Audio Reverser
Reverse an audio clip end-to-start. Useful for sound design and hidden-message hunts.
Quick answer: Audio Reverser: reverse an audio clip end-to-start. Useful for sound design and hidden-message hunts. Runs entirely in your browser, free, no signup.
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Good to know
Reversing audio is a genuinely lossless operation on the samples themselves — the tool decodes the file, plays the buffer back to front sample by sample, and re-encodes it. The only quality change comes from re-encoding a compressed source (like an MP3) to WAV, which is a format conversion rather than a reversal artifact. If you plan to reverse and then reverse again, you will get your exact original waveform back.
In sound design, reversed audio is a workhorse. A reversed cymbal crash or piano chord creates the classic "swell" that builds into a downbeat or a scene cut; reversed reverb tails produce eerie, sucked-in textures used all over film trailers. The trick is usually to reverse a short, decaying sound so the natural fade becomes a rising ramp.
The stereo image is preserved because both channels are reversed in lockstep — a sound that panned left-to-right will now sweep right-to-left, but the spatial relationship stays intact. That said, expect speech to become unintelligible; the "hidden backwards messages" game is mostly pareidolia.
To reverse only part of a clip, trim the segment first with the audio cutter, reverse it here, then splice it back with the audio joiner. And since browsers can only encode WAV natively, run the result through an audio converter if you need a smaller MP3.
Frequently asked questions
- What can I do with reversed audio?
- Sound design (reversed cymbals are a staple of cinematic transitions), creative remixes, ear-training puzzles, and the famous 'hidden messages' game. Hand-on-heart, you'll mostly hear gibberish.
- Is the reversal lossless?
- Yes — sample-by-sample reversal preserves every bit of the original. The only loss is from re-encoding compressed inputs (MP3) to WAV.
- Are stereo channels reversed independently?
- Each channel is reversed individually, but they're reversed in lockstep — the spatial imaging is preserved (just played backwards).
- Are my files uploaded?
- No — decoding and reversing both happen in your browser.
- Can I reverse just a section?
- Not directly — use our Audio Cutter to extract the segment first, reverse it here, then optionally re-join it with the original using the Audio Joiner.