Reverse Audio
Reverse any audio file online for free. Play songs, voice memos and sound effects backwards and download the result as MP3 — 100% in your browser.
Note: reversing buffers the entire decoded file in memory, so very long recordings (over ~30 minutes) may be slow or fail on low-memory devices.
What is the Reverse Audio?
The Reverse Audio tool plays your file backwards — the last sample becomes the first. Drop in a song, a voice memo or a sound effect and get a reversed MP3 in seconds.
- One-click, sample-accurate audio reversal
- Works with MP3, WAV, M4A, FLAC, OGG and more
- Great for reverse cymbals, risers and sound design
- Built-in preview player before download
- 100% local — audio is never uploaded
- Free and unlimited
How to use the Reverse Audio
- 1
Drop an audio file onto the box or click to browse.
- 2
Click Reverse Audio and wait for the in-browser engine to finish.
- 3
Preview the backwards audio with the built-in player.
- 4
Download the reversed MP3.
About the Reverse Audio
The Reverse Audio tool plays your file backwards — the last sample becomes the first. Drop in a song, a voice memo or a sound effect and get a reversed MP3 in seconds. It is a one-click effect with no settings to fiddle with.
Reversed audio is a staple of music production (reverse cymbals, swells and pre-verb effects), a fun way to hunt for hidden messages in songs, and useful for building suspense risers in video edits. Sound designers also reverse impacts to create natural-sounding whooshes.
Everything runs entirely in your browser with a WebAssembly build of ffmpeg — no uploads, no server, no account. Because reversing needs the whole file in memory at once, very long recordings take more RAM; files up to around 30 minutes work well on a typical computer.
Frequently asked questions
What happens when you reverse audio?
Every sample in the file is written out in the opposite order, so the recording plays back-to-front. A fade-out becomes a fade-in, speech becomes unintelligible backwards sounds, and drum hits turn into swells.
Can I reverse just part of a song?
Trim the section you want first with the Trim Audio tool, then reverse the trimmed clip here. That two-step approach gives you precise control over exactly which part plays backwards.
Is there a length limit for reversing?
The reverse filter has to hold the entire decoded file in memory before it can output anything, so very long recordings use a lot of RAM. Files up to roughly 30 minutes are comfortable on a typical modern computer.
Is my audio uploaded to a server?
No. The reversal runs entirely in your browser using WebAssembly. Your file is processed on your own device and never sent anywhere.
Does reversing audio lose quality?
The reversal itself is lossless — samples are just reordered. The output is re-encoded to a high-quality MP3, which is transparent for most listeners; reverse a WAV if you want to keep an uncompressed workflow.
Related tools
Audio Pitch Changer
Change the pitch of any audio file in semitones without changing its speed. Free online pitch shifter that runs entirely in your browser — no upload.
Change Audio Speed
Change audio speed online for free. Speed up or slow down audio from 0.5x to 2x without changing pitch, exported as MP3 — nothing is ever uploaded.
Slowed and Reverb Maker
Make slowed and reverb edits of any song online for free. Adjust the slow-down amount and reverb depth, then download an MP3 — no upload, no watermark.
Trim Audio
Trim audio online for free. Cut a clip from any audio file by setting start and end times, exported as MP3 right in your browser — nothing is ever uploaded.