Video Conversion
Convert MP4 to AIF Online — Free
Fast, free MP4 to AIF converter. No registration required.
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200万以上のファイル変換
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処理後にファイルを自動削除
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すぐに変換を開始
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変換方法
1
Upload your .mp4 file by dragging it into the upload area or clicking to browse.
2
Choose your output settings. The default settings work great for most files.
3
Click Convert and download your .aif file when it's ready.
MP4とは？
MP4 is the most widely used video container format. It stores video, audio, subtitles, and metadata. Compatible with virtually every device and platform, from smartphones to smart TVs.
形式の詳細
- 正式名称
- MPEG-4 Part 14
- 拡張子
- .mp4
主な特徴
- Universal compatibility
- Streaming support
- Small file sizes
- Hardware-accelerated playback
AIFとは？
AIF is a short extension variant of the AIFF audio format developed by Apple. Like AIFF, it stores uncompressed PCM audio at CD quality or higher.
形式の詳細
- 正式名称
- Audio Interchange File Format
- 拡張子
- .aif
主な特徴
- Lossless quality
- Apple standard
- Short extension variant
- PCM audio
MP4とAIFの比較
| 特徴 | MP4 | AIF |
|---|---|---|
| 正式名称 | MPEG-4 Part 14 | Audio Interchange File Format |
| 拡張子 | .mp4 | .aif |
| 最適な用途 | Universal compatibility | Lossless quality |
よくある質問
The audio track is extracted from your MP4 file without re-encoding when possible, preserving the original quality. If format conversion is needed, we use optimized settings to minimize any loss.
Free users can process files up to 100MB. Pro users can extract audio from videos up to 2GB with priority processing.
Audio extraction is fast — most files complete in under 30 seconds. Our servers handle the processing, so it works on any device.
Yes. You can adjust bitrate, sample rate, and channels before conversion. Default settings preserve the original audio quality from your MP4 file.
Yes. Our converter runs entirely in your browser — no app needed. Upload your video, extract audio, and download on any device.