Reverse Audio
Reverse Audio plays a clip backwards — for reverse-reverb effects, hidden-message gags, or creative sound design. Both the whole waveform is flipped end to end. It's processed in your browser, so your file stays on your device.
Add your audio file
The file is read by your browser and stays on your device — there is no upload step.
Your audio
The work runs in this tab. Nothing is sent anywhere, and the download is generated locally.
Output —Load audio
How to use Reverse Audio
- 01Upload
Add your audio
Drop an MP3, WAV, M4A or other audio file in.
- 02Customize
Reverse
The whole clip is flipped to play backwards on export.
- 03Process
Download
Export to render the reversed audio and save it.
What reversing does
Plays the waveform back to front. It is used for reverse-cymbal swells into a downbeat, for transition effects, and occasionally for checking what a sample sounds like the other way round.
What does not change
Length, sample rate, channels and level. Reversing is a lossless rearrangement of samples — nothing is recomputed, so it costs no quality at all.
Supported formats
- MP3
- WAV
- M4A
- OGG
- FLAC
- Maximum file size —
- bounded by your device's memory
- Processed by —
- FFmpeg (WebAssembly), on your device
Your file, and what the page does
Your file is never uploaded. Reverse Audio reads it into this browser tab and processes it with FFmpeg compiled to WebAssembly on your own device. There is no upload endpoint in the application and no copy on any server — closing the tab discards it.
That is also why processing takes longer here than on a site that uploads: your device is doing the work rather than a rack of servers. The trade is that the file never leaves it.
What the page does send or fetch
- The processing engine, once
- The first time you use any video or audio tool, the browser downloads the FFmpeg WebAssembly build (~30MB) from the jsDelivr CDN and reuses the cached copy afterwards. That is a file coming to you — no part of your own file is in the request.
- Ads on the page
- The site is funded by advertising, so the page loads Google AdSense. That carries the usual web basics — IP address, browser, referring page — as on any ad-supported site.
- An anonymous usage counter
- When Reverse Audio finishes we record that the tool ran, whether it succeeded and how long it took. No file data, no identifier, no cookie.
Your file is not on that list. How this works.
Frequently asked questions
The clip is re-encoded once at high quality, so any change is negligible; export to WAV for a lossless result.
Trim the section you want first, then reverse that clip.
Reverse-reverb swells, transition whooshes, backmasking effects and other creative sound design.
Yes — Reverse Audio is completely free. There's no account, sign-up, watermark or limit.
No. It runs in any modern browser — Chrome, Edge, Safari, Firefox, Brave — with nothing to download or install.
Looking for something else?
- You want it slower or fasterChange Speed
- You want a fade insteadFade In / Out
- Only a section should be reversedTrim Audio
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