01Phase 01
High-Fidelity Buffer Inversion
Reverses the sample order of every channel exactly. No resampling, filtering, or time-stretching is applied.
Audio Reverser · Lossless Backwards WAV Export
Reverse audio files and play backwards online
Invert audio tracks and sound effects with instant client-side playback. Create reverse vocal swells, backwards cymbal sweeps, and inverted sound design, with 4 ms fades at both ends to prevent clicks.
Audio Reverser
Runs locally in your browserReady
Drop an audio or video file here
WAV, MP3, M4A, FLAC, OGG, MP4, MOV or WebM. Decoded in your browser, never uploaded.
Choose file
100% browser-local processing · No files uploaded to any server
Acoustic Engineering Guide · Architecture
How this tool works in browser memory
How this tool decodes, analyzes, and masters your dialogue locally with zero cloud latency.
02Phase 02
Click-Free Boundary Micro-Fades
Applies 4 ms linear fades at the start and end of the reversed audio so it does not begin or end with a click or pop.
03Phase 03
Instant Audition & Lossless Export
Audition reversed playback instantly in your browser and download an uncompressed 16-bit PCM WAV file with no lossy compression.
Connected finishing workflows
Explore companion utilities for dialogue cleanup, speech pacing, and mastering.
Audio Standards & Research
Engineering guides & deep-dive workflows
Explore the acoustic principles, ITU-R loudness standards, and pacing techniques behind this tool.
Audio Cutting7 min read
How to Trim Audio Files Accurately at Zero-Crossings Without Clicks
The physics of zero-crossing splices and 8ms equal-power crossfades: how to cut dialogue tracks cleanly without abrupt voltage step artifacts.
Free Audio Editor7 min read
Free Audio Editor for Voice: How to Choose a Safe, Focused Workflow
A 5-point evaluation framework for voice tools: local processing privacy, reversible edits, dialogue-specific pacing controls, and uncompressed export.
WAV vs MP36 min read
WAV vs MP3 for Editing Voice: When to Choose Each Format
A technical deep-dive into codec generation loss: why you must keep your master timeline in PCM WAV and only compress to MP3 for final distribution.
Frequently Asked Questions
Common Questions & Technical Clarifications
How do I reverse an audio file online for free?+
Drop your MP3, WAV, or M4A file into the AutoSilenceCut workspace above. The engine instantly inverts the audio buffer in memory, allowing you to preview and download the backwards WAV audio file immediately.
Does reversing audio cause clicks or pop noises at the edges?+
No. AutoSilenceCut applies 4 ms fades at the start and end of the reversed audio, so playback begins and ends without a click.
Can I reverse specific sections or entire audio tracks?+
This tool reverses the whole file. To reverse only one section, trim it first with the Audio Cutter, then reverse the trimmed clip here.
Is my audio uploaded to any external server?+
No. All buffer flipping and audio rendering occurs 100% locally on your computer inside your browser’s Web Audio engine.
What audio export format do I receive?+
You receive an uncompressed 16-bit PCM WAV file at your browser's audio sample rate (usually 44.1 kHz or 48 kHz).