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Frequency Analyzer

Upload an audio file for real-time frequency analysis. Your files never leave your browser — all processing happens locally. No signup, no install, completely free.

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How to Use This Frequency Analyzer

This free online frequency analyzer lets you inspect the spectral content of any audio file directly in your browser. No downloads, no sign-ups required.

🔒 Your audio stays private. All processing happens entirely in your browser using the Web Audio API. Your files are never uploaded to any server. Buchert Audio does not collect, store, or access your audio in any way.

What Is a Frequency Analyzer?

A frequency analyzer (also called a spectrum analyzer) uses Fast Fourier Transform (FFT) to break an audio signal into its component frequencies. It shows you the amplitude of each frequency band, making it easy to identify resonances, imbalances, and problem areas in a mix. Audio engineers use frequency analyzers during mixing, mastering, and sound design to make more informed EQ decisions.

Understanding the Frequency Bands