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Audio Reverser

Flip any sound clip to play backwards in seconds and download it as a WAV. Great for reverse-reverb effects, hidden-message fun, and creative production, all processed locally.

Updated

Files never leave your browser

How to use Audio Reverser

The audio reverser flips a sound file so it plays backwards, then lets you download the result as a WAV. It decodes your file in the browser, reverses every sample, and re-encodes it — all locally, so nothing is uploaded. Reversing audio is a staple creative effect: it powers the swelling reverse-reverb that precedes a vocal, the eerie backwards textures in film sound design, and the classic game of hiding or revealing backmasked messages. It is also just fun to hear what familiar sounds become in reverse.

  1. Select an audio file from your device.
  2. Wait a moment while it is decoded and reversed in your browser.
  3. Play the in-page preview to hear the reversed result.
  4. Click Download WAV to save it.
  5. Convert the WAV to another format later if you need to.

Your data never leaves your device — 100% private processing.

How reversing audio works

Digital audio is a long list of samples — amplitude measurements taken thousands of times per second. Reversing a clip simply means playing those samples from last to first. This tool decodes your file into raw sample data with the Web Audio API, walks each channel from the end back to the start to build a reversed copy, and writes the result into a standard WAV container. Because it only reorders existing samples, the operation is lossless and fast; the main cost is memory, since the entire clip must be held in the browser at once.

Creative uses for reversed sound

Reversed audio is everywhere in modern production. The most common trick is reverse reverb: a sound is reversed, drenched in reverb, then reversed again so the reverb tail swells up into the original, creating that signature suck-in before a vocal or snare. Sound designers reverse everyday recordings to make unsettling, otherworldly textures for horror and sci-fi. Musicians reverse cymbals and synth notes for risers that build tension into a drop. And the long tradition of backmasking — hiding messages that only make sense when played backwards — is easy to explore by simply reversing a clip and listening.

Worked examples

Reverse a voice

Inputs: voice.mp3

Result: voice-reversed.wav playing backwards

Reverse a cymbal

Inputs: cymbal.wav

Result: Swelling reverse riser

Glossary

Sample
A single amplitude measurement in digital audio.
WAV
An uncompressed, lossless audio file format.
Reverse reverb
A swelling effect made by reversing audio around reverb.
Backmasking
Placing sound that is meant to be heard when reversed.

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