Reverse Audio

Reversing audio flips the waveform so the last moment plays first. Musicians use it for reverse-cymbal swells and hidden “backmasking” effects, and it’s a quick way to check what a sample sounds like backwards. The reversal is exact and lossless before re-encoding.

The file is decoded to raw samples, reversed sample-by-sample, then re-encoded to MP3 or WAV. It all runs in your browser, so even private recordings stay on your device.

A staple use is the reverse-reverb vocal effect: reverse a vocal phrase, print reverb onto the backwards version, then reverse the result again so the reverb swells into the word instead of trailing after it. Sound designers use the same trick to build risers and whooshes for video transitions, and podcasters sometimes reverse a short stinger to create an intro that resolves into the show's theme.

If your workflow involves several passes — reverse, edit elsewhere, reverse again — export WAV at each step and only switch to MP3 for the final file, so lossy re-encoding happens once rather than stacking up. It is also worth knowing that reversed speech rarely sounds like intelligible words: consonants are built from fast attacks that become unnatural swells when flipped, which is why backwards voices sound so distinctly eerie.