Audio Reverser - Play Any Track Backwards

No. The reverse is done by a WebAssembly build of FFmpeg running in this tab, so your file is read from disk and processed on your own device. Open your browser's network panel while reversing a file and you will see nothing being sent.

MP3, WAV, M4A, AAC, OGG and FLAC up to 200 MB go in, and you can export the reversed result as MP3, WAV or M4A regardless of the source format.

The reverse itself just replays the samples in the opposite order, so it adds no distortion or noise. The only quality change comes from re-encoding on export, the same small cost as saving any edited file, so exporting to WAV keeps it lossless.

It runs FFmpeg's areverse filter, which reads every sample in the file and writes them out in the opposite order from end to start. A note that fades in now fades out, a drum hit that struck sharply now swells into silence, and speech becomes a string of unfamiliar sounds rather than words spoken backwards on purpose.

Reverse reverb and swell effects, where you reverse a sound, add reverb to the reversed copy in another tool, then reverse the result back so the reverb builds into the hit instead of trailing after it. It also covers backmasking-style sound design, transition risers and impacts, and simply checking what a sample or vocal line sounds like played backwards.

The whole file has to be buffered before it can be reversed, so a very long recording takes noticeably longer than a short one. If you only care about one section, cut it down first with the audio trimmer, then reverse the shorter clip here.