M4Bot
Audiobook Converter for Mac
Convert MP3, WAV, and M4A files to M4B format with automatic chapter creation and metadata management. All processing happens locally on your Mac. Optimized for Apple Silicon for maximum speed.
Key Features
Convert Audio Formats
Convert MP3 to M4B, WAV to M4B, and M4A to M4B. Merge multiple audio files into a single audiobook with high-quality AAC encoding.
Automatic Chapters
Chapters are automatically created from your audio files. Edit chapter titles, reorder files, and customize metadata before conversion.
Metadata Management
Add book information including title, author, narrator, year, and cover art. Metadata is automatically extracted from source files.
Audio Quality Control
Customize bitrate (64-320 kbps), sample rate (44.1/48 kHz), and channel layout (mono/stereo) to match your preferences.
100% Local Processing
All conversion happens on your Mac. Your files never leave your computer. No cloud uploads, no data collection, complete privacy.
Apple Books Compatible
Created M4B files work perfectly with Apple Books, iTunes, and all major audiobook players with full chapter navigation support.