Reverse Audio Online
Reverse audio online, free: flip any MP3, WAV, M4A or FLAC so it plays backwards, then download it as an MP3. Runs entirely in your browser with ffmpeg — your file is never uploaded.
How do I play an audio file backwards?
To reverse a sound, load your file and press Reverse — the tool flips the entire track so it plays from end to start and hands you an MP3 to download. It reads almost any input (MP3, WAV, M4A, FLAC, Opus, OGG and more) and everything runs on your device with ffmpeg compiled to WebAssembly, so nothing is uploaded. Reversing is a staple of music production — reversed cymbals, risers and reverbs — and it is how you check a track for backmasking, the hidden-message-when-played-backwards trick. Want to trim first? Use the MP3 Trimmer; to change format, try the Audio Converter; to raise the level, the Volume Booster.
Frequently Asked Questions
How do I reverse an audio file?
Drop your audio file onto the tool or click to choose one, then press Reverse. The tool flips the whole track so it plays from end to start, shows a preview you can listen to, and lets you download the reversed version as an MP3. It all happens on your device, so you can reverse a clip in a few seconds without uploading anything.
Which formats can I reverse, and what do I get back?
You can load almost any common audio file — MP3, WAV, M4A/AAC, FLAC, Opus, OGG and more. The reversed result is saved as an MP3 at the bitrate you choose, which plays on every device and app. If you need the reversed audio in another format, run the MP3 through the Audio Converter afterwards.
Is my audio uploaded to a server?
No — reversing audio runs entirely in your browser with ffmpeg compiled to WebAssembly, so your file is never uploaded, logged or stored. The engine downloads once on the first use (about 10 MB) and is then cached, so later runs start instantly. Closing the tab clears everything.
Why would I reverse audio?
Reversing audio is used for creative sound design — reversed cymbals, risers and vocal swells are common in music production — and for the classic backmasking trick, where you reverse a track to hear whether it contains a hidden phrase. It is also a quick way to check reversed speech puzzles or to make fun backwards-talking clips. The reversed result is written out as an MP3 at the bitrate you pick, from 128 to 320 kbps.
How long a track can I reverse?
There is no server-side cap — reversing happens in your browser tab, so the limit is your device's memory. Songs and clips are quick; very long recordings take longer and are harder on a phone, because the whole track has to be held in memory to play it backwards. You need a current Chrome, Edge, Safari or Firefox — the engine uses WebAssembly and DecompressionStream.