Spectral Cipher

Hide an image inside audio. The picture lives in the frequency spectrum — visible only through spectrogram analysis. Like Aphex Twin, but with encryption.

How Spectral Cipher works

Spectrogram steganography. Your image is converted to grayscale and mapped onto audio frequencies. Each pixel column becomes a time slice, brightness controls amplitude at that frequency. The result sounds like eerie noise but reveals the image when frequency-analyzed.

Optional AES encryption. When you set a password, the image data is AES-256-GCM encrypted before spectral encoding. Without the password, the spectrogram shows random noise instead of the image. Everything runs in your browser.