Free Online FFT Spectrum Analyzer

Real-time audio spectrum analyzer running directly in your browser. No installation required.

Microphone not active.

What does this tool do?

This FFT spectrum analyzer captures audio from your microphone and shows the frequency content of the signal in real time. It is useful for checking tones, noise, resonances, acoustic signals and basic signal-processing concepts.

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Acies Instruments designs custom FPGA-based acquisition, signal processing and SDR systems for embedded, industrial and space applications.

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