Bulk M4B to iPhone Audio Converter Online — Free HD Quality
Drag and drop your multiple M4B files into this 100% free online M4B to iPhone Audio converter (.m4b to .iphone), and click the Convert button to bulk convert them to iPhone Audio format in HD quality. Use the quality slider to fine-tune your iPhone Audio output, then download your converted files one by one or as a single ZIP — no signup and no downloads needed, and your original M4B files are removed from our servers right after. Also see:Turn MIDI into MP3.
Drop your M4B files here to convert to iPhone Audio, or click to browse
Converts .m4b to iPhone Audio (.iphone) in HD quality — bulk, free, no signup
Choose FilesM4B vs iPhone Audio — File Format Comparison
See how M4B and iPhone Audio compare across file extension, MIME type, compression, and feature support. Related:How to turn OGA into OGG?.
| Feature | M4B | iPhone Audio |
|---|---|---|
| File Extension | .m4b | .iphone |
| MIME Type | audio/mp4 | audio/mp4 |
| Compression Type | Lossy | Lossy |
| Metadata Support | Yes | Yes |
What Is M4B Format?
MPEG-4 Audiobook — AAC audio in an MP4 container with bookmarking support, the standard format for audiobooks on Apple Books, Audible exports, and iPhone podcasts. See also:FLAC to ANDROID converter - no registration.
- Compression: Lossy
- Tags & Metadata: Supported
What Is iPhone Audio Format?
iPhone-optimised Audio — AAC/M4A audio encoded at 256 kbps, 44100 Hz stereo for maximum compatibility with iPhone, producing a .m4a file ready to sync via iTunes or AirDrop. You might also need:Switch 3GA to FLAC format.
- Compression: Lossy
- Tags & Metadata: Supported