What does the spectrogram actually show?

Frequency content over time — typically time on one axis, frequency on the other, and color or brightness representing how much energy is present at each frequency.

Can I use this to identify a specific problem frequency, like hum?

Yes, a spectrogram makes a consistent unwanted frequency (like 50/60Hz electrical hum) visually obvious as a steady horizontal line.

Does it work on music as well as speech?

Yes, it works on any audio — spectrograms are commonly used for both music analysis and speech/noise diagnosis.

Does Audio Spectrum Visualizer upload my files to a server?

No. Audio Spectrum Visualizer runs entirely in your browser using on-device processing, your files never leave your device.

Audio Spectrum Visualizer

Generate a frequency spectrogram image from an audio file.

Runs in your browser

Drop an audio file here

Choose File

About this tool

A waveform shows you volume over time, but not which frequencies are actually present — that's what a spectrogram shows, revealing the frequency content of a sound visually, which is useful for audio analysis, spotting unwanted frequencies, or just seeing a track's frequency character at a glance. This tool generates a frequency spectrogram image from an audio file, turning its frequency content into a visual you can inspect or share.

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