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How to reverse audio

Reversing audio plays it backwards — the last sound becomes the first. It's used for creative effects, checking for hidden "backmasked" messages, building reverse-cymbal swells in music, or just for fun. It takes a single click in your browser, on the whole track or just a selection.

This uses the free AudioTrim editor. Nothing is uploaded — the reversal happens on your device.

Step by step

Open your file. Drag the audio onto audiotrim.app.
Choose what to reverse. To reverse the whole track, leave nothing selected. To reverse just a part, drag across the waveform to highlight that section first.
Click Reverse. The audio (or your selection) is flipped end to end. You'll see the waveform mirror itself.
Listen. Play it back to hear the reversed result.
Download. Export as MP3 or WAV.

Creative idea: reverse a cymbal crash or a piano chord, then place it just before a beat for a smooth "swell" into the downbeat — a classic production trick. You can also reverse a clip, apply another effect, and reverse it back for unusual textures.

Frequently asked questions

Does reversing change the audio quality?

No. It only reorders the existing samples end to end; nothing is lost. Export at a higher bitrate to keep full quality.

Can I reverse just one word or section?

Yes — select that section on the waveform first, then click Reverse. Only the highlighted part is flipped.

Can I undo it?

Yes. Click Reverse again on the same selection to flip it back, or use Undo.

What's "backmasking"?

It's hidden audio meant to be heard when a track is played backwards. Reversing a song lets you listen for it — often it's just a novelty.

Reverse your audio →