Reverse any audio file, the end becomes the start. Everything runs in your browser; your file never leaves your device.
Audio reverse plays a sound file backwards: the end becomes the start. It is handy for spotting hidden "backmasking" in music, creating reverse-cymbal swells and risers for production, or just for fun. Drop a file and download the reversed version, no settings to fiddle with.
It runs through ffmpeg's areverse filter compiled to WebAssembly, a single pass with nothing to configure. No account, no watermark.
No. ffmpeg compiled to WebAssembly reverses your audio in this browser tab, the file is read into memory on your own device and processed there with the areverse filter, and the reversed track is offered as a local download. Nothing reaches Sunasty or any third party. Open your browser's DevTools, go to the Network tab and watch: no request carries your audio.
Common uses are checking for backmasking in songs, producing reverse-reverb or riser effects, sound design, and language or music curiosity. The reversed file is a normal audio file you can play anywhere.
Yes. The output uses the same format as your input (MP3 stays MP3, WAV stays WAV, and so on).
Yes, once the page has loaded. Because the processing happens on your device, you can disconnect from the network and the tool keeps working. This is the clearest proof that your data never leaves your machine.
It is completely free and requires no sign-up. There are no watermarks, no daily limits and no tracking cookies needed to use the tool.