Hide text in audio
Tuck a message into a recording's samples
Least-significant-bit steganography writes your text into the lowest bit of each audio sample, where it changes the sound too little to hear. Hide a short note in a clip, or drop in a WAV to reveal a message someone hid this way. It stays a normal audio file you can play anywhere.
Runs entirely in your browser. Your file is never uploaded or stored.
Decoding audio…
How hiding text in audio works
Digital sound is a long list of numbers, samples, each one the height of the waveform at that instant. The lowest bit of each number is the quietest possible detail, far below anything the ear picks out, so flipping it is inaudible. This tool decodes your clip to raw samples and writes your message one bit at a time into those lowest bits, then saves the result. To read it back, the reveal tab walks the same samples and reassembles the bits into text.
Save as WAV, not MP3
The hidden message lives in the exact sample values, so it only survives a lossless format. This tool always saves a PCM WAV for that reason. If you convert the result to MP3, AAC or Opus, or send it through an app that re-compresses audio, the low bits are rewritten and the message is gone. Share the WAV as a file, not through anything that re-encodes sound.
This is hiding, not encryption
Steganography conceals that a message exists; it does not protect the message. Anyone who suspects a clip carries LSB data can pull it out with a tool like this one. If the contents matter, encrypt the text first and hide the result, so that even if it is found it cannot be read.