Reverse Any Audio File Instantly in Your Browser Reverse any audio file to play it backwards.
Audio Reverse
Reverse any audio file to play it backwards.
Upload Audio
Drop your audio file or click to browse.
Reverse
Click Reverse to flip the audio backwards.
Download
Preview and download your reversed audio file.
What Is Audio Reverse?
The Audio Reverse tool flips audio files so they play backwards. Upload any audio file, reverse it with one click, preview the result, and download. This is a popular creative effect used in music production for reverse cymbals, reversed vocals, and atmospheric sound design. It's also fun for discovering "hidden messages" in music (backmasking). The tool simply reverses the order of audio samples in each channel, preserving quality perfectly. Processing uses the Web Audio API and happens entirely in your browser.
Why Use Audio Reverse?
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One-click audio reversal with instant preview
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Perfect quality — no lossy processing involved
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Supports all common audio formats
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Completely client-side and private
Common Use Cases
Music Production
Create reverse cymbal crashes, reversed vocals, and atmospheric textures.
Sound Design
Generate unique sound effects by reversing recordings.
Entertainment
Listen to songs backwards to discover hidden messages or create fun content.
Education
Demonstrate audio concepts in music theory or physics classes.
Technical Guide
During reversal, the audio file is decoded into an AudioBuffer using AudioContext.decodeAudioData(). For each channel in the buffer, the tool reads the Float32Array of samples using getChannelData(). The sample array is then reversed in-place using a simple swap algorithm that exchanges elements from the start and end, moving inward. This reversal is applied to all channels independently. The reversed AudioBuffer is then encoded as a 16-bit PCM WAV file. Since the operation only reorders existing samples without any mathematical transformation, the reversal is perfectly lossless. The waveform display updates to show the reversed audio shape. Preview playback uses a standard AudioBufferSourceNode to play the reversed buffer.
Tips & Best Practices
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1Reverse cymbals and reverb tails create great transition effects in music
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2Combine with audio-fade for smooth reversed swells
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3Reversing speech creates an unrecognizable but rhythmically interesting effect
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4The process is perfectly lossless — reverse twice to get the original back
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🎵 Audio ToolsFrequently Asked Questions
Q Is reversing audio lossless?
Q Can I reverse it back?
Q What is backmasking?
Q Does it work with any audio format?
Q Is it processed locally?
About This Tool
Audio Reverse is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.