Audio

Audio reverser

Reverse any audio file and download the result. Works on MP3, WAV, OGG, FLAC, and more.

Drop your audio file here, or

MP3 · WAV · OGG · AAC · FLAC · M4A · Max 100 MB

Upload an audio file and click Reverse. The output is exported in the same format as the input.

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100% private. All processing happens locally in your browser — no files or data are ever sent to a server.

How to use Audio reverser

  1. 01 Drag and drop your audio file onto the upload area, or click to browse
  2. 02 Choose your settings (format, quality, timestamps, etc.)
  3. 03 Click the action button — the engine loads on first use, then processes your file
  4. 04 Click Download to save the result to your device

Frequently asked questions

Common questions about Audio reverser.

Is Audio reverser free to use?
Yes, Audio reverser is completely free. No account, subscription, or payment is ever required — just open the page and start using it.
Does Audio reverser upload my data to a server?
No. Audio reverser runs entirely in your web browser using client-side JavaScript. Your files, text, and data never leave your device, making it 100% private.
Can I use Audio reverser on my phone or tablet?
Yes. Audio reverser is fully responsive and works on all modern smartphones, tablets, and desktop browsers without installing any app.
Are my audio files kept private?
Yes. Audio reverser processes all audio entirely in your browser using ffmpeg.wasm (a WebAssembly build of FFmpeg) or the Web Audio API. Your files are never uploaded to any server.
Why does it take a moment to start the first time?
The audio engine uses ffmpeg.wasm, a ~30MB WebAssembly library that loads on demand — only when you click the action button. Once loaded, subsequent operations are instant. It is not loaded on page arrival to protect page speed.

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About Audio reverser

The Audio Reverser plays audio backwards by reversing the time domain of the waveform using ffmpeg.wasm. Reversed audio is used in music production (reverse reverb, reverse cymbal effects), creative sound design, linguistic research into phoneme patterns, and as a simple obfuscation technique. The output file is the same format as the input. Processing runs entirely in your browser using ffmpeg.wasm — your audio files are never uploaded to a server.

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