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Om dette værktøj
Play any audio file backward from end to start. Useful for sound design, finding hidden 'backmasked' messages in songs, prank calls, music production effects (reverse cymbal swells, reverse reverbs), or just for fun.
Reversal is sample-accurate: every audio sample is read into memory and written out in reverse order. The output is encoded as MP3 at 192 kbps. Like every Privvert tool, this runs in your browser - your files don't leave your device.
Funktioner
- Sample-accurate reversal - every sample, in reverse order
- Reads MP3, WAV, M4A, AAC, OGG, FLAC, Opus
- Outputs MP3 at 192 kbps
- No quality loss for the reversal step itself (a single MP3 re-encode applies)
- Browser-only - nothing leaves your machine
- Free, no signup
- Optional half-speed playback after reversal for the classic spooky effect
Sådan bruger du det
- Drop in an audio file.
- Click Reverse.
- Download the reversed MP3.
Alt sker inde i din browser med JavaScript og WebAssembly. Dine filer bliver aldrig uploadet, aldrig gemt og aldrig set af os.
Ofte stillede spørgsmål
Yes, but very long files use a lot of memory because the entire decoded waveform must fit in RAM to be reversed. On phones, keep files under ~30 minutes for a smooth experience.
Trim the section you want with the trim tool first, then reverse the trimmed clip.
Reversal itself is lossless. The final MP3 encode is a single generational re-encode at 192 kbps, which is transparent for almost all material.
Some artists deliberately recorded backward audio (Pink Floyd, The Beatles); most 'hidden messages' are coincidence (apophenia).
Yes - reversing requires reading every sample, which means the file is decoded and re-encoded. Picking a lossless output format (WAV or FLAC) avoids any compression artefacts.
Music production (reverse cymbals, swooshes and pads), audio puzzles, hidden messages in podcasts, and just generally hearing what your voice sounds like backward. Also a quick sanity check for symmetry in test signals.