音声リバースツール
ブラウザで任意の音声ファイルを逆再生。
Drop your Audio file (short clips recommended) here
or click to browse · max 500 MB
Audio reverse loads the entire file into memory. Use short clips only (under 5 minutes recommended).
Settings
128k for speech · 192k for general use · 320k for music
FFmpeg WASM (~25MB) will be downloaded on first use and cached by your browser.
Audio Reverse
Reverses audio playback so the file plays backwards. Creates creative effects, reveals hidden messages, or produces unique soundscapes from existing audio. Uses FFmpeg WASM's areverse filter for high-quality reversed output.
用途
- Creating reverse audio effects for music production
- Listening to audio backwards for creative purposes
- Generating unique sound effects from existing recordings
- Reversing speech for artistic or educational purposes
- Creating ambient soundscapes with reversed instruments
使い方ガイド
- Click the upload area or drag and drop your audio file
- Click 'Convert to .MP3' to reverse the audio
- Preview the reversed result in the built-in player
- Click Download to save the reversed MP3
仕組み
Upload an audio file and click Convert. FFmpeg WASM loads the entire audio into memory and reverses the sample order using the areverse filter. The result is encoded as MP3.
ヒントとベストプラクティス
- Keep audio files short (under 5 minutes) for best performance
- Trim your audio first if you only need a section reversed
- Reversed reverb and cymbal crashes create popular sound effects
よくある質問
Why is there a file length recommendation?
Audio reverse loads the entire file into memory before reversing. Short clips (under 5 minutes) work best. Longer files may cause memory issues in the browser.
Does reversing audio change the pitch?
Yes, reversed audio naturally plays at the same speed but with all frequencies reversed in time. It creates the characteristic 'backwards' sound.
Can I reverse a portion of the audio?
Use the Audio Trimmer first to cut the section you want, then reverse the trimmed clip.
プライバシーとセキュリティ
このツールはWebAssembly（WASM）にコンパイルされたFFmpegを使用しています。WASMバイナリ（約25MB）は初回使用時にCDNからダウンロードされ、ブラウザにキャッシュされます。すべてのファイル処理はお使いのデバイス上でローカルに行われ、ファイルがサーバーにアップロードされることは一切ありません。そのため、機密性の高いメディアファイルも安全に処理できます。大きなファイルの場合、デバイスのCPUや利用可能なメモリによって処理に時間がかかることがあります。