical, and Flat.
- Visualize audio with an animated real-time frequency spectrum.
- Change playback speed for practice or transcription.
- Process MP3, WAV, FLAC, OGG, M4A, AAC, and OPUS audio files.
How does Audio EQ work?
Your audio file is decoded into raw PCM samples by the browser, then routed through a WebAudio graph of BiquadFilter nodes — one per EQ band — each boosting or cutting its assigned frequency range.
A GainNode pair handles the bass boost and master volume, while an AnalyserNode computes the FFT data that drives the live spectrum animation. A peak limiter at the end of the chain prevents clipping, and all of it runs on-device in real time.
100% private: all processing happens locally in your browser using client-side WebAssembly, WebCrypto, WebAudio, and HTML5 Canvas. Your files are never uploaded to any server.
Who needs Audio EQ?
Music lovers
Boost weak bass or tame harsh treble on any song without installing desktop EQ software.
Podcasters & audio editors
Preview how a voice track sounds with different EQ settings before final production.
Musicians & students
Isolate frequency ranges to study instruments, and use playback speed control for practice.
Anyone with quiet tracks
Lift quiet vocals with the Vocal Clarity preset or push bass for a party playlist.
Supported file formats
10-Band EQ & Waveform Visualizer opens and processes the following file extensions directly in your browser:
.mp3.wav.flac.ogg.m4a.aacHow to use Audio EQ — step by step
- 1
Choose Audio Track
Drop any audio file (.mp3, .wav, .flac, .m4a, .aac, .ogg).
- 2
Adjust Frequency Sliders
Tweak 60Hz bass, 1kHz vocals, and 14kHz highs or pick a genre preset.
- 3
Enjoy Live Visualizer
Watch real-time animated frequency waveforms dancing to your beats.
Frequently asked questions
Does this equalizer work on all audio formats?
Yes, it supports MP3, WAV, FLAC, AAC, M4A, OGG, and OPUS audio tracks.
What presets are included?
Bass Boost, Vocal Clarity, Rock, Electronic, Classical, Flat, and Custom EQ profiles.
Does it distort the sound when boosting bass?
No, an integrated WebAudio peak limiter prevents clipping and maintains crystal-clear audio fidelity.
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