Reverse Audio

About Reverse Audio

This free tool plays audio backwards. Drop in a song, a voice note or a sound effect, and it is reversed at once — the last sound comes first and the first sound comes last. Press Play to hear it, then download it.

You can reverse the whole file, or only a part of it. With "Only a part", you drag two handles on the waveform, and just that stretch plays backwards while the rest stays normal. That is handy for checking one line of a song for a "hidden message", or for flipping a single word in a recording.

Everything happens in your browser. Your audio is never uploaded, so private recordings stay on your device.

Features

• Instant reverse — the sound is reversed as soon as the file opens, with no button to press
• Listen first — play the result, pause it, or click the waveform to jump to any point
• Waveform of the result — you see the reversed sound, with a playhead
• Reverse only a part — drag two handles, or type the start and end times
• MP3 or WAV — an MP3 comes back as an MP3 at about the same bitrate; a WAV comes back as a lossless WAV
• Every channel is reversed — stereo stays stereo, and the length does not change
• One-click download — the file is made in the background while you listen
• Private — no upload, no sign-up, no watermark

What "reversed" means here

The tool reads every sample of the sound (tens of thousands per second) and writes them in the opposite order. Nothing else is changed: the pitch, speed and length stay the same, and the left and right channels stay on their own sides.

That is why reversed speech sounds so strange. The words are still there, but every sound — even each "s" and "t" — now runs from its end to its start.

MP3 or WAV?

• MP3 is the default when your file is an MP3, M4A or OGG. For an MP3 file, the quality starts at about the same bitrate as the original (otherwise 192 kbps), and you can change it from 128 to 320 kbps. Your choice is remembered.
• WAV is the default when your file is a WAV or FLAC. It is lossless, so it is the best choice if you will edit the sound again — but the file is about ten times bigger.

To change the format of the result later, use the Audio Converter.

Common uses

• Hidden messages — play a song backwards and listen for "backmasking"
• Sound effects — a reversed cymbal or piano note makes a "swell" that rises into a beat
• Music and remixes — reversed vocals or guitar for an intro
• Fun with friends — say a word backwards, reverse it, and see if it sounds right
• Language games — record a sentence, reverse it, and try to copy it
• Videos — a backwards sound for a TikTok or Reels clip (for the picture too, use Reverse Video)

Frequently asked questions

Is it free, and is my audio uploaded?

It is free, with no sign-up and no watermark. The file is reversed in your browser and is never sent to a server.

Which files can I reverse?

Any audio file your browser can play: MP3, WAV, M4A (AAC), OGG and usually FLAC. The result is saved as MP3 or WAV. Very long files (an hour or more) may be too big for the browser's memory — cut them first with Trim Audio.

Does reversing change the pitch or the speed?

No. The sound only runs the other way. The pitch, the speed and the length stay the same. To change the speed as well, use the Audio Speed Changer.

Can I reverse just one part of a song?

Yes. Choose Only a part, then drag the two handles on the waveform (or type the start and end times). Only that part plays backwards. Press Play the reversed part to hear just that bit.

Are there really hidden messages in songs played backwards?

Some artists have put reversed words in their songs on purpose — this is called backmasking. Most "messages" people hear are just the brain finding words in random sounds. Try it and decide for yourself.

Why is my MP3 a little longer than the original?

An MP3 file always has a few milliseconds of silence at the start and the end (it is how the format works). The sound itself is the same length. Choose WAV for an exact copy.

How to use it

• Drop an audio file on the box, or click it to choose one
• It is reversed at once — press Play to listen, or click the waveform to jump around
• To reverse only one part, choose Only a part and drag the two handles
• Choose MP3 or WAV (and the MP3 quality, if you like)
• Press Download to save the reversed file