Play a song, voice note or sound backwards, or back and forth, and save it as WAV
Processed in your browser. Nothing is uploaded. Checked against sources on 16 Oct 2026.Reverse Audio plays a song, voice note or sound effect backwards in your browser by mirroring every sample, so the last moment plays first. It can also add the original after it as a boomerang. Files up to 300 MB work, nothing is uploaded, and the result downloads as a 16-bit WAV.
Press Choose an audio file or drop an MP3, M4A, WAV, OGG or FLAC on the page; it is decoded on your device.
Leave Play on Backwards, or choose Backwards, then forwards for a boomerang.
Press Reverse audio, then play the result in the before and after players.
Press Download to save the reversed WAV.
Reversed sound is used in music production for swells and reverse cymbals, in sound design for eerie voices, in the reverse singing challenge, and by people checking a song for backmasked messages. All of them need the same thing: the samples played in the opposite order.
Three ways to play it.
| Play | What you get | Length |
|---|---|---|
| Backwards | the whole file reversed | same as the original |
| Backwards, then forwards | reversed, then the original | twice the original |
| Forwards, then backwards | the original, then reversed | twice the original |
The two boomerang options meet at the same sample, so there is no jump where the direction changes.
Exact, not approximate. Sample number n of the result is sample number length minus 1 minus n of the original, in every channel, and stereo channels are never swapped. Nothing is resampled or filtered, and reversing the result again gives the original samples back exactly. Each result was checked by reading the WAV back with a separate reader and comparing every sample with the input read from the other end.
What goes in, what comes out. MP3, M4A, AAC, WAV, OGG, Opus, FLAC and AIFF files are decoded by the browser itself, at the file's own sample rate where the file states it. The result is a 16-bit PCM WAV, because browsers cannot write MP3. A minute of stereo at 44.1 kHz is about 10 MB.
On your device. The file is never uploaded. Play the original and the reversed version side by side before downloading, and cut a shorter piece first with Audio Cutter if only one phrase needs reversing.
Drop the file on Reverse Audio, leave Play on Backwards and press Reverse audio. The page mirrors every sample, so the last moment plays first, and offers the result as a WAV to play and download. MP3, M4A, WAV, OGG and FLAC files up to 300 MB work.
Record a short phrase, reverse it, and learn to sing what you hear. Then record yourself singing the backwards version and reverse that recording: if you copied it well, the original phrase comes back. The Backwards, then forwards option puts both versions in one file for comparison.
Browsers can decode MP3 but none can encode it, so the reversed samples are saved as uncompressed 16-bit WAV, which every phone, computer and editor plays. A WAV is about 10 MB per minute of stereo audio. Convert it to MP3 afterwards if a smaller file is needed.
No. Reversing only changes the order of the samples, not their values, so nothing is resampled, filtered or compressed. Reversing the result a second time gives back the original samples exactly. The only change from an MP3 or M4A source is that the WAV is uncompressed and larger.
Cut the part first with Audio Cutter, which saves the chosen stretch as its own file, then reverse that file here. To put a reversed passage back inside a longer recording, join the pieces in order with Merge Audio or arrange them in Audio Editor.
No. The audio is decoded, reversed and written by your own browser, and the WAV is created on your device. Nothing is sent to a server, so voice notes and private recordings stay with you. Closing the tab clears everything from memory.
Rates and rules change; check the source before you rely on a figure.
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Same job, other tools: Hz Generator – Type a frequency in hertz and hear it, from 20 Hz to 20,000 Hz · Frequency Generator – Generate a steady test frequency for speakers, headphones or instruments · Audio Sweep Generator – Play a slow logarithmic sweep and hear every rattle in the room · Headphone Frequency Test – Hear where your headphones stop, by ear rather than by chart.
On the related tools: Mic Test – See your voice on a live waveform and hear it played straight back.