Spectrum Analyzer
Free online audio spectrum analyzer. Visualize frequency spectrum using FFT, analyze audio in real-time, view waveform and frequency bars. Supports all audio formats.
About Spectrum Analyzer
This online spectrum analyzer visualizes the frequency content of your audio files in real-time using FFT (Fast Fourier Transform). See which frequencies are present in your audio, analyze music structure, check audio quality, and understand the frequency distribution. Perfect for audio engineers, musicians, and anyone interested in audio analysis.
What audio formats are supported?
All common audio formats are supported including MP3, WAV, OGG, AAC, M4A, FLAC, OPUS, and more.
What is a spectrum analyzer?
A spectrum analyzer shows which frequencies are present in audio at any given time. It uses FFT (Fast Fourier Transform) to break down the audio signal into its frequency components. Low frequencies appear on the left, high frequencies on the right. Height shows the amplitude (strength) of each frequency.
What are the different visualization types?
Frequency Spectrum: Shows all frequencies as a smooth curve. Waveform: Shows the actual audio waveform over time. Frequency Bars: Shows frequencies as colorful bars, great for music visualization.
What does smoothing do?
Smoothing controls how much the visualization is averaged over time. Higher smoothing (0.8-0.9) creates smoother, less jumpy visuals. Lower smoothing (0.0-0.3) responds faster to changes but may look more erratic.
What can I use this for?
Analyzing audio quality and frequency balance, checking for clipping or distortion, understanding music structure and instrumentation, identifying problematic frequencies, comparing different audio files, learning about audio frequencies, and educational purposes.
What is FFT?
FFT (Fast Fourier Transform) is an algorithm that converts audio from the time domain (amplitude over time) to the frequency domain (which frequencies are present). It's the mathematical basis for spectrum analysis.
What is the file size limit?
The maximum file size is 50MB for smooth processing in your browser.
Is my audio file safe?
Absolutely! All audio analysis happens directly in your browser using Web Audio API and Meyda. Your audio file is never uploaded to any server.