Real-Time Audio Filter & EQ for Producers
FILTER is a browser-based frequency filter and equalizer that lets you shape the tone of any audio loop in real-time. Upload a WAV, MP3, or FLAC, choose a filter type: lowpass, highpass, bandpass, notch, or parametric peak. Hear the result instantly while watching the frequency spectrum update live.
The spectrum analyzer shows the full 20 Hz – 20 kHz range on a logarithmic scale so you can see exactly where the energy sits before and after filtering. Sweep the frequency knob to find problem frequencies, boost with the peak EQ, or carve space for other elements in your mix. Export the processed audio as a WAV when you're done.
Everything runs locally in your browser using the Web Audio API — no server processing, no uploads, no latency.
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