Audio Spectrum Analyzer
Analyze audio frequency spectrum entirely in the browser. Drag-and-drop or pick an audio file, decode with Web Audio API, choose FFT size (6 presets: 256/512/1024/2048/4096/8192) and window function (4 presets: hanning/hamming/blackman/rectangular), render a real-time spectrum on Canvas, find peak frequencies, compute energy in 7 standard frequency bands (sub-bass, bass, low-mid, mid, high-mid, presence, brilliance), dBFS conversion, magnitude calculator, exponential smoothing, 4 color palette presets, text report, CSV export, history (localStorage), shareable URL, summary stats. 100% client-side.
Analyze audio frequency spectrum entirely in the browser. Drag-and-drop or pick an audio file, decode with Web Audio API, choose FFT size (6 presets: 256/512/1024/2048/4096/8192) and window function (4 presets: hanning/hamming/blackman/rectangular), render a real-time spectrum on Canvas, find peak frequencies, compute energy in 7 standard frequency bands (sub-bass, bass, low-mid, mid, high-mid, presence, brilliance), dBFS conversion, magnitude calculator, exponential smoothing, 4 color palette presets, text report, CSV export, history (localStorage), shareable URL, summary stats. 100% client-side. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.