Audio & Video
Spectrogram Generator
Visualize audio frequencies over time.
Load an audio file for a full labeled spectrogram, or use your microphone for a live view.
This free spectrogram generator visualizes how the frequencies in a sound change over time. Drop in an audio file and it renders a complete, labeled spectrogram of the whole track — with a time axis, a frequency axis (linear or logarithmic) and a dB color legend — or use your microphone for a live scrolling view. Choose the FFT size for more time or frequency detail, pick from scientific color maps (Viridis, Magma, Inferno, Heat, Grayscale), and set the dB floor to bring out quiet detail. Download the result as a PNG. All analysis uses the Web Audio API.