Fast, free M4B to MP3 converter. No registration required.
3,715件のファイルを変換済み
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またはインポート元
変換方法
1
Upload your .m4b 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 .mp3 file when it's ready.
M4Bとは？
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.
形式の詳細
正式名称
MPEG-4 Audiobook
拡張子
.m4b
主な特徴
Chapter support
Bookmark resume
iTunes compatible
AAC compression
MP3とは？
MP3 is the most popular audio format worldwide. It uses lossy compression to reduce file size while maintaining acceptable audio quality for most listeners.
形式の詳細
正式名称
MPEG Audio Layer III
拡張子
.mp3
主な特徴
Universal compatibility
Small file sizes
Streaming support
ID3 tag support
M4BとMP3の比較
特徴
M4B
MP3
正式名称
MPEG-4 Audiobook
MPEG Audio Layer III
拡張子
.m4b
.mp3
最適な用途
Chapter support
Universal compatibility
よくある質問
Converting between lossless formats preserves perfect quality. When converting to lossy formats, our optimized encoding minimizes any audible difference. You can adjust bitrate to control quality vs. file size.
We preserve ID3 tags, album art, and metadata when both M4B and MP3 support them. Some metadata may not transfer between incompatible formats.
Pro users can batch convert multiple audio files simultaneously. Free users convert one file at a time with up to 20 free conversions per day (5/day without signup).
We support all standard sample rates from 8kHz (voice) up to 192kHz (studio quality). The default preserves your source file's sample rate.
Yes. Our audio converter handles music, podcasts, voice memos, and audiobook files. For podcasts, we recommend MP3 at 128-192kbps for the best balance of quality and file size.