How it works
- Drop your audio file. MP3, WAV, FLAC, AIFF, OGG or M4A up to 500 MB — it's decoded locally, nothing is uploaded.
- Choose what to reverse, then click Reverse. The whole file, or just a passage you select on the waveform (a cymbal, a breath, a word). The audio is flipped end-to-start in your browser and the reversed waveform is drawn so you can see the result.
- Listen and download. Play the reversed audio right on the page, then download it in the same format as your source file.
Features
- One-click reverse. No timeline editing needed — drop, click, done.
- Visual confirmation. The waveform redraws backwards, so you can check the flip at a glance before downloading.
- Reverse a selection. Reverse only the passage you pick, to the sample; everything outside it stays bit-identical, with a 10 ms crossfade at each join.
- No click at the edges. If the reversed audio starts or ends mid-sound, a 2 ms fade removes the click; files that start and end in silence are left untouched.
- Reverse reverb (swell), as an option. The audio is reversed, a reverb generated in your browser is added, then everything is reversed back: the tail rises into each sound and stops on its attack. Set the swell length (0.3 to 8 s) and the mix; the file gets longer by the swell, and a peak limiter keeps it at −1 dBTP if needed.
- Same-format export. Lossless sources stay lossless at their original bit depth (WAV, AIFF, FLAC); MP3 and M4A are re-encoded at the source bitrate or higher.
- 100% in your browser. Your track never leaves your computer — processing runs locally with ffmpeg.wasm.
FAQ
Is this reverse tool free?
Yes. Without an account you get 2 free uses per day across AudioKit's free tools; with a free account, 5 per day. A use is only counted at the first download of the reversed file; loading, reversing and listening are free. AudioKit Premium removes the daily limit.
Is my audio file uploaded to a server?
No. The file is decoded, reversed and re-encoded entirely in your browser with ffmpeg.wasm and never leaves your machine. The only network call is a tiny anonymous counter that tracks your daily free quota.
Which audio formats are supported?
MP3, WAV, FLAC, AIFF, OGG and M4A files up to 500 MB. The reversed file is exported in the same format as the source: lossless stays lossless, lossy formats are re-encoded at the source bitrate or higher (an MP3 at 320 kbit/s stays at 320 kbit/s).
What is reversing audio used for?
Mostly sound design and arrangement: reversed cymbals and risers to lead into a drop, reversed reverb tails for ghostly vocal intros, swooshes for transitions — or simply checking what a passage hides when played backwards. Reverse the whole track, or select just the passage you need: it is reversed in place, with smooth joins, and the rest of the file stays exactly as it is. For a reversed reverb tail, pick the Reverse reverb option: a reverb generated in the tool (not a recorded room) rises into the sound and stops on its attack.
Can I get the original back after reversing?
Yes. Your source file on disk is never modified, so you can always reload it. And since reversing only changes the order of samples, reversing an already-reversed file gives you back the original — with no loss at all in WAV, AIFF or FLAC (an MP3, OGG or M4A is re-encoded on each pass: a minimal loss). The one exception: if the anti-click option faded an edge that started or ended mid-sound — untick it for a bit-exact round trip. This does not apply to the Reverse reverb option, which adds a reverb.