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Audio Spectrogram Viewer

Render a STFT spectrogram PNG from PCM WAV.

This tool processes selected files in your browser.

Accepted: audio/wav, .wav. Desktop cap 250 MiB per file.

FFT size

Hop fraction

Frequency scale

Floor dB

Palette

How it works

Processing stays in this browser tab. Source files are not uploaded. Export is a new copy; originals are not overwritten.