Video Conversion
Convert MP4 to M4B Online — Free
Fast, free MP4 to M4B converter. No registration required.
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변환 방법
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 .m4b file when it's ready.
MP4란 무엇인가요?
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.
형식 세부 정보
- 전체 이름
- MPEG-4 Part 14
- 확장자
- .mp4
주요 기능
- Universal compatibility
- Streaming support
- Small file sizes
- Hardware-accelerated playback
M4B란 무엇인가요?
M4B is the MPEG-4 audiobook format used by Apple iTunes and many audiobook platforms. It supports chapter markers, bookmarking, and AAC compression for efficient audiobook delivery.
형식 세부 정보
- 전체 이름
- MPEG-4 Audiobook
- 확장자
- .m4b
주요 기능
- Chapter support
- Bookmark resume
- iTunes compatible
- AAC compression
MP4 vs M4B
| 기능 | MP4 | M4B |
|---|---|---|
| 전체 이름 | MPEG-4 Part 14 | MPEG-4 Audiobook |
| 확장자 | .mp4 | .m4b |
| 최적 용도 | Universal compatibility | Chapter support |
자주 묻는 질문
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.