Audio Reverser Online

Reverse audio online for MP3, songs, voice recordings, and sound effects

SonicLab Audio Reverser is a browser-based audio reverser that makes a recording play backward. Use this online sound reverser to reverse MP3 files, songs, voice recordings, podcast clips, and sound effects. Upload a supported file, preview the backward audio, then download your reversed file as WAV or MP3.

The tool works entirely in a compatible browser. It accepts MP3, WAV, M4A, OGG, and FLAC files up to 100 MB, processes the selected audio locally, and lets you compare the original and reversed versions before you export.

What the SonicLab Audio Reverser does

• Reverse Audio in Your BrowserReorder an audio file so it plays from the last sample to the first, without installing desktop software.
• Local Audio ProcessingYour audio is decoded and reversed in the browser tab. The tool does not send the selected file to a processing server.
• MP3, WAV, M4A, OGG and FLACUpload a supported music file, voice recording, podcast clip, or sound effect up to 100 MB.
• Original and Reversed PreviewSwitch between the original and reversed versions to check the result before downloading.
• Stereo and Mono AudioThe reversal is applied channel by channel, so both mono and stereo recordings retain their channel layout.
• WAV or MP3 DownloadDownload the reversed audio as WAV or MP3. Choose WAV when you want to avoid another MP3 encoding step.

How to reverse audio online in three steps

1. 1
   Upload an audio file

   Choose an MP3, WAV, M4A, OGG, or FLAC file up to 100 MB. Your file is processed locally in the browser.
2. 2
   Preview the reversed audio

   Listen to the reversed version, compare it with the original, and use the waveform to move to a specific point.
3. 3
   Download your reversed file

   Select WAV or MP3, then download the reversed audio file when you are satisfied with the preview.

Use this tool as a voice reverser, song reverser, or sound reverser

Reverse MP3 and song files: Producers and creators reverse a song or musical phrase to create backwards intros, transitions, reverse cymbal swells, and experimental textures. Pair a reversed section with the Slowed & Reverb Generator when you want to shape a different version for a music project.

Reverse voice recordings: Use the tool as a voice reverser for backward speech experiments, sound design, creative edits, or a quick comparison of original and reversed narration. For a different vocal treatment, use the Voice Pitch Shifter.

Reverse sound effects: A reversed hit, cymbal crash, whoosh, door sound, or ambient recording can create anticipation before a scene change, video transition, or music drop. The original sound remains available in the preview toggle for an easy A/B check.

How this browser-based audio reversal works

Audio reversal changes the order of the samples in a recording. For each channel, the last sample is copied to the first position, the second-to-last sample is copied to the next position, and so on. Playback speed and pitch are not deliberately changed; the recording simply runs backward.

SonicLab uses the browser's Web Audio API to decode the selected file, create a separate reversed audio buffer, and play both versions for comparison. Because processing occurs in the browser tab, the tool does not need to upload your selected audio file to a processing server.

Audio Reverser FAQ

• What is an audio reverser?

  An audio reverser changes the playback order of a recording so the final sample plays first and the first sample plays last. The result is a backward version of the original audio.
• How do I reverse audio online?

  Upload a supported audio file, wait for the reversed preview to load, listen to the result, and download it as WAV or MP3. SonicLab performs these steps in your browser.
• Can I reverse an MP3 file?

  Yes. Upload an MP3 and download the reversed result as WAV or MP3. The tool also accepts WAV, M4A, OGG, and FLAC input files up to 100 MB.
• Can I use this as a voice reverser?

  Yes. Upload a supported voice recording to create a backward version. You can preview the reversed voice before downloading the file.
• Can I reverse a song online?

  Yes. Upload a supported song file, preview the reversed song, and download the result. This can be useful for backward vocal effects, reverse transitions, and creative listening.
• Are my audio files uploaded to a server?

  No. The selected file is decoded and reversed locally in your browser tab. The tool does not send the file to a processing server.
• Does reversing audio reduce quality?

  The reversal process changes the order of audio samples; it does not add an effect or change playback speed. Download as WAV to avoid MP3 encoding. MP3 downloads are encoded at 192 kbps.
• Does the audio reverser work with stereo files?

  Yes. The tool reverses each audio channel independently, so it works with both mono and stereo recordings.
• Which file formats does the online sound reverser support?

  You can upload MP3, WAV, M4A, OGG, and FLAC files up to 100 MB. Reversed downloads are available as WAV or MP3.

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